Named By: A. S. Romer - 1972.
Synonyms: Pseudolagosuchus major?
Classification: Chordata, Reptilia, Dinosauriformes.
Species: L. admixtus (type).
Size: Roughly about 1 meter long.
Known locations: Argentina - Chaņares Formation.
Time period: Ladinian of the Triassic.
Fossil representation: Partial remains.
Though the name means ‘Lewis’s crocodile’, Lewisuchus is actually a genus of silesaurid dinosauriforme. In simpler terms, Lewisuchus was closely related to the ancestors of the dinosaurs, though probably not an ancestor itself. Lewisuchus was a fairly small and lightly built predator that probably hunted for small animals such as lizards and primitive mammaliaformes.
- The Chaņares (Argentina) Triassic reptile fauna; XIV, Lewisuchus admixtus, gen. et sp. nov., a further thecodont from the Chaņares beds. - Breviora 390:1-13 - A. S. Romer - 1972.
- Ecologically distinct dinosaurian sister group shows early diversification of Ornithodira. - Nature 464(7285):95-8. - Sterling J. Nesbitt, Christian A. Sidor, Randal B. Irmis, Kenneth D. Angielczyk, Roger M. H. Smith & Linda A. Tsuji - 2010.