Genus: Caseosaurus HUNT, LUCAS, HECKERT, SULLIVAN & LOCKLEY, 1998
Etymology: In recognition of E. C. Case who discovered the holotype and made substantial contributions to our knowledge of late Triassic tetrapods, and Greek, sauros, "lizard."

Species: crosbyensis HUNT, LUCAS, HECKERT, SULLIVAN & LOCKLEY, 1998
Etymology: In reference to Crosby County, Texas which yielded the holotype.
= Herrerasauria incertae sedis HUNT, SULLIVAN, LUCAS & HECKERT, 1995

Holotype: UMMP 8870

Locality: Crosby County, exact locality unknown, Texas.

Horizon: Tecovas Member, Dockum Formation.

Biostratigraphy:

Age: Carnian Stage, Late Triassic Epoch, Late Triassic.

Material: Right ilium.

Referred material:

= cf. Caseosaurus crosbyensis NESBITT, IRIMIS & PARKER, 2007

Locality: NMMNH locality-3845, Snyder Quarry, Near Ghost Ranch, Rio Arriba County, New Mexico.

Horizon: Petrified Forest Formation, Chinle Group.

Biostratigraphy:

Age: Revueltian, Early Norian Substage, Early Norian Epoch, Middle Late Triassic Epoch, Late Triassic.

Material:

NMMNH P-25995: Partial ilium.