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.

Chasmatosaurus ultimus after YOUNG, 1964 (nomen dubium), Holotype: IVPP V 2301: A) maxilla and dentary; B) close up of the jaws.

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.

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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.