Genus: Lewisuchus ROMER, 1972
Etymology:
= Pseudolagosuchus ARCUCCI, 1987
Etymology: Greek, pseudos, "false" + Lagosuchus.

Species: admixtus ROMER, 1972
Etymology:

Holotype: The collection of the National University of La Rioja Catalogued as PULR 001 (formerly Museo de La Plata 1964-"XI-14-14)

Locality: Los Chanares locality ("Romer's site"), about 4 km north of the mouth of the Chanares River, Talampaya National Park, La Rioja Province, Argentina.

Horizon: Lower part of the  Chanares Formation.

Biostratigraphy:

Age: Ladinian Stage, Upper Mid Triassic Epoch, Late Triassic.

Material: Left maxilla, jugal, postorbital, squamosal, quadrate, anterior portion of dentary, surangular, angular, rightscapulocoracoid, head of right humerus, incomplete left humerus, 8 cervical, and 6 dorsal vertebrae, cervical ribs, dorsal ribs, right femur missing distal end elements of the second and third toes of pes.

Note: Part of an asymmetrical pes belongs to a smaller proterochampsid.

Referred material:

AGNOLIN, EGLI, EZCURRA, LANGER & NOVAS, 2021

PULR-V 111: Partially articulated skeleton composed of complete left postorbital, incomplete left squamosal and quadrate, several presacral vertebrae, (Cv5-D3 and D4-D10), dorsal ribs, left ilium, pubis, ischium, femur, tibia, astragalus and calcaneum.

PULR-V 113: A sacrum articulated to left ilium and proximal region of both pubes, both ischia, adn incomlete left femur and tibia.

 

= Pseudolagosuchus major ARCUCCI, 1987
Etymology: Latin, major, "greater."

Holotype: PVL 4629

Locality: Los Chanares, Department Lavalle, La Rioja Province, Argentina.

Horizon: Los Chanares Formation.

Biostratigraphy:

Age: Ladinian Stage, Upper Mid Triassic Epoch, Late Triassic.

Material: Dorsal centra, ribs, pubis, femur, tibia, fibula, astragalus and calcaneum.

Referred material:

PVL 3454: Distal end of femur, distal end of tibia and fibula, astragalus, incomplete metatarsals, 2 sacral vertebrae and an ilium.

MACN 18954: 3 vertebrae, dorsals, 5 caudals, distal end of femur, distal end of tibia and fibula, astragalus and calcaneum.

UPLR 53: Distal end of tibia and fibula, proximal end of tarsals, and centra.