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List Of Crurotarsans
This list of crurotarsans is a comprehensive listing of all Genus, genera that have ever been included in the clade Crurotarsi, excluding purely vernacular terms. Under some definitions Crurotarsi includes all archosaurs, but this list excludes archosaur genera that are included in Avemetatarsalia (pterosaurs, nonavian dinosaurs, and birds). The list includes all commonly accepted genera, but also genera that are now considered invalid, doubtful (''nomen dubium''), or were not formally published (''nomen nudum''), as well as synonym (zoology), junior synonyms of more established names, and genera that are no longer considered crurotarsan. Extinct taxa are denoted with a dagger (†). The list contains 626 names, of which approximately 537 are considered either valid crurotarsan genera or ''nomina dubia''. Scope and terminology There is no official, canonical list of crurotarsan genera, but one of the most thorough attempts can be found on thCrurotarsi section of Mikko Haaramo's P ... [...More Info...] [...Related Items...] OR: [Wikipedia] [Google] [Baidu] |
Crurotarsan
Crurotarsi is a clade of archosauriform reptiles that includes crocodilians and stem-crocodilians and possibly bird-line archosaurs too if the extinct, crocodile-like phytosaurs are more distantly related to crocodiles than traditionally thought. Prior to 2011, the group had invariably included only archosaurs closer to crocodilians than to birds and other dinosaurs. An equivalent term for the crocodilian side of the archosaur family tree is Pseudosuchia. This traditional definition of Crurotarsi assumed that phytosaurs were crown-group archosaurs and more closely related to crocodilians than to birds. However, a 2011 study argued that the phytosaur lineage evolved prior to the split between birds and crocodilians. This would mean that phytosaurs were not true archosaurs, and therefore could not be considered representatives of croc-line archosaurs. The name Crurotarsi is derived from the Latin word ''crus'' (lower leg) and the Greek word ''tarsos'' (ankle). It refers to the spe ... [...More Info...] [...Related Items...] OR: [Wikipedia] [Google] [Baidu] |
Acaenasuchus
''Acaenasuchus'' (meaning "thorn crocodile") is an extinct genus of pseudosuchians, endemic to what would be Arizona during the Late Triassic, existing for approximately . Discovery and naming The holotype, UCMP 139576 (a left(?) dorsal paramedian scute), was discovered by Charles Lewis Camp in 1930 and was considered to belong to a juvenile of ''Desmatosuchus''.Heckert, A.B. and Lucas, S. G. (2002). ''Acaenasuchus geoffreyi'' (Archosauria: Aetosauria) from the Upper Triassic Chinle Group: Juvenile of ''Desmatosuchus'' ''haplocerus''. ''Upper Triassic Stratigraphy and Paleontology. New Mexico Museum of Natural History and Science Bulletin No. 21''. UCMP 139576 eventually moved into its own taxon, and ''Acaenasuchus'' was named by Long and Murry (1995).R. A. Long and P. A. Murry. (1995). Late Triassic (Carnian and Norian) tetrapods from the southwestern United States. ''New Mexico Museum of Natural History and Science Bulletin'' 4:1-254 The holotype was discovered in the Petrifie ... [...More Info...] [...Related Items...] OR: [Wikipedia] [Google] [Baidu] |
Aetosauroides
''Aetosauroides'' (meaning "'' Aetosaurus''-like") is an extinct genus of aetosaur from the Late Triassic of South America. It is one of four aetosaurs known from South America, the others being '' Neoaetosauroides'', '' Chilenosuchus'' and '' Aetobarbakinoides''. Three species have been named: the type species ''A. scagliai'', ''A. subsulcatus'' and ''A. inhamandensis''. Fossils have been found in the Cancha de Bochas Member of the Ischigualasto Formation in the Ischigualasto-Villa Unión Basin in northwestern Argentina and the Santa Maria Formation in the Paraná Basin in southeastern Brazil. The strata date to the late Carnian and early Norian stages, making ''Aetosauroides'' one of the oldest aetosaurs. Description Most individuals of ''Aetosauroides'' measured around in length, with one large individual reaching (with histology suggesting an age of 23 years). Sexual maturity was probably reached at in length, although these individuals were not yet fully grown. Sexua ... [...More Info...] [...Related Items...] OR: [Wikipedia] [Google] [Baidu] |
Aetobarbakinoides
''Aetobarbakinoides'' is an extinct genus of stagonolepidid aetosaur known from the Late Triassic of Rio Grande do Sul state, southern Brazil. Fossils have been found from the Santa Maria Supersequence of the late Carnian and early Norian stages, making ''Aetobarbakinoides'' one of the oldest aetosaurs. The type species, ''A. brasiliensis'', was named in 2012, and is notable for being described primarily by features of the vertebrae; most other aetosaurs are diagnosed by features in bony plates called osteoderms, which are by far the most common material. Although placed in a basal phylogenetic position among aetosaurs, ''Aetobarbakinoides'' is closely related to both desmatosuchines and typothoracisines, two derived clades of aetosaurs. Discovery ''Aetobarbakinoides'' is known only from the holotype specimen CPE2 168, a partially articulated partial postcranial skeleton which is housed at the Coleção Municipal in São Pedro do Sul. It was found near the city of São P ... [...More Info...] [...Related Items...] OR: [Wikipedia] [Google] [Baidu] |
Steneosaurus
''Steneosaurus'' (from el, στενός , 'narrow' and el, σαῦρος , 'lizard') is a dubious genus of teleosaurid crocodyliform from the Middle or Late Jurassic (Callovian or early Oxfordian) of France. The genus has been used as a wastebasket taxon for thalattosuchian fossils for over two centuries, and almost all known historical species of teleosauroid have been included within it at one point. The genus has remained a wastebasket, with numerous species still included under the label ''‘Steneosaurus’'', many of which are unrelated to each other (either paraphyletic or polyphyletic with respect to each other and other genera of teleosauroids). Discovery and assigned species The type species, ''S. rostromajor'', was only formally recognised as such in 2020, and this revision determined the type specimen of ''Steneosaurus'' was undiagnostic, and so declared the genus ''Steneosaurus'' a ''nomen dubium''. The history of this specimen has been detailed in 2017. It ... [...More Info...] [...Related Items...] OR: [Wikipedia] [Google] [Baidu] |
Aeolodon
''Aeolodon'' is an extinct genus of teleosaurid crocodyliform reptile from the Late Jurassic (Tithonian) of Germany and France that was initially named as a species of ''Crocodylus'' in 1814. Although previously synonymized with '' Steneosaurus'', recent cladistic analysis considers it distantly related to the ''Steneosaurus'' type species and the type species is ''A. priscus'', named in 1830 and described in 2020. The holotype of ''Aeolodon priscus'' was found in the Mörnsheim Formation of Daiting, Bavaria, Germany, in the same quarry that produced the ''Geosaurus giganteus'' holotype and the assigned specimen was discovered in the Canjuers conservation Lagerstätte A Lagerstätte (, from ''Lager'' 'storage, lair' '' Stätte'' 'place'; plural ''Lagerstätten'') is a sedimentary deposit that exhibits extraordinary fossils with exceptional preservation—sometimes including preserved soft tissues. These for ... of Var, France. See also * List of marine reptiles Refer ... [...More Info...] [...Related Items...] OR: [Wikipedia] [Google] [Baidu] |
Aegyptosuchus
''Aegyptosuchus'' ("Egyptian crocodile") is an extinct monospecific genus of aegyptosuchid eusuchian crocodyliform. It was found in the Bahariya Formation of Egypt, which dates back to the Cenomanian age of the Late Cretaceous. The type and only species is ''Aegyptosuchus peyeri''. ''Aegyptosuchus'' is a member of the family Aegyptosuchidae, along with the genus ''Aegisuchus''. Aegyptosuchidae belongs to the clade Eusuchia, and is proposed to be the sister clade to the crown group Crocodylia, which contains all extant (living) crocodilians. The phylogeny A phylogenetic tree (also phylogeny or evolutionary tree Felsenstein J. (2004). ''Inferring Phylogenies'' Sinauer Associates: Sunderland, MA.) is a branching diagram or a tree showing the evolutionary relationships among various biological spec ... can be shown in the cladogram below: References Neosuchians Late Cretaceous crocodylomorphs of Africa Bahariya Formation Fossil taxa described in 1933 Prehist ... [...More Info...] [...Related Items...] OR: [Wikipedia] [Google] [Baidu] |
Aegisuchus
''Aegisuchus'' is an extinct monospecific genus of giant, flat-headed crocodyliform within the family Aegyptosuchidae. It was found in the Kem Kem Formation of southeast Morocco, which dates back to the Cenomanian age of the Late Cretaceous epoch. The type species ''Aegisuchus witmeri'' was named in 2012 by paleontologists Casey Holliday and Nicholas Gardner, who nicknamed it "Shieldcroc" for the shield-like shape of its skull. ''A. witmeri'' is known from a single partial skull including the braincase and skull roof. Description ''Aegisuchus'' is known only from a partial braincase and skull roof cataloged as ROM 54530. It is diagnosed by several autapomorphies, or unique features. At the center of the skull table is a raised and rough-surfaced boss on the parietal bone that is shaped like a circle. On either side of this boss are holes called dorsotemporal fenestrae, and the surrounding bone is relatively smooth. The quadrate bone in the temporal region of the skull has a re ... [...More Info...] [...Related Items...] OR: [Wikipedia] [Google] [Baidu] |
Adzhosuchus
''Adzhosuchus'' is an extinct genus of crocodylomorph in the family Shartegosuchidae. Fossils have been found from southwestern Mongolia that date back to the Late Jurassic The Late Jurassic is the third epoch of the Jurassic Period, and it spans the geologic time from 163.5 ± 1.0 to 145.0 ± 0.8 million years ago (Ma), which is preserved in Upper Jurassic strata.Owen 1987. In European lithostratigraphy, the ... period.Efimov, M. B., Gubin, Y. M. and Kurzanov, S. M. (2000). New primitive crocodile (Crocodylomorpha: Shartegosuchidae) from the Jurassic of Mongolia. ''Paleontological Journal'' 34:238–241. References Late Jurassic crocodylomorphs Late Jurassic reptiles of Asia Prehistoric pseudosuchian genera {{Jurassic-reptile-stub ... [...More Info...] [...Related Items...] OR: [Wikipedia] [Google] [Baidu] |
Adamantinasuchus
''Adamantinasuchus'' is an extinct genus of notosuchian crocodylomorph from and named after the Late Cretaceous Adamantina Formation of Brazil. It is known from only one fossil, holotype UFRJ-DG 107-R, collected by William Nava (hence the specific name ''navae''). The fossil consists of a partial skull, fragmentary limb bones and a few broken vertebrae, and was found 25 km SW of the town of Marilia, near a reservoir dam. ''Adamantinasuchus'' was approximately 60 cm long from nose to tail, and would have only weighed a few kilograms. Features Skull ''Adamantinasuchus'''s skull is quite well preserved; most of the right anterior part is present, along with some of the right posterior part, but the cranium is crushed and the left side of the skull is altogether missing. The right lower jaw is also preserved, along with many of the teeth. The skull is small, only 60 mm long and around 30 mm high, but the elliptical orbits are very large, almost as long as ... [...More Info...] [...Related Items...] OR: [Wikipedia] [Google] [Baidu] |
Adamanasuchus
''Adamanasuchus'' is an extinct genus of aetosaur. Fossils have been found from several localities from the Chinle Group in Arizona and date back to the late Carnian stage of the Late Triassic. ''In:'' Lucas, S. G. and Spielmann, J. A., eds., ''Triassic of the American West''. New Mexico Museum of Natural History & Science, Bulletin 40 p. 241-247 The locality from which it was named after also lends its name to the Adamanian
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Acynodon
''Acynodon'' is an extinct genus of eusuchian crocodylomorph from the Late Cretaceous, with fossils found throughout Southern Europe. Classification The genus ''Acynodon'' contains three species: ''A. iberoccitanus'', ''A. adriaticus'', and ''A. lopezi''. Fossils have been found in France, Spain, Italy, and Romania, dating back to the Santonian and Maastrichtian periods of the Late Cretaceous. When first described in 1997, it was placed within the family Alligatoridae. New findings a decade later led to it being reclassified as a basal globidontan. Recent studies have since resolved ''Acynodon'' as a basal eusuchian crocodylomorph, outside of the Crocodylia crown group, and a close relative to ''Hylaeochampsa''. Description The skull of ''Acynodon'' is extremely brevirostrine; it had a very short and broad snout compared to other known alligatorids. Its dentition was quite derived, with enlarged molariform teeth and a lack of maxillary and dentary caniniform teeth, presumably ... [...More Info...] [...Related Items...] OR: [Wikipedia] [Google] [Baidu] |
