Pseudochampsa ischigualastensis

Pseudochampsa Temporal range: Late Triassic, 229 Ma PreЄ Є O S D C P T J K Pg N ↓
Holotype skeleton
Scientific classification
Kingdom:	Animalia
Phylum:	Chordata
Class:	Reptilia
Family:	†Proterochampsidae
Subfamily:	†Rhadinosuchinae
Genus:	†Pseudochampsa Trotteyn & Ezcurra, 2014
Type species
†Pseudochampsa ischigualastensis (Trotteyn et al., 2012 [originally Chanaresuchus])

Pseudochampsa is an extinct genus of proterochampsid archosauriform known from the Late Triassic Ischigualasto Formation of San Juan Province, northwestern Argentina. It contains a single species, Pseudochampsa ischigualastensis, originally named as a second species of the closely related Chanaresuchus, based on a fairly complete articulated skeleton and skull. A revision of the remains concluded that it was best to move to species to its own genus, as no traits were found to unite P. ischigualastensis and the type species of Chanaresuchus to the exclusion of other proterochampsids. A phylogenetic analysis places both species in a polytomy with Gualosuchus as the most advanced members of Proterochampsia.

Pseudochampsa is known solely from the holotype PVSJ 567, a nearly complete and articulated individual housed at the División de Paleontologia de Vertebrados del Museo de Ciencias Naturales y Universidad Nacional de San Juan, Argentina. The holotype consists of a skull with fully occluded lower jaws, a complete vertebral column lacking the outer half of the tail, several neck and back ribs, some haemal arches, some gastralia, the pectoral girdle, both partially preserved humeri, a partial pelvic girdle, and both nearly complete hind-limbs including both femora, tibiae, fibulae, tarsals and feet. PVSJ 567 was found at Valle Pintado, Hoyada de Ischigualasto of the Ischigualasto Provincial Park, San Juan Province. It was collected from the Cancha de Bochas Member of the Ischigualasto Formation, of Ischigualasto-Villa Union Basin, dating to the late Carnian to earliest Norian stages of the middle Late Triassic.