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Pseudolagosuchus

Description

Lewisuchus is a genus of archosaur that lived during the Middle Triassic (Ladinian); it was a silesaurid dinosauriform, a member of the group of reptiles which led to the dinosaurs. Lewisuchus was about 1 metre (3.3 ft) long. Fossils have been found in the Chañares Formation of Argentina. It exhibited osteoderms along its back.


Source Data
SourceIDLink
Global Biodiversity Information Facility ID (GBIF)9380004https://www.gbif.org/species/9380004
PaleoBioDB ID (PBDB)65485https://paleobiodb.org/classic/checkTaxonInfo?taxon_no=65485
Rankgenus
Taxonomy (GBIF)Life : Animalia : Chordata : Reptilia : Thecodontia : Lagosuchidae : Pseudolagosuchus
Taxonomy (PBDB)Life : Animalia : Chordata : Reptilia : Eosuchia : Silesauridae : Pseudolagosuchus
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
-ArchosauriformesGauthier 1986
-EucrocopodaEzcurra 2016
-Archosauria
informalAvemetatarsaliaBenton 1999
-OrnithodiraGauthier 1986
-DinosauromorphaBenton 1985
-DinosauriformesNovas 1992
-SilesauridaeLanger et al. 2010
genusPseudolagosuchusArcucci 1987
Scientific NamePseudolagosuchus Arcucci, 1987
Name Published InAmeghiniana 24 (1-2)
Opinions (PBDB)
NameRankOpinionEvidenceAuthor
Pseudolagosuchusgenusbelongs to Staurikosauridaestated without evidencePaul, 1988
Pseudolagosuchusgenusbelongs to Lagosuchidaestated without evidenceNovas, 1989
Pseudolagosuchusgenusbelongs to Dinosauromorphastated without evidenceSereno, 1991
Pseudolagosuchusgenusbelongs to Lagosuchidaestated without evidenceOlshevsky, 1991
Pseudolagosuchusgenusbelongs to Dinosauriformesstated without evidenceNovas, 1992
Pseudolagosuchusgenusbelongs to Dinosauromorphastated without evidenceIrmis et al., 2007
Pseudolagosuchusgenusbelongs to Dinosauriformesstated without evidenceMartínez and Alcober, 2009
Pseudolagosuchusgenusbelongs to Silesauridaestated with evidenceNesbitt et al., 2010
Status (PBDB)extinct
Taxon Size (PBDB)2
First Recorded Appearance242 - 237 Ma
Middle Triassic
Last Recorded Appearance242 - 237 Ma
Middle Triassic
Environmentterrestrial (based on Diapsida)
Motilityactively mobile (based on Osteichthyes)
Taphonomyphosphatic (based on Vertebrata)
Primary Reference (PBDB)A. B. Arcucci. 1987. Un nuevo Lagosuchidae (Thecodontia-Pseudosuchia) de la fauna de Los Chañares (Edad Reptil Chañarense, Triasico Medio), La Rioja, Argentina [A new Lagosuchidae (Thecodontia-Pseudosuchia) from Los Chañares fauna (Chanarian Reptile Age, Middle Triassic), La Rioja Province, Argentina]. Ameghiniana 24(1-2):89-94
Wikipediahttps://en.wikipedia.org/wiki/Pseudolagosuchus

Fossil Distribution

Subtaxa

NameStatusCommon Name(s)Fossil OccurrencesOldestYoungest
Pseudolagosuchus major
species
accepted (GBIF)
listed (PBDB)
2242 Ma
Middle Triassic
242 Ma
Middle Triassic

Synonymy List

YearName and Author
1987Pseudolagosuchus Arcucci
1988Pseudolagosuchus Paul p. 244
1989Pseudolagosuchus Novas p. 680
1991Pseudolagosuchus Olshevsky p. 103
1991Pseudolagosuchus Sereno p. 23
1992Pseudolagosuchus Novas p. 59 fig. 6
1996Pseudolagosuchus Novas p. 737 fig. 10
YearName and Author
1997Pseudolagosuchus Arcucci p. 181
2006Pseudolagosuchus Ezcurra p. 657 fig. 3
2007Pseudolagosuchus Irmis et al. p. 361
2009Pseudolagosuchus Martínez and Alcober p. 1
2010Pseudolagosuchus Nesbitt et al. p. 97
2011Pseudolagosuchus Nesbitt
2019Pseudolagosuchus Martz and Small p. 54 fig. 23

References

Arcucci A. B. (1987) Un nuevo Lagosuchidae (Thecodontia-Pseudosuchia) de la fauna de Los Chañares (Edad Reptil Chañarense, Triasico Medio), La Rioja, Argentina [A new Lagosuchidae (Thecodontia-Pseudosuchia) from Los Chañares fauna (Chanarian Reptile Age, Middle Triassic), La Rioja Province, Argentina], Ameghiniana 24 1-2, 89-94
Paul G. S. (1988) , Predatory Dinosaurs of the World. Simon & Schuster, New York, 1-464
Olshevsky G. (1991) A revision of the parainfraclass Archosauria Cope, 1869, excluding the advanced Crocodylia, Mesozoic Meanderings 2, 1-196
Sereno P. C. (1991) Basal archosaurs: phylogenetic relationships and functional implications, Journal of Vertebrate Paleontology Memoir 2 11 4, suppl., 1-53
Ezcurra M. D. (2006) A review of the systematic position of the dinosauriform archosaur Eucoelophysis baldwini Sullivan & Lucas, 1999 from the Upper Triassic of New Mexico, USA, Geodiversitas 28 4, 649-684
Irmis R. B., Nesbitt S. J., et al (2007) A Late Triassic dinosauromorph assemblage from New Mexico and the rise of dinosaurs, Science 317, 358-361
Martínez R. N., Alcober O. A. (2009) A basal sauropodomorph (Dinosauria: Saurischia) from the Ischigualasto Formation (Triassic, Carnian) and the early evolution of Sauropodomorpha, PLoS ONE 4 2 (e4397), 1-12 doi:10.1371/journal.pone.0004397
Nesbitt S. J., Sidor C. A., et al (2010) Ecologically distinct dinosaurian sister group shows early diversification of Ornithodira, Nature 464, 95-98 doi:10.1038/nature08718
Nesbitt S. J. (2011) The early evolution of archosaurs: relationships and the origin of major clades, Bulletin of the American Museum of Natural History 353, 1-292
Martz J. W., Small B. J. (2019) Non-dinosaurian dinosauromorphs from the Chinle Formation (Upper Triassic) of the Eagle Basin, northern Colorado: Dromomeron romeri (Lagerpetidae) and a new taxon, Kwanasaurus williamparkeri (Silesauridae), PeerJ 7, e7551:1-71 doi:10.7717/peerj.7551
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
original work (title/other) - via The Interim Register of Marine and Nonmarine Genera
Ameghiniana 24 (1-2) - 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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