Lewisuchus is a genus of archosaur that lived during the Late Triassic (early Carnian).[1] As a silesaurid dinosauriform, it was a member of the group of reptiles most commonly considered to be the closest relatives of dinosaurs (possibly true dinosaurs themselves).[2][3][4][5][6]Lewisuchus was about 1 metre (3.3 ft) long. Fossils have been found in the Chañares Formation of Argentina.[7] It exhibited osteoderms along its back.[8]
^Ezcurra, Martín D.; Fiorelli, Lucas E.; Martinelli, Agustín G.; Rocher, Sebastián; von Baczko, M. Belén; Ezpeleta, Miguel; Taborda, Jeremías R. A.; Hechenleitner, E. Martín; Trotteyn, M. Jimena; Desojo, Julia B. (October 2017). "Deep faunistic turnovers preceded the rise of dinosaurs in southwestern Pangaea". Nature Ecology & Evolution. 1 (10): 1477–1483. doi:10.1038/s41559-017-0305-5. hdl:11336/41466. ISSN 2397-334X. PMID 29185518. S2CID 256707805.
^Müller, Rodrigo Temp; Garcia, Maurício Silva (August 2020). "A paraphyletic 'Silesauridae' as an alternative hypothesis for the initial radiation of ornithischian dinosaurs". Biology Letters. 16 (8): 20200417. doi:10.1098/rsbl.2020.0417. ISSN 1744-9561. PMC 7480155. PMID 32842895.
^Müller, Rodrigo T. (April 2021). "A new theropod dinosaur from a peculiar Late Triassic assemblage of southern Brazil". Journal of South American Earth Sciences. 107: 103026. doi:10.1016/j.jsames.2020.103026. S2CID 229432076.
^Garcia, Maurício S.; Müller, Rodrigo T.; Pretto, Flávio A.; Da-Rosa, Átila A. S.; Dias-Da-Silva, Sérgio (2021-01-02). "Taxonomic and phylogenetic reassessment of a large-bodied dinosaur from the earliest dinosaur-bearing beds (Carnian, Upper Triassic) from southern Brazil". Journal of Systematic Palaeontology. 19 (1): 1–37. doi:10.1080/14772019.2021.1873433. ISSN 1477-2019. S2CID 232313141.
^Pacheco, Cristian; Müller, Rodrigo T.; Langer, Max; Pretto, Flávio A.; Kerber, Leonardo; Dias da Silva, Sérgio (2019-11-08). "Gnathovorax cabreirai : a new early dinosaur and the origin and initial radiation of predatory dinosaurs". PeerJ. 7: e7963. doi:10.7717/peerj.7963. ISSN 2167-8359. PMC 6844243. PMID 31720108.
^Cabreira, Sergio Furtado; Kellner, Alexander Wilhelm Armin; Dias-da-Silva, Sérgio; Silva, Lúcio Roberto da; Bronzati, Mario; Marsola, Júlio Cesar de Almeida; Müller, Rodrigo Temp; Bittencourt, Jonathas de Souza; Batista, Brunna Jul’Armando; Raugust, Tiago; Carrilho, Rodrigo (2016-11-21). "A Unique Late Triassic Dinosauromorph Assemblage Reveals Dinosaur Ancestral Anatomy and Diet". Current Biology. 26 (22): 3090–3095. doi:10.1016/j.cub.2016.09.040. ISSN 0960-9822. PMID 27839975.
^Romer, A. S. (11 August 1972). "The Chañares (Argentina) Triassic reptile fauna; XIV, Lewisuchus admixtus, gen. et sp. nov., a further thecodont from the Chañares beds". Breviora. 390: 1–13.
^Bittencourt, Jonathas; Arcucci, Andrea; Marsicano, Claudia; Langer, Max (15 December 2014). "Osteology of the Middle Triassic archosaur Lewisuchus admixtus Romer (Chañares Formation, Argentina), its inclusivity, and relationships amongst early dinosauromorphs". Journal of Systematic Palaeontology. 13 (3): 189–219. doi:10.1080/14772019.2013.878758. hdl:11336/18502. S2CID 56155733.
represented the same species of animal as Lewisuchus admixtus. If this is demonstrated to be the case, the name Lewisuchus would have priority over Pseudolagosuchus...
occupied a variety of ecological niches, with early silesaurids (such as Lewisuchus) being carnivorous and later taxa (such as Kwanasaurus) having adaptations...
Lagosuchus), Pseudolagosuchus (now considered a synonym of the silesaurid Lewisuchus), Dinosauria (including Aves), and all its descendants. This definition...
the Ntawere Formation. The front of the maxilla is similar to that of Lewisuchus and Silesaurus, with a triangular premaxillary facet and thick, sharp...
stipanicicorum, Carroll assigned to Gracilisuchidae the Middle Triassic Lewisuchus admixtus, which is now considered a silesaurid dinosauriform. Turfanosuchus...
(the ankylothecodont condition), like in all silesaurids except possibly Lewisuchus and in non-archosauriform archosauromorphs, but unlike other members of...
more prominent. The rest of the skull generally resembles Silesaurus and Lewisuchus, with some exceptions. The prefrontal is large and has a pronounced lateral...
backwards to contact those of adjacent vertebrae. The contemporary silesaurid Lewisuchus has a similar neural spine morphology, but it possesses osteoderms on...
ornithischians under this reconstruction were faunivorous, as seen by Lewisuchus, which has typical teeth like theropods. Serrations on teeth become larger...
the holotype. It was preserved in a nodule alongside the holotype of Lewisuchus admixtus and a few Lagosuchus bones. MCZ 4121 represents a few vertebrae...
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