Genus: Koilamasuchus EZCURRA, LECUONA, & MARTINELLI, 2010
Etymology: Latin, koilamus, "cavity, pocket" and Greek, suchos, "crocodile"; in reference to the presence of lateral fossae in teh dorsal vertebral centra.

Species: gonzalezdiazi EZCURRA, LECUONA, & MARTINELLI, 2010
Etymology: In honor of Dr. Emilio F. Gonzalez Diaz for his geological work in the Triassic outcrops of the Mendoza Province, especially in the Puesto Viejo Group, and discoverer of the holotype of Koilamasuchus.

Holotep: MACN-Pv 18119

Locality: Agua de los Burros locality, 35 km south of the city of San Rafael, Mendoza Province, Argentina.

Horizon: Quebrada de Los Fosiles Formation, Puesto Viejo Group.

Biostratigraphy:

Age: Early Triassic.

Material: Very well preserved natural external molds of 3 dorsal vertebrae, at least 6 osteoderms, a dorsal rib, a probable gastralium, a cheveron, a humeru,s a probably radius, an ilium, an incomlete ungual phalanx, 2 metapodial fragments, adn some indeterminate bone fragments.