Species: ultimus (YOUNG, 1964) CRUICKSHANK, 1970 (nomen dubium)
Etymology: Latin, ultimus, "last, latest."
= Chasmatosaurus ultimus YOUNG, 1964 (nomen dubium)

Holotype: IVPP V 2301

Locality: Shihpienkou, Louzeyu, Wuhsinag County, Shanxi Province, China.

Horizon: Upper Ermaying Formation.

Biostratigraphy:

Age: Anisian Stage, Lower Middle Triassic Epoch, Middle Triassic.

Material: Incomplete anterior part of skull with lower jaws, including fragments of premaxillae, maxillae (both incomplete), probably anterior-most part of left jugal, vomers, anterior-most parts of pterygoids, palatines, left ectopterygoid, dentaries (right one substantially incomplete), splenials, part of left coronoid, and anterior tips of left angular and surangular.

Referred material:

= Chasmatosaurus yuani YOUNG, 1958 (partim)

Locality: Lutzeyu, Wuhsiang Province, China.

Horizon:

Biostratigraphy:

Age: Lower part of Middle Triassic or upper part of Early Triassic.

Material:

IVPP V 2301: Anterior portion of skull.

_____________________________________________________________________________________

Species: goweri EZCURRA & BUTLER, 2015
Etymology: In honor of David J. Gower, in recognition of his contributions to the study and knowledge of proterosuchian archosauriforms.

Holotype: QR 880/C. 500 (Paratype of = Chasmatosaurus alexanderi HOFFMAN, 1965)

Locality: Kruisvlei 279, Marquard, east of Winburg, Lejweleputswa District, Free State Province, South Africa.

Horizon: Upper Balfour Formation or Lower Katberg Formation, Beaufort Group.

Biostratigraphy: Lower Lystrosaurus Assemblage zone.

Age: Induan-?early Olenkian, Early Scythian Epoch, Early Triassic.

Material: Fragmentary skull with snout damaged, and missing the lower jaw.