Trachymetopon is an extinct genus of prehistoric coelacanth from the Jurassic of Europe. Fossils have been found in the Early JurassicPosidonia Shale of Germany the Middle JurassicMarnes de Dives of France, and probably the Late Jurassic Kimmeridge Clay of England.[1][2] Only one species has been named, Trachymetopon liassicum, described by Henning in 1951 from an almost complete specimen found in the Lower Toarcian of Ohmden in Baden-Württemberg.[3] Another specimen is known from the same site, and two older specimens come from the Sinemurian of Holzmaden.[4] The holotype of this species is 1.6 metres (5 ft 3 in) in length.[4] A giant specimen of an undetermined species of Trachymetopon found at the Middle Jurassic (Late Callovian) Falaises des Vaches Noires of Normandy. This specimen, composed of a 53 cm long palatoquadrate, belongs to an individual 4 metres (13 ft) in length.[5] A basisphenoid found in a museum in Switzerland that likely originates from the same locaity probably belonged to an individual around 5 m (16 ft) long, making Trachymetoponthe largest of all coelacanths alongside Mawsonia.[1] A study published in 2015 revealed that this coelacanth belongs to the Mawsoniidae.[4]Trachymetopon is one of the few known mawsoniids to have been exclusively marine (with an indeterminate form from the Triassic of France), while most of the other members of the group have lived in fresh and brackish waters.[6]
A phylogenetic analysis of the mawsoniids published in 2020 found a polytomy grouping together Trachymetopon and the Cretaceous genera “Lualabaea”, Axelrodichthys, and Mawsonia. The genus “Lualabaea” could be congeneric with Axelrodichthys.[7]
^Toriño, Pablo; Gausden, Shane F.; Etches, Steve; Rankin, Kathryn; Marshall, John E. A.; Gostling, Neil J. (2022). "An enigmatic large mawsoniid coelacanth (Sarcopterygii, Actinistia) from the Upper Jurassic Kimmeridge Clay Formation of England". Journal of Vertebrate Paleontology. 42 (1). e2125813. Bibcode:2022JVPal..42E5813T. doi:10.1080/02724634.2022.2125813. S2CID 253141244.
^Hennig, E. (1951). Trachymetopon liassicum, Ald., ein Reisen-Crossopterygier aus Schwäbischem Ober-Lias. Neues Jahrbuch für Geologie und Paläontologie, Abhandlungen, Stuttgart, 94, 67-79.
^ abcDutel, H.; Herbin, M.; Clément, G. (2015). "First Occurrence of a Mawsoniid Coelacanth in the Early Jurassic of Europe". Journal of Vertebrate Paleontology. 35 (3): e929581. Bibcode:2015JVPal..35E9581D. doi:10.1080/02724634.2014.929581. S2CID 140557693.
^Dutel, H.; Pennetier, E.; Pennetier, G. (2014). "A Giant Marine Coelacanth from the Jurassic of Normandy, France". Journal of Vertebrate Paleontology. 34 (5): 1239–1242. Bibcode:2014JVPal..34.1239D. doi:10.1080/02724634.2014.838176. S2CID 130632357.
^Deesri, U.; Cavin, L.; Amiot, R.; Bardet, N.; Buffetaut, E.; Cuny, G.; Giner, S.; Martin, J.E.; Suan, G. (2018). "A mawsoniid coelacanth (Sarcopterygii: Actinistia) from the Rhaetian (Upper Triassic) of the Peygros quarry, Le Thoronet (Var, southeastern France)". Geological Magazine. 155 (1): 187–192. Bibcode:2018GeoM..155..187D. doi:10.1017/S0016756817000619. S2CID 134867757.
^Cavin, L.; Buffetaut, E.; Dutour, Y.; Garcia, G.; Le Loeuff, J.; Méchin, A.; Méchin, P.; Tong, H.; Tortosa, T.; Turini, E.; Valentin, X. (2020). "The last known freshwater coelacanths: New Late Cretaceous mawsoniids remains (Osteichthyes: Actinistia) from Southern France". PLOS ONE. 15 (6): e0234183. Bibcode:2020PLoSO..1534183C. doi:10.1371/journal.pone.0234183. PMC7274394. PMID 32502171.
trachymetopon, extinct, genus, prehistoric, coelacanth, from, jurassic, europe, fossils, have, been, found, early, jurassic, posidonia, shale, germany, middle, jurassic, marnes, dives, france, probably, late, jurassic, kimmeridge, clay, england, only, species,. Trachymetopon is an extinct genus of prehistoric coelacanth from the Jurassic of Europe Fossils have been found in the Early Jurassic Posidonia Shale of Germany the Middle Jurassic Marnes de Dives of France and probably the Late Jurassic Kimmeridge Clay of England 1 2 Only one species has been named Trachymetopon liassicum described by Henning in 1951 from an almost complete specimen found in the Lower Toarcian of Ohmden in Baden Wurttemberg 3 Another specimen is known from the same site and two older specimens come from the Sinemurian of Holzmaden 4 The holotype of this species is 1 6 metres 5 ft 3 in in length 4 A giant specimen of an undetermined species of Trachymetopon found at the Middle Jurassic Late Callovian Falaises des Vaches Noires of Normandy This specimen composed of a 53 cm long palatoquadrate belongs to an individual 4 metres 13 ft in length 5 A basisphenoid found in a museum in Switzerland that likely originates from the same locaity probably belonged to an individual around 5 m 16 ft long making Trachymetopon the largest of all coelacanths alongside Mawsonia 1 A study published in 2015 revealed that this coelacanth belongs to the Mawsoniidae 4 Trachymetopon is one of the few known mawsoniids to have been exclusively marine with an indeterminate form from the Triassic of France while most of the other members of the group have lived in fresh and brackish waters 6 TrachymetoponTemporal range Sinemurian Callovian 199 163 5 Ma PreꞒ Ꞓ O S D C P T J K Pg N Possible Kimmeridgian recordTrachymetopon liassicumScientific classificationDomain EukaryotaKingdom AnimaliaPhylum ChordataClade SarcopterygiiClass ActinistiaOrder CoelacanthiformesFamily MawsoniidaeGenus TrachymetoponHennig 1951SpeciesTrachymetopon liasicum Hennig 1951Phylogeny editA phylogenetic analysis of the mawsoniids published in 2020 found a polytomy grouping together Trachymetopon and the Cretaceous genera Lualabaea Axelrodichthys and Mawsonia The genus Lualabaea could be congeneric with Axelrodichthys 7 OutgroupDiplurusParnaibaiaChinleaTrachymetopon liassicum Mawsonia lavocatiMawsoniaAxelrodichthys Lualabaea See also edit nbsp Paleontology portal nbsp Fish portalSarcopterygii List of sarcopterygians List of prehistoric bony fishReferences edit a b Cavin Lionel Piuz Andre Ferrante Christophe Guinot Guillaume 2021 06 03 Giant Mesozoic coelacanths Osteichthyes Actinistia reveal high body size disparity decoupled from taxic diversity Scientific Reports 11 1 11812 Bibcode 2021NatSR 1111812C doi 10 1038 s41598 021 90962 5 ISSN 2045 2322 PMC 8175595 PMID 34083600 Torino Pablo Gausden Shane F Etches Steve Rankin Kathryn Marshall John E A Gostling Neil J 2022 An enigmatic large mawsoniid coelacanth Sarcopterygii Actinistia from the Upper Jurassic Kimmeridge Clay Formation of England Journal of Vertebrate Paleontology 42 1 e2125813 Bibcode 2022JVPal 42E5813T doi 10 1080 02724634 2022 2125813 S2CID 253141244 Hennig E 1951 Trachymetopon liassicum Ald ein Reisen Crossopterygier aus Schwabischem Ober Lias Neues Jahrbuch fur Geologie und Palaontologie Abhandlungen Stuttgart 94 67 79 a b c Dutel H Herbin M Clement G 2015 First Occurrence of a Mawsoniid Coelacanth in the Early Jurassic of Europe Journal of Vertebrate Paleontology 35 3 e929581 Bibcode 2015JVPal 35E9581D doi 10 1080 02724634 2014 929581 S2CID 140557693 Dutel H Pennetier E Pennetier G 2014 A Giant Marine Coelacanth from the Jurassic of Normandy France Journal of Vertebrate Paleontology 34 5 1239 1242 Bibcode 2014JVPal 34 1239D doi 10 1080 02724634 2014 838176 S2CID 130632357 Deesri U Cavin L Amiot R Bardet N Buffetaut E Cuny G Giner S Martin J E Suan G 2018 A mawsoniid coelacanth Sarcopterygii Actinistia from the Rhaetian Upper Triassic of the Peygros quarry Le Thoronet Var southeastern France Geological Magazine 155 1 187 192 Bibcode 2018GeoM 155 187D doi 10 1017 S0016756817000619 S2CID 134867757 Cavin L Buffetaut E Dutour Y Garcia G Le Loeuff J Mechin A Mechin P Tong H Tortosa T Turini E Valentin X 2020 The last known freshwater coelacanths New Late Cretaceous mawsoniids remains Osteichthyes Actinistia from Southern France PLOS ONE 15 6 e0234183 Bibcode 2020PLoSO 1534183C doi 10 1371 journal pone 0234183 PMC 7274394 PMID 32502171 nbsp This article about a prehistoric lobe finned fish is a stub You can help Wikipedia by expanding it vte nbsp This article related to a Jurassic fish is a stub You can help Wikipedia by expanding it vte Retrieved from https en wikipedia org w index php title Trachymetopon amp oldid 1154876919, wikipedia, wiki, book, books, library,
