Thalattosuchia is a clade of marine crocodylomorphs from the Early Jurassic to the Early Cretaceous that had a cosmopolitan distribution.[4] They are colloquially referred to as marine crocodiles or sea crocodiles, though they are not members of Crocodilia and records from Thailand and China suggest that some members lived in freshwater.[5] The clade contains two major subgroupings, the Teleosauroidea and Metriorhynchoidea. Teleosauroids are not greatly specialised for oceanic life, with back osteoderms similar to other crocodyliformes. Within Metriorhynchoidea, the Metriorhynchidae displayed extreme adaptions for life in the open ocean, including the transformation of limbs into flippers, the development of a tail fluke, and smooth, scaleless skin.[6]
The term Thalattosuchia was coined by Fraas in 1901.[1] Various authors considered Thalattosuchia an infraorder or a suborder within "Mesosuchia". However, the term "Mesosuchia" is a paraphyletic group, and as such is no longer used. For consistency, the Thalattosuchia are here placed at suborder rank, although the order that contains it is unnamed. The exact phylogenetic position of Thalattosuchia is uncertain, with them either being interpreted as members of Neosuchia or basal members of Crocodylomorpha, with the similarities to neosuchians possibly being due to convergence.[7] Since Buffetaut (1982) demonstrated the shared characteristics of the early forms of Metriorhynchidae and Teleosauridae, Thalattosuchia has consisted of these two families.[8]
The oldest records of thalattosuchians date to the Sinemurian and Pliensbachian stages, represented by indeterminate remains from Argentina, Chile, and India.[9] The latest records date to the Early Cretaceous.[10] Some of the early members of Teleosauridae have been discovered in non-marine deposits. The systematics of the genus Pelagosaurus are confused, with differencing topologies placing it as either a teleosaurid,[11] or as the sister taxon to a Teleosauridae + Metriorhynchoidea clade. Others considered Pelagosaurus to be a basal metriorhynchoid.[8]
^ abFraas E. 1901. Die Meerkrokodile (Thalattosuchia n. g.) eine neue Sauriergruppe der Juraformation. Jahreshefte des Vereins für vaterländische Naturkunde, Württemberg57: 409-418.
^Fitzinger LJFJ. 1843. Systema Reptilium. Wien: Braumüller et Seidel, 106 pp.
^Wilberg, E. W.; Godoy, P. L.; Griffiths, E. F.; Turner, A. H.; Benson, R. B. J. (2023). "A new early diverging thalattosuchian (Crocodylomorpha) from the Early Jurassic (Pliensbachian) of Dorset, U.K. and implications for the origin and evolution of the group". Journal of Vertebrate Paleontology. e2161909. doi:10.1080/02724634.2022.2161909.
^Alfio A. Chiarenza, Davide Foffa, Mark T. Young, Gianni Insacco, Andrea Cau, Giorgio Carnevale, Rita Catanzariti (2015). "The youngest record of metriorhynchid crocodylomorphs, with implications for the extinction of Thalattosuchia". Cretaceous Research. 56: 608–616. doi:10.1016/j.cretres.2015.07.001. hdl:2318/1537833.{{cite journal}}: CS1 maint: uses authors parameter (link)
^Martin, Jeremy E.; Suteethorn, S.; Lauprasert, K. (February 2019). "A new freshwater teleosaurid from the Jurassic of northeastern Thailand" (PDF). Journal of Vertebrate Paleontology. 64 (2): 239–260. doi:10.1080/02724634.2018.1549059. S2CID 91988192.
^Wilberg, Eric W. (2015-07-01). "What's in an Outgroup? The Impact of Outgroup Choice on the Phylogenetic Position of Thalattosuchia (Crocodylomorpha) and the Origin of Crocodyliformes". Systematic Biology. 64 (4): 621–637. doi:10.1093/sysbio/syv020. ISSN 1076-836X. PMID 25840332.
^ abBuffetaut, E. 1982. Radiation évolutive, paléoécologie et biogéographie des Crocodiliens mésosuchienes. Mémoires Societé Geologique de France142: 1–88.
^Young, Mark T.; Sachs, Sven (2021-09-02). "Evidence of thalattosuchian crocodylomorphs in the Portland Stone Formation (Late Jurassic) of England, and a discussion on Cretaceous teleosauroids". Historical Biology. 33 (9): 1473–1476. doi:10.1080/08912963.2019.1709453. ISSN 0891-2963. S2CID 213426116.
^Gasparini Z, Pol D, Spalletti LA. 2006. An unusual marine crocodyliform from the Jurassic-Cretaceous boundary of Patagonia. Science311: 70-73.
Further reading
Fraas, E. (1902). "Die Meer-Krocodilier (Thalattosuchia) des oberen Jura unter specieller Berücksichtigung von Dacosaurus und Geosaurus". Paleontographica49: 1-72.
External links
"Ancient ocean-going crocodiles mimicked whales and dolphins" at The Guardian, 20 Apr 2020
January 31, 2023
thalattosuchia, clade, marine, crocodylomorphs, from, early, jurassic, early, cretaceous, that, cosmopolitan, distribution, they, colloquially, referred, marine, crocodiles, crocodiles, though, they, members, crocodilia, records, from, thailand, china, suggest. Thalattosuchia is a clade of marine crocodylomorphs from the Early Jurassic to the Early Cretaceous that had a cosmopolitan distribution 4 They are colloquially referred to as marine crocodiles or sea crocodiles though they are not members of Crocodilia and records from Thailand and China suggest that some members lived in freshwater 5 The clade contains two major subgroupings the Teleosauroidea and Metriorhynchoidea Teleosauroids are not greatly specialised for oceanic life with back osteoderms similar to other crocodyliformes Within Metriorhynchoidea the Metriorhynchidae displayed extreme adaptions for life in the open ocean including the transformation of limbs into flippers the development of a tail fluke and smooth scaleless skin 6 ThalattosuchiansTemporal range Sinemurian Early Aptian 190 125 Ma PreꞒ Ꞓ O S D C P T J K Pg NPlatysuchus Teleosauridae Teleosauroidea Cricosaurus Metriorhynchidae Metriorhynchoidea Scientific classificationKingdom AnimaliaPhylum ChordataClass ReptiliaClade PseudosuchiaSuperorder CrocodylomorphaClade SolidocraniaSuborder ThalattosuchiaFraas 1901 1 Superfamilies Metriorhynchoidea 2 Teleosauroidea Turnersuchus 3 Contents 1 Discovery and naming 2 See also 3 References 4 Further reading 5 External linksDiscovery and naming Edit Life restoration of Metriorhynchus brevirostris Metriorhynchidae Life restoration of Machimosaurus Machimosauridae Teleosauroidea The term Thalattosuchia was coined by Fraas in 1901 1 Various authors considered Thalattosuchia an infraorder or a suborder within Mesosuchia However the term Mesosuchia is a paraphyletic group and as such is no longer used For consistency the Thalattosuchia are here placed at suborder rank although the order that contains it is unnamed The exact phylogenetic position of Thalattosuchia is uncertain with them either being interpreted as members of Neosuchia or basal members of Crocodylomorpha with the similarities to neosuchians possibly being due to convergence 7 Since Buffetaut 1982 demonstrated the shared characteristics of the early forms of Metriorhynchidae and Teleosauridae Thalattosuchia has consisted of these two families 8 The oldest records of thalattosuchians date to the Sinemurian and Pliensbachian stages represented by indeterminate remains from Argentina Chile and India 9 The latest records date to the Early Cretaceous 10 Some of the early members of Teleosauridae have been discovered in non marine deposits The systematics of the genus Pelagosaurus are confused with differencing topologies placing it as either a teleosaurid 11 or as the sister taxon to a Teleosauridae Metriorhynchoidea clade Others considered Pelagosaurus to be a basal metriorhynchoid 8 See also EditList of thalattosuchian bearing stratigraphic units List of marine reptilesReferences Edit a b Fraas E 1901 Die Meerkrokodile Thalattosuchia n g eine neue Sauriergruppe der Juraformation Jahreshefte des Vereins fur vaterlandische Naturkunde Wurttemberg 57 409 418 Fitzinger LJFJ 1843 Systema Reptilium Wien Braumuller et Seidel 106 pp Wilberg E W Godoy P L Griffiths E F Turner A H Benson R B J 2023 A new early diverging thalattosuchian Crocodylomorpha from the Early Jurassic Pliensbachian of Dorset U K and implications for the origin and evolution of the group Journal of Vertebrate Paleontology e2161909 doi 10 1080 02724634 2022 2161909 Alfio A Chiarenza Davide Foffa Mark T Young Gianni Insacco Andrea Cau Giorgio Carnevale Rita Catanzariti 2015 The youngest record of metriorhynchid crocodylomorphs with implications for the extinction of Thalattosuchia Cretaceous Research 56 608 616 doi 10 1016 j cretres 2015 07 001 hdl 2318 1537833 a href Template Cite journal html title Template Cite journal cite journal a CS1 maint uses authors parameter link Martin Jeremy E Suteethorn S Lauprasert K February 2019 A new freshwater teleosaurid from the Jurassic of northeastern Thailand PDF Journal of Vertebrate Paleontology 64 2 239 260 doi 10 1080 02724634 2018 1549059 S2CID 91988192 Spindler Frederik Lauer Rene Tischlinger Helmut Mauser Matthias 2021 07 05 The integument of pelagic crocodylomorphs Thalattosuchia Metriorhynchidae Palaeontologia Electronica 24 2 1 41 doi 10 26879 1099 ISSN 1094 8074 Wilberg Eric W 2015 07 01 What s in an Outgroup The Impact of Outgroup Choice on the Phylogenetic Position of Thalattosuchia Crocodylomorpha and the Origin of Crocodyliformes Systematic Biology 64 4 621 637 doi 10 1093 sysbio syv020 ISSN 1076 836X PMID 25840332 a b Buffetaut E 1982 Radiation evolutive paleoecologie et biogeographie des Crocodiliens mesosuchienes Memoires Societe Geologique de France 142 1 88 Bardet N Falconnet J Fischer V Houssaye A Jouve S Pereda Suberbiola X Perez Garcia A Rage J C Vincent P November 2014 Mesozoic marine reptile palaeobiogeography in response to drifting plates Gondwana Research 26 3 4 869 887 Bibcode 2014GondR 26 869B doi 10 1016 j gr 2014 05 005 ISSN 1342 937X Young Mark T Sachs Sven 2021 09 02 Evidence of thalattosuchian crocodylomorphs in the Portland Stone Formation Late Jurassic of England and a discussion on Cretaceous teleosauroids Historical Biology 33 9 1473 1476 doi 10 1080 08912963 2019 1709453 ISSN 0891 2963 S2CID 213426116 Gasparini Z Pol D Spalletti LA 2006 An unusual marine crocodyliform from the Jurassic Cretaceous boundary of Patagonia Science 311 70 73 Further reading EditFraas E 1902 Die Meer Krocodilier Thalattosuchia des oberen Jura unter specieller Berucksichtigung von Dacosaurus und Geosaurus Paleontographica 49 1 72 External links Edit Ancient ocean going crocodiles mimicked whales and dolphins at The Guardian 20 Apr 2020 Retrieved from https en wikipedia org w index php title Thalattosuchia amp oldid 1136175451, wikipedia, wiki, book, books, library,
