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Poposauridae

Extinct family of reptiles

Extinct family of reptiles

  • Dolichobrachium
  • Poposaurus

Poposauridae is a family of large carnivorous archosaurs which lived alongside dinosaurs during the Late Triassic. They were around 2.5 to long. Poposaurids are known from fossil remains from North and South America. While originally believed to be theropod dinosaurs (they mirrored the theropods in a number of respects, such as features of the skull and bipedal locomotion), cladistic analysis has shown them to be more closely related to crocodiles.

An early cladistic analysis of crocodylotarsan archosaurs included Poposaurus, Postosuchus, Teratosaurus, and Bromsgroveia within Poposauridae. However, later studies found Teratosaurus to be a rauisuchid. All recent phylogenetic analyses place Postosuchus either as a rauisuchid or a prestosuchid.

Genera

GenusStatusAgeLocationDescriptionImages
Nomen dubium.Late TriassicNorth America
Junior synonym.Junior synonym of Poposaurus[[File:Poposaurus langstoni lythrosuchus skeletal.png150px]]
Valid.Late TriassicNorth America.[[File:Poposaurus skeletal composite.png150px]]

References

References

  1. Parrish JM. 1993. Phylogeny of the Crocodylotarsi, with reference to archosaurian and crurotarsan monophyly. ''Journal of Vertebrate Paleontology'' '''13''': 287-308.
  2. Long RA, Murry PA. 1995. Late Triassic (Carnian and Norian) tetrapods from the Southwestern United States. ''New Mexico Museum of Natural History & Science Bulletin'' '''4''': 1-254.
  3. Galton PM, Walker AD. 1996. ''Bromsgroveia'' from the Middle Triassic of England, the earliest record of a poposaurid thecodontian reptile (Archosauria: Rauisuchia). ''Neues Jahrbuch für Geologie und Paläontologie, Abhandlungen'' '''201''' (3): 303-325.
  4. Weinbaum JC, Hungerbühler A. 2007. A revision of ''Poposaurus gracilis'' (Archosauria: Suchia) based on two new specimens from the Late Triassic of the southwestern U.S.A. ''Paläontologische Zeitschrift'' '''81'''(2):131-145.
  5. Gower DJ. 2002. Brain case evolution in suchian archosaurs: evidence from the rauisuchian ''Batrachotomus''. ''Zoological Journal of the Linnean Society'' '''136''': 49-76.
  6. Nesbitt SJ, Norell MA. 2006. Extreme convergence in the body plans of an early suchian (Archosauria) and ornithomimid dinosaurs (Theropoda). ''Proceedings of the Royal Society of London B'' '''273''': 1045–1048.
  7. Nesbitt S. 2007. The anatomy of ''Effigia okeeffeae'' (Archosauria, Suchia), theropod-like convergence, and the distribution of related taxa. ''Bulletin of the American Museum of Natural History'' '''302''': 84 pp.
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poposauroidea late-triassic-first-appearances late-triassic-extinctions pseudosuchian-families
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