Paleobiota of the Cañadón Asfalto Formation

The Cañadón Asfalto Formation is a geological formation which dates to the Toarcian age of the Early Jurassic period of Argentina. The rocks of the formation preserve a diverse biota, including plants, dinosaurs, invertebrates, mammals and pterosaurs, among others. The formation is divided into two members: the lower Las Chacritas Member, and the overlying Puesto Almada member, though the latter has also been assigned to the overlying Cañadón Calcáreo Formation by some authors. The members are typically composed of fluvial-lacustrine deposits consisting of sandstones and shales, with a limestone carbonate evaporitic sequence also being present in the lower of the two.

Invertebrates

Color key Taxon Reclassified taxon Taxon falsely reported as present Dubious taxon or junior synonym Ichnotaxon Ootaxon Morphotaxon		Notes Uncertain or tentative taxa are in small text; crossed out taxa are discredited.

Demospongiae

Palaeospongillidae reported from the Cañadon Asfalto Formation
Genus	Species	Location	Stratigraphic position	Material	Notes	Images
Palaeospongilla^[1]	Palaeospongilla chubutensis	Estancia Fossati locality	Las Chacritas Member	Isolated Specimens	A freshwater (Lacustrine) member of Palaeospongillidae (Spongillida Sponges). Represents the main lacustrine bottom inhabitant of the Chacritas Paleolake	Example of the living genus Spongilla. The genus Palaeospongilla was likely similar

Crustacea

Crustacea reported from the Cañadon Asfalto Formation
Genus	Species	Location	Stratigraphic position	Material	Notes	Images
Carapacestheria^[2]^[3]^[4]	Carapacestheria taschi	Cañadón Asfalto Cañadón Lahuincó Cerro Bayo	Las Chacritas Member Puesto Almada Member	Isolated Valves	A freshwater (Lacustrine) member of Eosestheriidae (Spinicaudatan). Originally identified as Cyzicus (Euestheria) taschi. This genus is found in identical alkaline lacustrine settings in the also Toarcian Mawson Formation of Antarctica
Congestheriella^[4]^[5]	Congestheriella rauhuti	Sierra de la Manea Estancia El Torito Cañadón Los Chivos	Puesto Almada Member	Isolated Valves	A freshwater (Lacustrine) member of Afrograptidae (Spinicaudatan). Given the stratigraphic uncertainty, it may come from the Cañadón Calcáreo Formation.
Darwinula^[6]	Darwinula magna Darwinula spp.	Cañadón Asfalto Cañadón Lahuincó Cerro Bayo Cañadón Asfalto Quebrada Subsidiaria Estancia el Torito	Las Chacritas Member Puesto Almada Member	Isolated Valves	A freshwater (Lacustrine) member of Darwinulidae (Ostracod).
Euestheria^[7]^[3]^[4]	Euestheria volkheimeri	Cerro Cóndor Cerro Bayo Alice Creek Quebrada Subsidiaria	Las Chacritas Member Puesto Almada Member	Isolated Valves	A freshwater (Lacustrine) member of Euestheriidae (Spinicaudatan).
Lioestheria^[7]^[3]^[4]	Cyzicus (Lioestheria) sp. B Cyzicus (Lioestheria) sp. C	Cañadón Las Chacritas Colan Conhué Alice Creek	Las Chacritas Member Puesto Almada Member	Isolated Valves	A freshwater (Lacustrine) member of Fushunograptidae (Spinicaudatan).	Extant example of the Genus
Mandelstamia^[7]^[6]	Mandelstamia? spp.	Estancia El Torito	Puesto Almada Member	Isolated Valves	A freshwater (Lacustrine) member of Limnocytheridae (Ostracodan). Given the stratigraphic uncertainty, it may come from the Cañadón Calcáreo Formation
Metacypris^[7]^[6]	Metacypris sp.	Estancia El Torito	Puesto Almada Member	Isolated Valves	A freshwater (Lacustrine) member of Loxoconchidae (Ostracodan). Given the stratigraphic uncertainty, it may come from the Cañadón Calcáreo Formation.
Penthesilenula^[7]^[6]^[8]	Penthesilenula sarytirmenensis	Estancia El Torito	Puesto Almada Member	Isolated Valves	A freshwater (Lacustrine) member of Darwinulidae (Ostracodan). Given the stratigraphic uncertainty, it may come from the Cañadón Calcáreo Formation.
Pseudestherites^[7]	Pseudestherites sp.	Estancia El Torito Cañadón Los Chivos	Puesto Almada Member	Isolated Valves	A freshwater (Lacustrine) member of Antronestheriidae (Spinicaudatan). Given the stratigraphic uncertainty, it may come from the Cañadón Calcáreo Formation.
Theryosinoecum^[7]^[6]	Theryosinoecum barrancalensis minor	Estancia El Torito	Puesto Almada Member	Isolated Valves	A freshwater (Lacustrine) member of Cytheroidea (Ostracodan). Given the stratigraphic uncertainty, it may come from the Cañadón Calcáreo Formation.
Timiriasevia^[7]^[6]	Timiriasevia sp.	Estancia El Torito	Puesto Almada Member	Isolated Valves	A freshwater (Lacustrine) member of Limnocytheridae (Ostracodan). Given the stratigraphic uncertainty, it may come from the Cañadón Calcáreo Formation.
Wolfestheria^[4]	Wolfestheria patagoniensis Wolfestheria smekali	Cañadón Asfalto Cañadón Lahuincó Estancia La Sin Rumbo	Las Chacritas Member Puesto Almada Member	Isolated Valves	A freshwater (Lacustrine) member of Fushunograptidae (Spinicaudatan).

Mollusca

Mollusca reported from the Cañadon Asfalto Formation
Genus	Species	Location	Stratigraphic position	Material	Notes	Images
Corbicula^[9]	Corbicula spp.	Cerro Cóndor Cerro Bayo Estancia El Torito	Las Chacritas Member Puesto Almada Member	Isolated Shells	A freshwater (Lacustrine) member of Corbiculidae (Bivalve).	Extant example of the Genus
Cyanocyclas^[9]	Cyanocyclas spp.	Cerro Cóndor Cerro Bayo Estancia El Torito	Las Chacritas Member Puesto Almada Member	Conchas Aisladas	A freshwater (Lacustrine) member of Corbiculidae (Bivalvo).
Diplodon^[7]^[9]^[10]	Diplodon spix Diplodon cf.matildensis Diplodon cf.spix Diplodon spp.	Cañadón Asfalto Cañadón Lahuincó Cañadón Miyanao Cerro Cóndor Cerro Bayo Alice Creek Quebrada Subsidiaria Estancia El Torito	Las Chacritas Member Puesto Almada Member	Isolated Shells	A freshwater (Lacustrine) member of Unionidae (Bivalve). The most abundant Bivalve genus on the Formation. Represents also some of the smallest-sized specimens recorded in the Mesozoic	Extant example of the Genus
Nayadidae^[11]	Indeterminate	Cañadón Asfalto Cañadón Lahuincó	Las Chacritas Member	Isolated Shells	A freshwater (Lacustrine) member of Unionidae (Bivalve).
Potamolithus^[11]	Potamolithus? spp.	Cañadón Asfalto Cañadón Lahuincó	Las Chacritas Member	Isolated Shells	A freshwater (Lacustrine) member of Tateidae (Snail).	Extant example of the Genus
Sphaeridae^[12]	Indeterminate	Cañadón Asfalto	Las Chacritas Member	Isolated Shells	A freshwater (Lacustrine) member of Sphaeriida (Bivalve).
Viviparus^[9]	Viviparus spp.	Cañadón Asfalto Cañadón Lahuincó Cañadón Asfalto Quebrada Subsidiaria Estancia El Torito	Las Chacritas Member Puesto Almada Member	Isolated Shells	A freshwater (Lacustrine) member of Viviparidae (Snail).	Extant example of the Genus

Insecta

Insect eggs of unknown affinity were reported from several layers of the Estancia Fossati locality.^[1]

Insects reported from the Cañadon Asfalto Formation
Genus	Species	Location	Stratigraphic position	Material	Notes	Images
Chironomidae^[13]	Indeterminate	Gan Gan	Puesto Almada Member	Head capsules	Indeterminate Bittacidae (Migdes) remains, associated with lacustrine facies. Given the stratigraphic uncertainty, it may come from the Cañadón Calcáreo Formation	Extant member of the Family
Coleoptera^[14]	Indeterminate	Cerro Cóndor Estancia Fossati Estancia El Torito Estancia La Sin Rumbo	Las Chacritas Member Puesto Almada Member	Elytra and body remains	Indeterminate Beetle remains, associated with lacustrine facies	Extant example of the Group
Conchindusia^[7]^[14]^[15]	Conchindusia isp.	Cerro Cóndor Estancia Fossati Estancia El Torito Estancia La Sin Rumbo	Las Chacritas Member Puesto Almada Member	Imprints or compressed moulds of larval cases	Indeterminate Trichoptera (Caddisflies) Ichnofossils, associated with lacustrine facies
Heteroptera^[14]	Indeterminate	Cerro Cóndor Estancia Fossati Estancia El Torito Estancia La Sin Rumbo	Las Chacritas Member Puesto Almada Member	Fragmentary wings	Indeterminate Heteroptera remains, associated with lacustrine facies	Extant example of the Group
Neorthophlebidae^[13]	Indeterminate	Gan Gan	Puesto Almada member	Wings and parts of body	Indeterminate Bittacidae (Scorpionfly) remains, associated with lacustrine facies. Given the stratigraphic uncertainty, it may come from the Cañadón Calcáreo Formation
Ostracindusia^[7]^[14]^[15]	Ostracindusia isp.	Cerro Cóndor Estancia Fossati Estancia El Torito Estancia La Sin Rumbo	Las Chacritas Member Puesto Almada Member	Imprints or compressed moulds of larval cases	Indeterminate Trichoptera (Caddisflies) Ichnofossils, associated with lacustrine facies
Terrindusia^[7]^[14]^[15]	Terrindusia isp.	Cerro Cóndor Estancia Fossati Estancia El Torito Estancia La Sin Rumbo	Las Chacritas Member Puesto Almada Member	Imprints or compressed moulds of larval cases	Indeterminate Trichoptera (Caddisflies) Ichnofossils, associated with lacustrine facies
Trichoptera^[7]^[14]^[15]	Indeterminate	Cerro Cóndor Estancia Fossati Estancia El Torito Estancia La Sin Rumbo	Las Chacritas Member Puesto Almada Member	Wings and larval cases	Indeterminate Trichoptera (Caddisflies) remains, associated with lacustrine facies	Extant example of the Group

Vertebrates

Fish

Actinopteri reported from the Cañadon Asfalto Formation
Genus	Species	Location	Stratigraphic position	Material	Notes	Images
Archaeomaenidae^[16]	Indeterminate	Cerro Cóndor Cañadón Asfalto Cañadón Miyanao Estancia Fossati Localidad de Canela^[17] Cañadón Asfalto Quebrada Subsidiaria	Las Chacritas Member	Isolated large median fin & Isolated Scales	A freshwater (Lacustrine) member of Archaeomaenidae (Teleostei). Maybe related to the genus Oreochima, coming from layers coeval, coregional, and of identical deposition of the Mawson Formation of Antarctica	Example of member of the family Archaeomaenidae, Archaeomaene

Amphibians

Amphibians reported from the Cañadon Asfalto Formation
Genus	Species	Location	Stratigraphic position	Material	Notes	Images
Notobatrachus^[18]^[19]	Notobatrachus degiustoi^[20] Notobatrachus reigi Cf.Notobatrachus sp.^[17]	Cañadon Bagual Zitarrosa Cerro Cóndor Canela Queso Rallado	Las Chacritas Member	Many articulated, mostly complete skeletons Most of a partially articulated skeleton and skull	An early frog of the family Notobatrachidae. Notobatrachus degiustoi can be distinguished from N. reigsi by features of the skull. The presence of this anuran in several locations suggests local proliferation linked with lacustrine bodies

Turtles

Turtles reported from the Cañadon Asfalto Formation
Genus	Species	Location	Stratigraphic position	Material	Notes	Images
Condorchelys^[18]^[21]^[22]	Condorchelys antiqua Condorchelys cf.antiqua Condorchelys spp.	Queso Rallado Cañadon Bagual Chucrut Canela facies	Las Chacritas Member	Holotype: Most of a skull, carapace, and plastron. MPEF-PV 3163, left humerus MPEF-PV 3164, costal plate	A stem turtle (Mesochelydian) outside both extant groups, closely related with Kayentachelys aprix of North America and Indochelys spatulata of India. Likely occupied aquatic or semiaquatic niches.^[21]
Testudinata^[22]	Indeterminate	Canela facies	Las Chacritas Member	plastrons	Indeterminate Turtle remains

Lepidosaurs

Lepidosaurs reported from the Cañadon Asfalto Formation
Genus	Species	Location	Stratigraphic position	Material	Notes	Images
Sphenocondor^[23]	Sphenocondor gracilis	Queso Rallado	Las Chacritas Member	Dentary	A Sphenodontian Rhynchocephalian, closely related with Godavarisaurus from the almost coeval Jurassic Kota Formation of India, maybe part of an endemic Gondwanan clade.^[23]

Crocodylomorpha

Crocodyliformes reported from the Cañadón Asfalto Formation
Genus	Species	Location	Stratigraphic position	Material	Notes	Images
Crocodylomorpha^[24]	Indeterminate	Queso Rallado	Las Chacritas Member	Several isolated remains	Indeterminate crocodylomorph remains that represent among the most complete vertebrates linked with lacustrine facies.

Pterosaurs

Pterosaurs reported from the Cañadón Asfalto Formation
Genus	Species	Location	Stratigraphic position	Material	Notes	Images
Allkaruen^[25]	Allkaruen koi	Canadón Carrizal	Las Chacritas Member	A braincase, as well as a mandible and cervical vertebrae.	A pterosaur either related with Breviquartossa or maybe even a sister group of monofenestratan (Wukongopteridae + Pterodactyloidea) pterosaurs
Scaphognathinae?^[26]^[27]	Indeterminate	Las Chacritas	Las Chacritas Member	Uncatalogued specimens, several mandibles, braincase, shoulder girdle, two humeri, several wing-finger phalanges	Indeterminate remains of a pterosaur, possibly a Rhamphorhynchoidea. It seems to represent a rhamphorhynchoid pterosaur with a wingspan of about 1.5–2 meters. The morphology is very similar to that of the lower jaw of the Scaphognathinae.^[27]

Theropods

During a campaign conducted in early 2021, remains of a large theropod dinosaur were found near the town of Las Chacritas. In 2020 a new fossil locality was found, named Cañadón de las Huellas due to the large number of sauropod, and probably theropod, footprints on one of the canyon walls. In the same locality in 2021, articulated remains where recovered and represent at least one sauropod and one large theropod.^[28] At least four theropod morphotypes, including one with ceratosaur and another with Piatnitzkysauridae affinities, are known from the Cañadón Bagual.^[29]

Theropoda reported from the Cañadón Asfalto Formation
Genus	Species	Location	Stratigraphic position	Material	Notes	Images
Asfaltovenator^[30]	Asfaltovenator vialidadi	Cerro Condor	Las Chacritas Member	Nearly compete skull and largely complete front half of the skeleton forward of the hips, distal pubis and fermur and proximal fibula and tibia, partial foot	A probable early member of Allosauroidea
Averostra^[31]	Indeterminate	Cerro Cóndor Puesto el Quemado Cerro Bayo	Las Chacritas Member	Isolated teeth: MPEF BA 182/08, BA 40/08, BA 09/80, BA 88/08, BA 252G+165/08 A, BA 252G+165/08 B, BA 252G+165/08 C	Theropod dinosaur teeth that resemble those assigned to the families Ceratosauridae, Megalosauridae and Abelisauridae
Ceratosauridae^[32]	Indeterminate	Cerro Cóndor	Las Chacritas Member	A dentary with teeth in situ, MPEF-PV 6775	It resembles the dentary of Ceratosaurus
Condorraptor^[26]^[33]	Condorraptor currumili	Las Chacritas	Las Chacritas Member	Partial articulated skeleton	A relative of Piatnitzkysaurus from the same formation, and a possible junior synonym of it as well.
Dromaeosauridae^[31]	Indeterminate	Cerro Cóndor Puesto el Quemado Cerro Bayo	Las Chacritas Member	Isolated Teeth: MEPF BA 61/08, BA 103/08, BA 32/08 A, BA 32/08 B, BA 104/08, BA 226B/08, PV 3498, BA 29/08, BA51/08, BA 270/08 a, BA 270/08 b, BA 270/08 c	Theropod dinosaur teeth that resemble those assigned to the family Dromaeosauridae. Alternatively, they could belong to basal members of Coelurosauria
Eoabelisaurus^[34]	Eoabelisaurus mefi	Jugo Luco	Las Chacritas Member	A nearly complete articulated skeleton	A Neoceratosaur, that was suggested to be a basal member of Abelisauria, but also a member of Ceratosauridae
Megalosauridae^[31]	Indeterminate	Cerro Cóndor Puesto el Quemado Cerro Bayo	Las Chacritas Member	Isolated Teeth: MPEF PV 1175, BA 66/08, PV 1356, PV 1357	Theropod dinosaur teeth that resemble those assigned to the family Megalosauridae.
Neotheropoda^[31]	Indeterminate	Cerro Cóndor Puesto el Quemado Cerro Bayo	Las Chacritas Member	Isolated Teeth: MPEF BA 68/08, BA 92/08, PV 3499, BA 68/08, BA 183/08	Theropod dinosaur teeth that resemble those assigned to basal neotheropods, such as members of Coelophysoidea.
Piatnitzkysauridae^[35]^[31]	Indeterminate	Cerro Cóndor Puesto el Quemado Cerro Bayo	Las Chacritas Member	Isolated Teeth & Cranial remains: MPEF 1717 CC 205, PV 3440A A, PV 3440A B, PV 3440A C, PV 3440A D, PV 3440A E, PV 3440A F, PV 3440A G	Theropod dinosaur teeth that resemble those assigned to members of Piatnitzkysauridae.
Piatnitzkysaurus^[33]^[36]	Piatnitzkysaurus floresi	Cerro Cóndor South	Las Chacritas Member	Two "fragmentary skulls with associated postcranium."^[37]	Possible senior synonym of Condorraptor from the same formation.
Spinosauridae^[31]	Indeterminate	Cerro Cóndor	Las Chacritas Member	Isolated Teeth : MEPF PV 1350	Theropod dinosaur teeth resembling those assigned to members of Spinosauridae. Alternatively, they could belong to members of Ceratosauria
Tetanurae^[31]	Indeterminate	Cerro Cóndor Puesto el Quemado Cerro Bayo	Las Chacritas Member	Isolated Teeth : MEPF BA 84/08, BA 49/08 A, BA 49/08 B, BA 64/08, BA 65/08, BA 266/07	Theropod dinosaur teeth that resemble with those assigned to members of Megalosauridae and Dromaeosauridae
Theropoda^[31]	Indeterminate	Cerro Cóndor	Las Chacritas Member	Isolated Teeth : MPEF PV 1640	"Outlier" tooth that doesn't fit in any previously known morphotype, maybe due to preservation
Theropodipedia^[38]	Theropodipedia ichnog. indeterminate	Cerro Cóndor	Las Chacritas Member	Footprints	Possible theropod footprints, unassigned to any concrete ichnogenus

Sauropodomorphs

Sauropodiformes reported from the Cañadón Asfalto Formation
Genus	Species	Location	Stratigraphic position	Material	Notes	Images
Bagualia^[39]	Bagualia alba	Cañadon Bagual	Las Chacritas Member	The partial skeletons of three individuals	An early member of Eusauropoda, related with the African genus Spinophorosaurus
Diplodocidae^[40]^[41]	Indeterminate	Cerro Condor Sur	Las Chacritas Member	MACN-CH 934: axial neural arches and spines, an ilium, a pubis, ?two or ?three ischia, and two maxillae	This specimen shows strong Diplodocidae affinities, yet it has been considered either a derived non-neosauropodan eusauropod (having resemblance with Lapparentosaurus in some characters) or even a basal neosauropod ( also resembling with Haplocanthosaurus)
Eusauropoda^[41]	Indeterminate	Cerro Condor Sur	Las Chacritas Member	MACN-CH 230: three dorsal vertebrae	Likely a eusauropod, possibly a cetiosaurid. Smaller than other sauropod taxa found in the formation.
Patagosaurus^[42]^[43]	Patagosaurus fariasi	Cerro Condor	Las Chacritas Member	Many specimens, including a partial skull.	A non-neosauropodan eusauropodan member of Cetiosauridae. This genus represents the most abundant sauropod in the formation
Sauropodiformes^[44]	Indeterminate	Queso Rallado, near Cerro Cóndor	Las Chacritas Member	Isolated Teeth: MPEF-PV 10860	An indeterminate Sauropodiform or a very basal sauropod or even dental material of Volkheimeria.^[45]
Sauropoda^[41]	Indeterminate	Cerro Condor Sur	Las Chacritas Member	MACN-CH 219, 223(+221), 231	Too fragmentary to be ascribed to any taxon, currently classified as Sauropoda indet.
Titanosauriformes^[46]	Indeterminate	Queso Rallado, near Cerro Cóndor	Las Chacritas Member	Isolated Teeth: MPEF-PV 10606	An indeterminate Titanosauriform. It can be alternatively a basal Eusauropod. Possible relationships with Atlasaurus
Volkheimeria^[41]	Volkheimeria chubutensis	Cerro Cóndor South	Las Chacritas Member	"Partial skeleton consisting of presacral and sacral vertebrae, pelvis, [and] hindlimb."	Either a gravisaur or a sister taxon of the Indian genus Barapasaurus

Ornithischians

Ornithischians reported from the Cañadón Asfalto Formation
Genus	Species	Location	Stratigraphic position	Material	Notes	Images
Cerapoda^[47]	Indeterminate	Queso Rallado	Las Chacritas Member	Isolated ungual phalanx and Isolated Teeth: MPEF-PV 3818, MPEF-PV 3824, MEPF-PV 3820, MEPF-PV 3825, MEPF-PV 10861, MPEF-PV 10823, MPEF-PV 3821 & MPEF-PV 10864	An indeterminate Cerapodan with resemblances with Hypsilophodon. Some of the referred remains have been reclassified as Manidens material
Heterodontosauridae^[47]	Indeterminate	Queso Rallado	Las Chacritas Member	Metapodials, caudal vertebrae, and isolated phalanges: MPEF-PV 3826	heterodontosaurid that cannot be compared with Manidens due to the lack of overlapping fossils.
Manidens^[48]^[47]	Manidens condorensis	Queso Rallado Sitio Frenguelli Sitio Canela	Las Chacritas Member	Partial articulated specimen, skull & associated elements as well referred isolated teeth: MPEF-PV 3809, MPEF-PV 3211, MPEF-PV 3808, MPEF-PV 10867, MPEF-PV 1719, MPEF-PV 1786, MPEF-PV 1718, MPEF-PV 3810, MPEF-PV 3811, MPEF-PV 3812, MPEF-PV 3813, MPEF-PV 3814, MPEF-PV 3815, MPEF-PV 3816, MPEF-PV 10866	A primitive and small heterodontosaurid. Fossils attributed to this genus may have been at least partially arboreal. Principal component analysis found that the feet of Manidens were most similar to those of tree-perching birds.^[49]
Ornithischia^[47]	Indeterminate	Queso Rallado	Las Chacritas Member	Isolated teeth: MPEF-PV 3817, MPEFPV 3819, MPEF-PV 3822.	Not referable to any taxa beyond Ornithischia Indet.

Mammals

Mammals reported from the Cañadón Asfalto Formation
Genus	Species	Location	Stratigraphic position	Material	Notes	Images
Allotheria^[50]	Indeterminate	Queso Rallado	Las Chacritas Member	Isolated Teeth	An Allotherian whose affinities hasn't been tested
Argentoconodon^[51]	Argentoconodon fariasorum	Queso Rallado	Las Chacritas Member	MPEF-PV2362, fragmentary left maxilla, MPEF-PV2363 partial skeleton, MPEFPV2364 isolated complete right upper last molariform	A volaticotherian (Alticonodontinae), closely related to the Asian genus Volaticotherium, having similar postcraneal appearance, indicating possible gliding capabilities, yet better material is needed to prove it.^[51]
Asfaltomylos^[18]^[52]	Asfaltomylos patagonicus	Queso Rallado	Las Chacritas Member	MPEF PV 1671, complete lower maxilla	An Australosphenidan, related to Henosferus in Henosferidae.
Condorodon^[50]	Condorodon spanios	Queso Rallado	Las Chacritas Member	MPEF-PV 2365, isolated complete lower left molariform	An "amphilestid" triconodont, related with the late jurassic African Tendagurodon.^[50]
Henosferus^[18]^[53]	Henosferus molus Henosferus sp.	Queso Rallado Canela^[17]	Las Chacritas Member	MPEF 2353 right lower jaw, MPEF 2354 Left lower jaw, MPEF 2357 Left lower jaw, referred MPEF 2355 isolated upper premolar	An Australosphenidan, related to Asfaltomylos in Henosferidae, being twice as large as this last one.^[53]

Fungi

Genus	Species	Location	Stratigraphic position	Member	Material	Ecogroup	Palaeoclimate requirements	Notes
Annella^[54]	Annella capitata	Central Patagonia	Cañadon Lahuincó	Las Chacritas Member	Hypae and Miospores	Unknown: either Aquatic (Freshwater) or Parasitic	Unknown, suggested highly seasonality	A Fungus of uncertain relationships. This species is recovered in both coal seams and proximal prodelta sediments, making the assignation of a biome complex.^[54]

Plants

According to a palynological study the dominant pollen was produced by the conifer families Cheirolepidiaceae (Classopollis) and Araucariaceae (mainly Araucariacites and Callialasporites), suggesting that warm-temperate and relatively humid conditions under highly seasonal climate prevailed during the depositional times of the unit. The abundance of Botryococcus supports the presence of a shallow lake with probably saline conditions.^[55] Locally, the Cañadón Asfalto represents a more poor record of the floras seen in the undeliying Lonco Tapial Formation, with its closest floras found on the Antarctic Peninsula Sweeney Formation at Potter Peak, sharing Brachyphyllum spp. and Elatocladus confertus.^[56]

Phytoplankton

Genus	Species	Location	Member	Material	Ecogroup	Palaeoclimate requirements	Notes	Images
Botryococcus^[55]^[57]^[7]	Botryococcus sp. cf. B. braunii Botryococcus spp	Cañadon Lahuincó Cañadón Caracoles Cerro Bandera	Las Chacritas Member Puesto Almada Member	Algae	Aquatic (freshwater); Alkaline indicator	Highly seasonal climate	A freshwater algae of the family Botryococcaceae. This genus is the main indicator, due to its abundance, of the presence of a shallow lake with probably saline conditions, reaching in some samples about 96 to 70%.^[55]	Extant specimen
Leiosphaeridia^[55]^[57]	Leiosphaeridia sp.	Cañadon Lahuincó Cañadón Caracoles	Las Chacritas Member	Zygospores	Aquatic (freshwater)	Temperate to warm; seasonal climate	Algae or Algae Acritarch of the family Prasinophyceae.
Ovoidites^[55]^[57]	Ovoidites spp.	Cañadon Lahuincó Cañadón Caracoles	Las Chacritas Member	Zygospores	Aquatic (freshwater)	Temperate to warm; seasonal climate	Algae of the family Zygnemataceae	Extant Spirogyra; Ovoidites may be derived from a similar genus

Bryophyta

Genus	Species	Location	Member	Material	Ecogroup	Palaeoclimate requirements	Notes	Images
Antulsporites^[55]	Antulsporites saevus	Cañadon Lahuincó Cañadón Caracoles	Las Chacritas Member	Spores	Upland and Riverside	Can withstand long periods of drought; seasonal climate	Affinities with the family Sphagnaceae in the Sphagnopsida. "Peat moss" spores, related to genera such as Sphagnum that can store large amounts of water.	Extant Sphagnum specimens; Stereisporites, Sculptisporis and Rogalskaisporites probably come from similar genera
Neoraistrickia^[55]	Neoraistrickia cf. suratensis	Cañadon Lahuincó Cañadón Caracoles	Las Chacritas Member	Spores	Upland and Lowland	Warm to temperate, relatively wet	Affinities with the family Selaginellaceae and Lycopodiaceae in the Lycopsida.
Nevesisporites^[55]^[57]	Nevesisporites vallatus Nevesisporites cf. undatus Nevesisporites cf. radiatus	Cañadon Lahuincó Cañadón Caracoles	Las Chacritas Member	Spores	Upland and Riverside	Can withstand long periods of drought; seasonal climate	Affinities with Bryophyta.
Retitriletes^[55]	Retitriletes austroclavatidites Retitriletes semimuris Retitriletes sp. 1	Cañadon Lahuincó Cañadón Caracoles	Las Chacritas Member	Spores	Upland and Lowland	Warm to temperate, relatively wet	Affinities with Bryophyta.
Stereisporites^[55]	Stereisporites sp. cf. S. psilatus	Cañadon Lahuincó Cañadón Caracoles	Las Chacritas Member	Spores	Upland and Riverside	Can withstand long periods of drought; seasonal climate	Affinities with the family Sphagnaceae in the Sphagnopsida.

Equisetales

Genus	Species	Location	Member	Material	Ecogroup	Palaeoclimate requirements	Notes	Images
Equisetites^[57]^[11]^[58]^[59]	Equisetites approximatus Equisetites spp.	Cañadon Asfalto Cañadon Lahuincó Paso de Indios	Las Chacritas Member	Stems	Lowland and Riverside	Warm to temperate, relatively wet	Plants of the group Equisetales. Usually linked with riversides	Equisetites specimen

Pteridophyta

Genus	Species	Location	Member	Material	Ecogroup	Palaeoclimate requirements	Notes	Images
Baculatisporites^[57]	Baculatisporites comaumensis	Cañadon Lahuincó	Las Chacritas Member	Spores	Lowland and Riverside	Warm to temperate, relatively wet	Affinities with the family Osmundaceae in the Polypodiopsida. Near fluvial current ferns, related to the modern Osmunda regalis.	Extant Osmunda specimens; Baculatisporites probably come from similar genera or maybe a species from the genus
Biretisporites^[55]	Biretisporites sp. A	Cañadon Lahuincó Cañadón Caracoles	Las Chacritas Member	Spores	Lowland and Riverside	Warm to temperate, relatively wet	Affinities with the Marattiaceae in the Polypodiopsida. Fern spores from low herbaceous flora.	Extant Marattia specimens; Marattisporites probably comes from similar genera
Cadargasporites^[55]	Cadargasporites sp. cf. C. reticulatus	Cañadon Lahuincó Cañadón Caracoles	Las Chacritas Member	Spores	Lowland and Riverside	Warm to temperate, relatively wet	Uncertain affinity Fern Spores Filicopsida incertae sedis
Cladophlebis^[57]^[58]^[59]	Cladophlebis grahami Cladophlebis oblonga	Cañadon Asfalto Cañadon Lahuincó Paso de Indios	Las Chacritas Member	Isolated Pinnae	Lowland and Riverside	Warm to temperate, relatively wet	Plants of the family Osmundaceae.
Clavatisporites^[55]	Clavatisporites spp.	Cañadon Lahuincó Cañadón Caracoles	Las Chacritas Member	Spores	Lowland and Riverside	Warm to temperate, relatively wet	Filicopsida incertae sedis
Deltoidospora^[55]	Deltoidospora australis Deltoidospora minor	Cañadon Lahuincó	Las Chacritas Member	Spores	Upland, Lowland and Riverside	Warm to temperate, relatively wet	Affinities with the families Cyatheaceae/Dicksoniaceae Dipteridaceae/Matoniaceae in the Polypodiopsida.
Dictyophyllidites^[55]^[57]	Dictyophyllidites harrisii	Cañadon Lahuincó Cañadón Caracoles	Las Chacritas Member	Spores	Lowland and Riverside	Warm to temperate, relatively wet
Gleichenites^[59]	Gleichenites cf.taquetrensis	Paso de Indios	Las Chacritas Member	Isolated Pinnae	Lowland and Riverside	Warm to temperate, relatively wet	Plants of the family Gleicheniales.
Ischyosporites^[55]	Ischyosporites marburgensis	Cañadon Lahuincó Cañadón Caracoles	Las Chacritas Member	Spores	Upland, Lowland Riverside	Warm to temperate, relatively wet	Affinities with the family Lygodiaceae and Schizaeaceae in the Polypodiopsida. Climbing or herbaceous fern spores.	Extant Lygodium; Lygodioisporites probably comes from similar genera or maybe a species from the genus
Klukisporites^[55]	Klukisporites lacunus Klukisporites variegatus Klukisporites sp. cf. K. scaberis	Cañadon Lahuincó Cañadón Caracoles	Las Chacritas Member	Spores	Upland, Lowland Riverside	Warm to temperate, relatively wet
Obtusisporis^[55]	Obtusisporis modestus	Cañadon Lahuincó Cañadón Caracoles	Las Chacritas Member	Spores	Lowland and Riverside	Warm to temperate, relatively wet	Filicopsida incertae sedis
Rugulatisporites^[57]	Rugulatisporites sp.	Cañadon Lahuincó	Las Chacritas Member	Spores	Lowland and Riverside	Warm to temperate, relatively wet	Affinities with the family Osmundaceae in the Polypodiopsida.
Sphenopteris^[57]^[58]	Sphenopteris patagonica Sphenopteris hallei	Cañadon Asfalto Cañadon Lahuincó	Las Chacritas Member	Isolated Pinnae	Upland, Lowland and Riverside	Warm to temperate, relatively wet	Plants of the group Sphenopteridae, whose affinity for mesozoic specimens is uncertain, yet has been suggested to be fronds of Dicksoniaceae affinity
Todisporites^[57]	Todisporites minor	Cañadon Lahuincó	Las Chacritas Member	Spores	Upland	Warm to temperate, relatively wet. Can withstand long periods of drought; seasonal climate	Affinities with the family Osmundaceae in the Polypodiopsida.
Trilobosporites^[55]	Trilobosporites sp.	Cañadon Lahuincó	Las Chacritas Member	Spores	Upland, Lowland and Riverside	Warm to temperate, relatively wet	Affinities with the families Cyatheaceae/Dicksoniaceae Dipteridaceae/Matoniaceae in the Polypodiopsida.
Verrucosisporites^[57]	Verrucosisporites varians	Cañadon Lahuincó	Las Chacritas Member	Spores	Upland	Can withstand long periods of drought; seasonal climate	Affinities with the family Osmundaceae in the Polypodiopsida.

Peltaspermales

Genus	Species	Location	Member	Material	Ecogroup	Palaeoclimate requirements	Notes	Images
Alisporites^[55]^[57]^[7]	Alisporites similis Alisporites lowoodensis Alisporites spp.	Cañadon Lahuincó Cañadón Caracoles Cerro Bandera	Las Chacritas Member Puesto Almada Member	Pollen	Riverside	Warm, can withstand long periods of drought; seasonal climate	Affinities with the families Peltaspermaceae, Corystospermaceae or Umkomasiaceae in the Peltaspermales. Pollen of uncertain provenance that can be derived from any of the members of the Peltaspermales.
Antevsia^[60]	Antevsia sp.	Pomelo locality	Las Chacritas Member	Pollen-bearing organs	Lowland and Riverside	Warm, can withstand long periods of drought; seasonal climate	Plants of the group Peltaspermaceae.
Archangelskya^[57]^[58]^[59]	Archangelskya furcata	Cañadon Asfalto Cañadon Lahuincó	Las Chacritas Member	Isolated Pinnae	Lowland and Riverside	Warm, can withstand long periods of drought; seasonal climate	Plants of the group Pteridospermata
Lepidopteris^[61]^[62]	Lepidopteris scassoi	Pomelo locality A12 locality	Las Chacritas Member	Isolated Pinnae	Lowland and Riverside	Warm, can withstand long periods of drought; seasonal climate	Plants of the group Peltaspermaceae. This species represents the youngest record of the genus, by more than 20 Myr.
Peltaspermum^[59]^[61]	Peltaspermum sp.	Pomelo locality A12 locality	Las Chacritas Member	Ovuliferous Cones	Lowland and Riverside	Warm, can withstand long periods of drought; seasonal climate	Plants of the group Peltaspermaceae.
Vitreisporites^[55]	Vitreisporites pallidus	Cañadon Lahuincó	Las Chacritas Member	Pollen	Riverside	Warm, relatively wet	From the family Caytoniaceae in the Caytoniales. Caytoniaceae are a complex group of Mesozoic fossil floras that may be related to both Peltaspermales and Ginkgoaceae.

Cycadeoidopsida

Genus	Species	Location	Member	Material	Ecogroup	Palaeoclimate requirements	Notes	Images
Zamites^[59]^[61]	Zamites sp.	Pomelo locality A12 locality	Las Chacritas Member	Leaflets	Lowland and Riverside	Warm to temperate, can withstand long periods of drought; seasonal climate	Affinities with Bennettitales inside Cycadeoidopsida.

Czekanowskiales

Genus	Species	Location	Member	Material	Ecogroup	Palaeoclimate requirements	Notes	Images
Phoenicopsis^[11]^[59]	Phoenicopsis sp.	Cañadon Asfalto	Las Chacritas Member	Pollen Organs	Lowland and Riverside	Warm to temperate, can withstand long periods of drought; seasonal climate	Plants of the group Leptostrobales (Czekanowskiales). Gingko-like taxa

Gnetopsida

Genus	Species	Location	Member	Material	Ecogroup	Palaeoclimate requirements	Notes	Images
Ephedripites^[57]^[7]	Ephedripites spp.	Cañadon Lahuincó Cerro Bandera	Las Chacritas Member Puesto Almada Member	Pollen	Lowland and Riverside	Warm to temperate, can withstand long periods of drought; seasonal climate	A Pollen Grain, affinities with Ephedraceae inside Gnetopsida.	Extant Ephedra, typical example of Ephedraceae. Equisetosporites probably come from a similar or a related Plant

Coniferophyta

Genus	Species	Location	Member	Material	Ecogroup	Palaeoclimate requirements	Notes	Images
Araucariacites^[55]^[57]^[7]	Araucariacites australis Araucariacites fissus Araucariacites pergranulatus Araucariacites sp. cf. A. pergranulatus Araucariacites sp. A	Cañadon Lahuincó Cañadón Caracoles Cerro Bandera	Las Chacritas Member Puesto Almada Member	Pollen	Upland, Lowland and Riverside	?Warm to temperate, relatively wet	Affinities with the family Araucariaceae in the Pinales. Conifer pollen from medium to large arboreal plants.
Araucaritites^[57]^[58]^[59]	Araucaritites chuchensis Araucaritites spp.	Cañadon Asfalto Pomelo locality A12 locality Cañadon Lahuincó Estancia La Vistosa Paso de Indios	Las Chacritas Member	Ovuliferous scales	Upland, Lowland and Riverside	?Warm to temperate, relatively wet	Plants of the family Araucariaceae.
Athrotaxites^[57]^[58]^[59]	Athrotaxites ungeri	Cañadon Asfalto Cañadon Lahuincó	Las Chacritas Member	Branched shoots	Upland	?Warm to temperate, relatively wet	Plants of the family Taxodiaceae
Austrohamia^[59]^[63]	Austrohamia asfaltensis	Cañadon Lahuincó	Las Chacritas Member	Branched shoots & Ovuliferous cones	Upland, Lowland and Riverside	?Warm to temperate, relatively wet	Plants of the family Cunninghamioideae. Along with the also Argentinian species A. minuta, this specimens represent the oldest fossil taxa that can be confidently assigned to Cupressaceae sensu lato
Brachyoxylon^[59]^[64]	Brachyoxylon currumilii	Pomelo locality	Las Chacritas Member	Fossil Wood	Upland, Lowland and Riverside	?Warm to temperate, relatively wet	Plants of the family Araucariaceae or Cheirolepidiaceae
Brachyphyllum^[57]^[58]^[59]^[61]	Brachyphyllum cf. lotenaense Brachyphyllum spp.	Cañadon Asfalto Pomelo locality A12 locality Cañadon Lahuincó Paso de Indios Canela locality	Las Chacritas Member	Branched shoots & Ovuliferous cones	Upland, Lowland and Riverside	?Warm to temperate, relatively wet	Plants of the family Araucariaceae or Cheirolepidiaceae
Callialasporites^[55]^[57]^[7]	Callialasporites dampieri Callialasporites microvelatus Callialasporites turbatus Callialasporites minus Callialasporites sp. 1	Cañadon Lahuincó Cañadón Caracoles Cerro Bandera	Las Chacritas Member Puesto Almada Member	Pollen	Upland, Lowland and Riverside	?Warm to temperate, relatively wet	Affinities with the family Araucariaceae in the Pinales. Conifer pollen from medium to large arboreal plants.
Cerebropollenites^[55]^[57]^[7]	Cerebropollenites macroverrucosus Cerebropollenites carlylensis Cerebropollenites mesozoicus Cerebropollenites sp. 1	Cañadon Lahuincó Cañadón Caracoles Cerro Bandera	Las Chacritas Member Puesto Almada Member	Pollen	Upland, Lowland and Riverside	?Warm to temperate, relatively wet	Affinities with both Sciadopityaceae and Miroviaceae in the Pinopsida. This pollen's resemblance to extant Sciadopitys suggest that Miroviaceae may be an extinct lineage of Sciadopityaceae-like plants.^[65]	Extant Sciadopitys. Cerebropollenites likely come from a related plant
Classopollis^[55]^[57]^[7]	Classopollis classoides Classopollis intrareticulatus Classopollis simplex Classopollis itunensis Classopollis torosus	Cañadon Lahuincó Cañadón Caracoles Cerro Bandera	Las Chacritas Member Puesto Almada Member	Pollen	Lowland and Coastal lake	Warm to temperate, can withstand long periods of drought; seasonal climate	Affinities with the Hirmeriellaceae in the Pinopsida. Classopollis is the most abundant component of the assemblage, with ranges from 73 to 81.6% to 89.6%-89.7% in some samples.^[55]
Elatoclaudus^[57]^[58]^[59]	Elatocladus confertus Elatoclaudus jabalpurensis	Cañadon Asfalto Cañadon Lahuincó	Las Chacritas Member	Branched shoots	Upland and Lowland	Warm to temperate, can withstand long periods of drought; seasonal climate	Plants of the family Cupressaceae
Exesipollenites^[57]	Exesipollenites sp.	Cañadon Lahuincó	Las Chacritas Member	Pollen	Lowland and Coastal lake	Warm to temperate, can withstand long periods of drought; seasonal climate	Affinities with the Hirmeriellaceae in the Pinopsida. Classopollis is the most abundant component of the assemblage, with ranges from 73 to 81.6% to 89.6%-89.7% in some samples.^[55]
Indusiisporites^[55]	Indusiisporites parvisaccatus Indusiisporites sp. 1 Indusiisporites sp. 2 Indusiisporites sp. 3	Cañadón Lahuincó Cañadón Caracoles	Las Chacritas Member	Pollen	Upland	Temperate, relatively dry	Affinities with the family Podocarpaceae. Pollen from diverse types of Podocarpaceous conifers, that include morphotypes similar to the low arbustive Microcachrys and the medium arbustive Lepidothamnus, likely linked with Upland settings
Inaperturopollenites^[55]	Inaperturopollenites indicus Inaperturopollenites giganteus Inaperturopollenites microgranulatus Inaperturopollenites cf. reidi Inaperturopollenites sp. 1 Inaperturopollenites sp. 2	Cañadon Lahuincó	Las Chacritas Member	Pollen	Upland, Lowland and Riverside	?Warm to temperate, relatively wet	Affinities with the family Araucariaceae in the Pinales. Conifer pollen from medium to large arboreal plants.
Microcachryidites^[57]^[7]	Microcachryidites castellanosii Microcachryidites antarcticus	Cañadón Lahuincó Cañadón Caracoles Cerro Bandera	Las Chacritas Member Puesto Almada Member	Pollen	Upland	Temperate, relatively dry	Affinities with the family Podocarpaceae. Pollen from Podocarpaceous conifers similar to the low arbustive Microcachrys	Extant Microcachrys Cone, example of the Podocarpaceae. Microcachryidites is similar to the pollen found on this genus
Pagiophyllum^[57]^[58]^[59]^[61]	Pagiophyllum divaricatum Pagiophyllum fiestmantelli	Cañadon Asfalto Pomelo locality A12 locality Cañadon Lahuincó Paso de Indios Canela locality	Las Chacritas Member	Branched shoots	Lowland and Coastal lake	Warm to temperate, can withstand long periods of drought; seasonal climate	Plants of the family Araucariaceae or Cheirolepidiaceae
Pelourdea^[11]^[59]	Pelourdea sp.	Cañadon Asfalto	Las Chacritas Member	Pollen Organs	Lowland and Coastal lake	Warm to temperate, can withstand long periods of drought; seasonal climate	Incertae sedis inside Coniferales, suggested as a member of its own family, the "Pelourdeaceae". A hygrophytic riparian conifer with herbaceous or shrubby habit. Some specimens are difficult to identify.
Perinopollenites^[57]	Perinopollenites elatoides	Cañadón Lahuincó	Las Chacritas Member	Pollen	Upland and Lowland	Warm to temperate; seasonal climate	Affinities with the family Cupressaceae in the Pinopsida. Pollen that resembles that of extant genera such as the genus Actinostrobus and Austrocedrus, probably derived from Upland environments.	Extant Austrocedrus. Exesipollenites and Perinopollenites maybe come from a related plant
Phrixipollenites^[57]	Phrixipollenites sp.	Cañadón Lahuincó	Las Chacritas Member	Pollen	Upland	Temperate, relatively dry	Affinities with the family Podocarpaceae.
Pinuspollenites^[55]	Pinuspollenites globosaccus	Cañadon Lahuincó Cañadón Caracoles	Las Chacritas Member	Pollen	Upland, Lowland and Riverside	?Warm to temperate, relatively wet	Affinities with the family Pinaceae in the Pinopsida. Conifer pollen from medium to large arboreal plants.
Podocarpidites^[55]^[57]	Podocarpidites verrucosus Podocarpidites astrictus Podocarpidites ellipticus Podocarpidites multesimus Podosporites variabilis Podocarpidites sp. cf. P. radiatus Podocarpidites sp. cf. P. verrucosus Podosporites sp. 1	Cañadón Lahuincó Cañadón Caracoles	Las Chacritas Member	Pollen	Upland	Temperate, relatively dry	Affinities with the family Podocarpaceae.	Extant Podocarpus Cone, example of the Podocarpaceae. Podocarpidites is similar to the pollen found on this genus
Podosporites^[55]	Podosporites variabilis Podosporites sp. 1	Cañadón Lahuincó Cañadón Caracoles	Las Chacritas Member	Pollen	Upland	Temperate, relatively dry

See also

•  Argentina portal
•  Dinosaurs portal
•  Earth sciences portal
•  Paleontology portal

• Cañadón Asfalto Formation
• Cañadón Calcáreo Formation

References

1. Cabaleri, N. G.; Benavente, C. A. (2013). "Sedimentology and paleoenvironments of the Las Chacritas carbonate paleolake, Cañadón Asfalto Formation (Jurassic), Patagonia, Argentina". Sedimentary Geology. 284 (4): 91–105. Bibcode:2013SedG..284...91C. doi:10.1016/j.sedgeo.2012.11.008. hdl:11336/182449. Retrieved 29 July 2022.
2. Gallego, O.F.; Cabaleri, N.G. (2005). "Conchóstracos de la Formación Cañadón Asfalto (Jurásico Medio – Superior): análisis preliminar de su distribución estratigráfica". Ameghiniana: II Simposio Argentino del Jurásico (Buenos Aires). 42 (2): 51.
3. Tasch, P.; Volkheimer, W. (1970). "Jurassic conchostracans from Patagonia". The University of Kansas Paleontological Contributions. 50 (3): 24–48. Retrieved 29 July 2022.
4. Monferran, M. D.; Gallego, O. F.; Cabaleri, N. G. (2020). "Revision of Two Spinicaudatan Species from the Cañadón Asfalto Formation (Jurassic), Patagonia Argentina". Zoological Studies. 59 (3): 112–123. doi:10.6620/ZS.2020.59-37. PMC 7689052. PMID 33262859.
5. Gallego, O.F.; Shen, Y.B.; Cabaleri, N.G.; Hernández, M. (2010). "The genus Congestheriella Kobayashi, 1954 ("Conchostraca", Diplostraca, Afrograptioidea): redescription and new combination to Isaura olsoni Bock from Venezuela and a new species from Argentina (Upper Jurassic)". Alavesia. 3 (6): 11–24. Retrieved 2022-07-29.
6. Musacchio, E.A. (1995). "Estratigrafía y micropalentología del Jurásico y el Cretácico en la comarca del Valle Medio del Río Chubut, Argentina". Actas 6º Congreso Argentino de Paleontología y Bioestratigrafía. 6 (12): 179–187.
7. Cabaleria, Nora G.; Benavente, Cecilia A.; Monferranc, Mateo D.; Narváez, Paula L.; Volkheimer, Wolfgang; Gallego, Oscar F.; Do Campoa, Margarita D. (2011). "Sedimentology and palaeontology of the Upper Jurassic Puesto Almada Member (Cañadón Asfalto Formation, Fossati sub-basin), Patagonia Argentina: Palaeoenvironmental and climatic significance". Sedimentary Geology. 296 (1): 103–121. doi:10.1016/j.sedgeo.2013.08.011. hdl:11336/2418.
8. Ballent, S.C.; Díaz, A.R. (2011). "Contribution to the taxonomy, distribution and paleoecology of the early representatives of Penthesilenula Rossetti & Martens, 1998 (Crustacea, Ostracoda, Darwinulidae) from Argentina, with the description of a new species". Hydrobiologia. 688 (10): 125–138. doi:10.1007/s10750-011-0658-8. S2CID 254547791. Retrieved 2022-07-29.
9. Martínez, S.; Gallego, O.F; Cabaleri, N. (2007). "Nueva fauna de moluscos de la Formación Cañadón Asfalto (Jurásico Medio a Superior) Chubut, Argentina". Ameghiniana. 44 (4): 96. Retrieved 2022-07-29.
10. Monferran, Mateo Daniel; Cabaleri, Nora; Armella, Claudia; Martínez, Sergio; Gallego, Oscar; Zacarías, Iracema; Calathaki, Hugo Barrios (2023-01-31). "Freshwater bivalves and their environmental conditions in a Jurassic lacustrine system (Cañadón Asfalto Formation) from Patagonia, Argentina". Andean Geology. 50 (2): 248. doi:10.5027/andgeoV50n2-3461. ISSN 0718-7106.
11. Frenguelli, J. (1949). "Los estratos con "Estheria" en el Chubut (Patagonia)". Revista de la Asociación Geológica Argentina. 4 (4): 11–24. Retrieved 27 December 2021.
12. Cabaleri, N.; Volkheimer, W.; Armella, C.; Gallego, O.; Silva Nieto, D.; Páez, M.; Koukharsky, M. (2010). "Estratigrafía, análisis de facies y paleoambientes de la Formación Cañadón Asfalto en el depocentro jurásico Cerro Cóndor, provincia del Chubut". Revista de la Asociación Geológica Argentina. 66 (3): 349–367. Retrieved 2022-09-05.
13. Petrulevicius, F. (2007). "A new species of Bittacidae sensu lato (Mecoptera) from the Callovian-Oxfordian: new Jurassic locality of insect body fossils from Patagonia, Argentina". Proceedings of the 4th International Congress of Paleoentomology, International Palaeoentomological Society, Vitoria-Gasteiz, Diputación Forai de Álava, Spain. 275 (4): 23. Retrieved 2022-07-29.
14. Andrade-Morraye, M.; Genise, J. (2005). "An association of fossil larval tubes and head capsules of Chironomidae (Diptera) from the Jurassic (Callovian–Oxfordian) Cañadón Asfalto Formation, Patagonia, Argentina". Proceedings of the Fossils X3, International Paleoentomological Society, Pretoria. 3 (1): 5.
15. Gallego, O. F.; Cabaleri, N. G.; Armella, C.; Volkheimer, W.; Ballent, S. C.; Martínez, S.; Páez, M. A. (2011). "Paleontology, sedimentology and paleoenvironment of a new fossiliferous locality of the Jurassic Cañadón Asfalto Formation, Chubut Province, Argentina". Journal of South American Earth Sciences. 31 (1): 54–68. Bibcode:2011JSAES..31...54G. doi:10.1016/j.jsames.2010.11.001. Retrieved 2022-07-29.
16. López-Arbarello, A.; Rauhut, O. W.; Moser, K. (2008). "Jurassic fishes of Gondwana". Revista de la Asociación Geológica Argentina. 63 (4): 586–612. Retrieved 29 July 2022.
17. Turazzini, G. F.; Appella-Guiscafre, L. S.; Lires, A. I.; Garberoglio, F.; Canessa Leandro, A.; Gómez, R. O.; Rougier, G. W. (2017). "Promising future: a new mammal-bearing microvertebrate locality from the Cañadón Asfalto formation (Jurassic; Chubut, Argentina)". Ameghiniana: Congreso; XI Congreso de la Asociación Paleontológica Argentina. XI (1): 54–52. Retrieved 1 August 2022.
18. Escapa, I.H.; Sterli, J.; Pol, D.; Nicoli, L. (2008). (PDF). Revista de la Asociación Geológica Argentina. 63 (4): 613–624. Archived from the original (PDF) on 2014-09-24. Retrieved 2014-09-17.
19. Barcelos, L. A.; dos Santos, R. O. (2022). "The Lissamphibian Fossil Record of South America". Palaeobiodiversity and Palaeoenvironments. 176 (4): 341–405. doi:10.1007/s12549-022-00536-0. S2CID 250077749. Retrieved 1 August 2022.
20. Báez, A. M.; Nicoli, L. (2008). "A new species of Notobatrachus (Amphibia, Salientia) from the Middle Jurassic of northwestern Patagonia". Journal of Paleontology. 82 (2): 372–376. Bibcode:2008JPal...82..372B. doi:10.1666/06-117.1. S2CID 130032431. Retrieved 1 August 2022.
21. Sterli, J.; De La Fuente, M. S.; Rougier, G. W. (2018). "New remains of Condorchelys antiqua (Testudinata) from the Early-Middle Jurassic of Patagonia: anatomy, phylogeny, and paedomorphosis in the early evolution of turtles". Journal of Vertebrate Paleontology. 38 (4): (1)-(17). Bibcode:2018JVPal..38....1S. doi:10.1080/02724634.2018.1480112. S2CID 109556104. Retrieved 1 August 2022.
22. Sterli, J.; Vlachos, E.; Puerta, P.; Oriozabala, C.; Krause, M. (2021). "Contribution to the diversity of the fossil record of turtles (Testudinidata) from Chubut province (Argentina) and its significance in understanding the evolution of turtles in southern South America". Publicación Electrónica de la Asociación Paleontológica Argentina. 21 (1): 118–160. Retrieved 31 March 2022.
23. Apesteguía, S. N.; Gómez, R. L. O.; Rougier, G. W. (2012). "A basal sphenodontian (Lepidosauria) from the Jurassic of Patagonia: New insights on the phylogeny and biogeography of Gondwanan rhynchocephalians". Zoological Journal of the Linnean Society. 166 (2): 342. doi:10.1111/j.1096-3642.2012.00837.x. hdl:20.500.12110/paper_00244082_v166_n2_p342_Apesteguia.
24. Sterli, J.; Pol, D.; Rougier, G.; Rauhut, O.; Baez, A.; Carballido, J.; Nicoli, L. (2010). "Nuevos aportes a la diversidad taxonómica de vertebrados de la Formación Cañadón Asfalto (Jurásico Medio) de la provincia del Chubut, Argentina". IV Simposio del Jurásico y sus Límites, Bahía Blanca, Argentina. 4 (1): 22. Retrieved 2 August 2022.
25. Codorniú, L.; Carabajal, A.P.; Pol, D.; Unwin, D.; Rauhut, O.W.M (2016). "A Jurassic pterosaur from Patagonia and the origin of the pterodactyloid neurocranium". PeerJ. 4: e2311. doi:10.7717/peerj.2311. PMC 5012331. PMID 27635315.
26. Rauhut, O.W.M. (2005). "Osteology and relationships of a new theropod dinosaur from the Middle Jurassic of Patagonia". Palaeontology. 48 (1): 87–110. Bibcode:2005Palgy..48...87R. doi:10.1111/j.1475-4983.2004.00436.x.
27. Unwin, D. M.; Rauhut, O. W. M.; Haluza, A. (2004). "The first "rhamphorhynchoid" from South America and the early history of pterosaurs". Geobiologie. 74 (4): 235–237. Retrieved 17 April 2023.
28. Gomez, K. L. (2023). "Diversidad, evolución y diversificación temprana de los Eusaurópodos basales durante el Jurásico Temprano-Medio en Patagonia". Tesis de Postgrado: 1–645. Retrieved 28 May 2023.
29. Ezcurra, M. D.; Pol, D. (2009). "Theropod remains from a new bone–bed of the Cañadón Asfalto Formation (Middle Jurassic), Chubut Province, Argentina". XXIV Jornadas Argentinas de Paleontología de Vertebrados, San Rafael, Mendoza, Argentina. 14 (1): 31. Retrieved 28 May 2023.
30. Oliver W. M. Rauhut; Diego Pol (2019). "Probable basal allosauroid from the early Middle Jurassic Cañadón Asfalto Formation of Argentina highlights phylogenetic uncertainty in tetanuran theropod dinosaurs". Scientific Reports. 9 (1): Article number 18826. Bibcode:2019NatSR...918826R. doi:10.1038/s41598-019-53672-7. PMC 6906444. PMID 31827108.
31. Castiblanco Ramírez, P. M. (2016). "Estudio de la diversidad taxonómica de dinosaurios terópodos de la formación cañadón asfalto, en la provincia del Chubut, Argentina, a partir de un análisis morfométrico de sus dientes" (PDF). Tesis Propuesta Como Cumplimiento de los Requisitos Para el Pregrado de Geociencias, Universidad de los Andes. 1 (1): 1–41. Retrieved 1 August 2022.
32. Pradelli, L. A.; Pol, D.; Ezcurra, M. D. (2022). "Restos de Theropoda (Averostra: Ceratosauria) aumentan la diversidad taxonómica del grupo en la Formación Cañadón Asfalto (Jurásico Temprano), provincia del Chubut, Argentina". XXXV Jornadas Argentinasde Paleontología de Vertebrados. XXXV (1): 54. Retrieved 6 March 2023.
33. Novas, Fernando (2009). The Age of Dinosaurs in South America. Indiana University Press. p. 118. ISBN 978-0253352897.
34. Diego Pol & Oliver W. M. Rauhut (2012). "A Middle Jurassic abelisaurid from Patagonia and the early diversification of theropod dinosaurs". Proceedings of the Royal Society B: Biological Sciences. 279 (1804): 3170–5. doi:10.1098/rspb.2012.0660. PMC 3385738. PMID 22628475.
35. Rauhut, O. W. (2007). "A fragmentary theropod skull from the Middle Jurassic of Patagonia". Ameghiniana. 44 (2): 479–483. Retrieved 11 July 2023.
36. Rauhut, O. W. (2004). "Braincase structure of the Middle Jurassic theropod dinosaur Piatnitzkysaurus". Canadian Journal of Earth Sciences. 41 (9): 1109–1122. Bibcode:2004CaJES..41.1109R. doi:10.1139/e04-053. Retrieved 1 August 2022.
37. "Table 4.1," in Weishampel, et al. (2004). Page 72.
38. Leonardi, G. (1994). "Annotated Atlas of South America Tetrapod Footprints (Devonian to Holocene) with an Appendix on Mexico and Central America". Journal of Vertebrate Paleontology. Brasília: República Federativa do Brasil, Ministério de Minas e Energia, Secretaria de Minas e Metalurgia, Companhia de Pesquisa de Recursos Minerais. 16 (3): 599. doi:10.1080/02724634.1996.10011348. Retrieved 10 August 2022.
39. D. Pol; J. Ramezani; K. Gomez; J. L. Carballido; A. Paulina Carabajal; O. W. M. Rauhut; I. H. Escapa; N. R. Cúneo (2020). "Extinction of herbivorous dinosaurs linked to Early Jurassic global warming event". Proceedings of the Royal Society B: Biological Sciences. 287 (1939): Article ID 20202310. doi:10.1098/rspb.2020.2310. PMC 7739499. PMID 33203331. S2CID 226982302.
40. Holwerda, F. M.; Pol, D.; Rauhut, O. W. (2015). "Using dental enamel wrinkling to define sauropod tooth morphotypes from the Cañadón Asfalto Formation, Patagonia, Argentina". PLOS ONE. 10 (2): e0118100. Bibcode:2015PLoSO..1018100H. doi:10.1371/journal.pone.0118100. PMC 4333578. PMID 25692466.
41. Holwerda, F. M. (2019). "Revision of basal sauropods from the Middle Jurassic of Patagonia and the early evolution of sauropods" (PDF). (Doctoral dissertation, lmu) Ludwig- Maximilians-Universität München. 2 (1): 1–250. Retrieved 1 August 2022.
42. Rahut, O.W.M. (2003). "A Dentary of Patagosaurus (Sauropoda) from the Middle Jurassic of Patagonia". Ameghiniana. 40 (3): 425–432. ISSN 0002-7014.
43. Holwerda, F. M.; Rauhut, O. W.; Pol, D. (2021). "Osteological revision of the holotype of the Middle Jurassic sauropod dinosaur Patagosaurus fariasi Bonaparte, 1979 (Sauropoda: Cetiosauridae)". Geodiversitas. 43 (16): 575–643. doi:10.5252/geodiversitas2021v43a16. S2CID 237537773.
44. Becerra, M. G.; Carballido, J. L.; Pol, D. (2016). "Primer registro de un Sauropoda no-Eusauropoda del Toarciano bajo-medio de Cañadón Asfalto[First report of a non-Eusauropoda Sauropoda from the lower-middle Toarcian of Cañadón Asfalto]". XXX Jornadas Argentinas de Paleontología de Vertebrados. Resúmenes. Ameghiniana. 53 (6): 8. Retrieved 31 March 2022.
45. Becerra, M. G.; Gomez, K. L.; Pol, D. (2017). "A sauropodomorph tooth increases the diversity of dental morphotypes in the Cañadón Asfalto Formation (Early–Middle Jurassic) of Patagonia". Comptes Rendus Palevol. 16 (8): 832–840. Bibcode:2017CRPal..16..832B. doi:10.1016/j.crpv.2017.08.005. Retrieved 2 August 2022.
46. Carballido, J. L.; Holwerda, F. M.; Pol, D.; Rauhut, O. W. (2017). "An Early Jurassic sauropod tooth from Patagonia (Cañadón Asfalto Formation): implications for sauropod diversity". Publicación Electrónica de la Asociación Paleontológica Argentina. 17 (2): 50–57. Retrieved 31 March 2022.
47. Becerra, M. G. (2016). "Dinosaurios ornitisquios de la Formación Cañadón Asfalto (Jurásico temprano a medio), Chubut, Argentina: anatomía y relaciones filogenéticas" (PDF). (Doctoral Dissertation, Universidad de Buenos Aires. Facultad de Ciencias Exactas y Naturales).: 1–649. Retrieved 15 October 2021.
48. Pol, D.; Rauhut, O.W.M.; Becerra, M. (2011). "A Middle Jurassic heterodontosaurid dinosaur from Patagonia and the evolution of heterodontosaurids". Naturwissenschaften. 98 (5): 369–379. Bibcode:2011NW.....98..369P. doi:10.1007/s00114-011-0780-5. PMID 21452054. S2CID 22636871.
49. Becerra, M.C.; Pol, D.; Rauhut, O.W.M.; Cerda, I.A. (2016). "New heterodontosaurid remains from the Cañadón Asfalto Formation: cursoriality and the functional importance of the pes in small heterodontosaurids". Journal of Paleontology. 90 (3): 555–577. doi:10.1017/jpa.2016.24. S2CID 56436933.
50. Gaetano, L. C.; Rougier, G. W. (2012). "First amphilestid from South America: a molariform from the Jurassic Cañadón Asfalto Formation, Patagonia, Argentina". Journal of Mammalian Evolution. 19 (4): 235–248. doi:10.1007/s10914-012-9194-1. hdl:11336/68489. S2CID 254698557. Retrieved 1 August 2022.
51. Gaetano, L.C.; Rougier, G.W. (2011). "New materials of Argentoconodon fariasorum (Mammaliaformes, Triconodontidae) from the Jurassic of Argentina and its bearing on triconodont phylogeny". Journal of Vertebrate Paleontology. 31 (4): 829–843. Bibcode:2011JVPal..31..829G. doi:10.1080/02724634.2011.589877. hdl:11336/68497. S2CID 85069761. Retrieved 1 August 2022.
52. Martin, T.; Rauhut, O. W. (2005). "Mandible and dentition of Asfaltomylos patagonicus (Australosphenida, Mammalia) and the evolution of tribosphenic teeth". Journal of Vertebrate Paleontology. 25 (2): 414–425. doi:10.1671/0272-4634(2005)025[0414:MADOAP]2.0.CO;2. S2CID 86312639. Retrieved 1 August 2022.
53. Rougier, G. W.; Martinelli, A. G.; Forasiepi, A. M.; Novacek, M. J. (2007). "New Jurassic mammals from Patagonia, Argentina: a reappraisal of australosphenidan morphology and interrelationships". American Museum Novitates (3): 1–54. CiteSeerX 10.1.1.693.6352. Retrieved 1 August 2022.
54. Olivera, D. E.; Quattrocchio, M. E.; Zavattieri, A. M. (2015). "The fungal spore Annella capitata Srivastava from the Jurassic (Late Toarcian–Late Bajocian) Cañadón Asfalto Formation of Patagonia, Argentina" (PDF). Palynology. 39 (2): 258–269. Bibcode:2015Paly...39..258O. doi:10.1080/01916122.2014.955616. hdl:11336/6627. S2CID 130822113. Retrieved 29 July 2022.
55. Olivera, D. E.; Zavattieri, A. M.; Quattrocchio, M. E. (2015). "The palynology of the Cañadón Asfalto formation (Jurassic), Cerro Cóndor depocentre, Cañadón Asfalto Basin, Patagonia, Argentina: palaeoecology and palaeoclimate based on ecogroup analysis". Palynology. 39 (3): 362–386. Bibcode:2015Paly...39..362O. doi:10.1080/01916122.2014.988382. hdl:11336/47675. S2CID 129591727. Retrieved 4 September 2023.
56. Hunter, M. A.; Riley, T. R.; Cantrill, D. J.; Flowerdew, M. J.; Millar, I. L. (2006). "A new stratigraphy for the Latady Basin, Antarctic Peninsula: Part 1, Ellsworth land volcanic group" (PDF). Geological Magazine. 143 (6): 777–796. Bibcode:2006GeoM..143..777H. doi:10.1017/S0016756806002597. S2CID 130465133. Retrieved 5 September 2022.
57. Volkheimer, W.; Quattrocchio, M.; Cabaleri, N.; García, V. (2011). "Palynology and paleoenvironment of the Jurassic lacustrine Cañadón Asfalto Formation at Cañadón Lahuincó locality, Chubut Province, Central Patagonia, Argentina". Revista Española de Micropaleontología. 40 (1–2): 77–96. ISSN 0556-655X.
58. Escapa, I.H. (2009). "La tafoflora de la Formación Cañadón Asfalto, Jurasico Medio superior de Chubut. Taxonomía, bioestratigrafia y paleofitogeografia". PhD Thesis. Universidad del Comahue, Bariloche.
59. Escapa, Ignacio H.; Elgorriaga, Andres; Nunes, Giovanni Cristián; Cunéo, Rubèn; Scasso, Roberto A (2021). "Megafloras del Jurásico en la Cuenca de Cañadón Asfalto: Biomas en transformación". In book: Relatorio XXI Congreso Geológico Argentino - Geología y Recursos Naturales de la Provincia del ChubutPublisher: Asociación Geológica Argentina. 21 (6): 887–890. Retrieved 8 September 2022.
60. Elgorriaga, A.; Escapa, I.; Cuneo, R. (2016). "Peltaspermales from the Jurassic of Canadón Asfalto Basin. In Chubut Province, Argentina". Boletın de la Asociacion Latinoamericana de Paleobotanica y Palinologıa: XIV International Palynological Congress–X International Organisation of Palaeobotany Conference. 16 (1): 203–204. Retrieved 22 July 2023.
61. Sender, L.M.; Escapa, I.H.; Elgorriaga, A.; Cúneo, R.; Scasso, R.A. (2016). "Diversidad macroflorísticadel yacimiento 'Pomelo' (Toarciano-Aaleniano) en el área de Cerro Cóndor (Chubut, Argentina)". VI Simposio Argentino del Jurásico. 6 (37).
62. Elgorriaga, A.; Escapa, I.; Cúneo, N. R. (2019). "Relictual Lepidopteris (Peltaspermales) from the Early Jurassic Cañadón Asfalto Formation, Patagonia, Argentina". International Journal of Plant Sciences. 180 (6): 578–596. doi:10.1086/703461. S2CID 195435840. Retrieved 27 December 2021.
63. Contreras, D.L.; Escapa, I.; Cúneo, N. R.; Iribarren, R. C. (2019). "Reconstructing the early evolution of the cupressaceae: A whole-plant description of a new austrohamia species from the cañadón asfalto formation (early Jurassic), Argentina". International Journal of Plant Sciences. 180 (8): 834–868. doi:10.1086/704831. S2CID 202862782. Retrieved 27 December 2021.
64. Bodnar, J.; Escapa, I.; Cúneo, N. R.; Gnaedinger, S. (2013). "First Record of Conifer Wood from the Cañadón Asfalto Formation (Early-Middle Jurassic), Chubut Province, Argentina". Ameghiniana. 50 (2): 227–239. doi:10.5710/AMGH.26.04.2013.620. hdl:11336/3391. S2CID 130814427. Retrieved 27 December 2021.
65. Hofmann, Christa-Ch.; Odgerel, Nyamsambuu; Seyfullah, Leyla J. (2021). "The occurrence of pollen of Sciadopityaceae Luerss. through time". Fossil Imprint. 77 (2): 271–281. doi:10.37520/fi.2021.019. S2CID 245555379. Retrieved 27 December 2021.