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Eorasaurus

Description

Eorasaurus is an extinct genus of archosauromorph known from the middle Late Permian (late Capitanian or early Wuchiapingian age) of Tatarstan, European Russia. It contains a single species, Eorasaurus olsoni. Eorasaurus was named by Andrey G. Sennikov in 1997. It is known from four specimens representing a single individual, PIN 156/108 through PIN 156/111, out of which PIN 156/109 was designed as the holotype. The material was collected from the Semin Ovrag locality, from the upper Severodvinian Horizon of the Volga River Basin. Sennikov (1997) assigned this genus to Protorosauridae, but Ezcurra et al. (2014) reclassified it as an archosauromorph.


Source Data
SourceIDLink
Global Biodiversity Information Facility ID (GBIF)4818306https://www.gbif.org/species/4818306
PaleoBioDB ID (PBDB)276143https://paleobiodb.org/classic/checkTaxonInfo?taxon_no=276143
Rankgenus
Taxonomy (GBIF)Life : Animalia : Chordata : Reptilia : Eorasaurus
Taxonomy (PBDB)Life : Animalia : Chordata : Reptilia : Eosuchia : Eorasaurus
Taxonomic Status (GBIF)accepted
Classification
(PBDB,GBIF)
RankNameAuthor
-Eukaryota
-OpisthokontaCavalier-Smith 1987
kingdomAnimalia
-TriploblasticaLankester 1877
-NephrozoaJondelius et al. 2002
-DeuterostomiaGrobben 1908
phylumChordataHaeckel 1847
subphylumVertebrataLamarck 1801
superclassGnathostomataGegenbauer 1874
-Osteichthyes
-SarcopterygiiRomer 1955
subclassDipnotetrapodomorpha
subclassTetrapodomorpha
-Tetrapoda
-ReptiliomorphaSäve-Söderbergh 1934
-AnthracosauriaSäve-Söderbergh 1934
-Batrachosauria
-Cotylosauria
-AmniotaHaeckel 1866
-SauropsidaHuxley 1864
classReptiliaLaurenti 1768
subclassEureptilia
-RomeriidaGauthier et al. 1988
-Diapsida
-Eosuchia
-NeodiapsidaBenton 1985
-SauriaGauthier 1984
-Archosauromorpha
-CrocopodaEzcurra 2016
genusEorasaurusSennikov 1997
Scientific NameEorasaurus Sennikov, 1997
Name Published InPaleontol Zh 1, Yanvar'-Fevral'
Opinions (PBDB)
NameRankOpinionEvidenceAuthor
Eorasaurusgenusbelongs to Protorosauridaestated with evidenceSennikov, 1997
Eorasaurusgenusbelongs to Archosauriformesstated with evidenceEzcurra et al., 2014
Eorasaurusgenusbelongs to Crocopodastated with evidenceEzcurra, 2016
Status (PBDB)extinct
Taxon Size (PBDB)2
First Recorded Appearance265 - 254 Ma
Permian
Last Recorded Appearance265 - 254 Ma
Permian
Environmentterrestrial (based on Diapsida)
Motilityactively mobile (based on Osteichthyes)
Taphonomyphosphatic (based on Vertebrata)
Primary Reference (PBDB)A. G. Sennikov. 1997. [An enigmatic reptile from the Upper Permian of the Volga River Basin]. Paleontologicheskii Zhurnal 1997(1):95-103
Wikipediahttps://en.wikipedia.org/wiki/Eorasaurus

Fossil Distribution

Subtaxa

NameStatusCommon Name(s)Fossil OccurrencesOldestYoungest
Eorasaurus olsoni
species
accepted (GBIF)
listed (PBDB)
1265 Ma
Permian
265 Ma
Permian

Synonymy List

YearName and Author
1997Eorasaurus Sennikov
2014Eorasaurus Ezcurra et al.
2016Eorasaurus Ezcurra

References

Sennikov A. G. (1997) [An enigmatic reptile from the Upper Permian of the Volga River Basin], Paleontologicheskii Zhurnal 1997 1, 95-103
Ezcurra M. D., Scheyer T. M., et al (2014) The origin and early evolution of Sauria: reassessing the Permian saurian fossil record and the timing of the crocodile-lizard divergence, PLoS ONE 9 2, e89165
Ezcurra M. D. (2016) The phylogenetic relationships of basal archosauromorphs, with an emphasis on the systematics of proterosuchian archosauriforms, PeerJ 4, e1778
Nomenclator Zoologicus. A list of the names of genera and subgenera in zoology from the tenth edition of Linnaeus, 1758 to the end of 2004. Digitised by uBio from vols. 1-9 of Neave (ed.), 1939-1996 plus supplementary digital-only volume. http://ubio.org/NomenclatorZoologicus (as at 2006). - via The Interim Register of Marine and Nonmarine Genera
as per family - via The Interim Register of Marine and Nonmarine Genera
Paleontol Zh 1, Yanvar'-Fevral' - via The Interim Register of Marine and Nonmarine Genera
Data courtesy of: PBDB: The Paleobiology Database, Creative Commons CC-BY licenced. , GBIF: the Global Biodiversity Information Facility, various licences, iDigBio, various licences, and EOL: The Encyclopedia of Life (Open Data Public Domain). Because fossils are made of minerals too!
 
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