Genus: Procyclotosaurus WATSON, 1958
Etymology: Greek, pro, "before" + Cyclotosaurus.

Species: stantonensis (WOODWARD, 1904) WATSON, 1958
Etymology: In reference to Stanton, Staffordshire County, England, where the specimen was discovered.
= Capitosaurus stantonensis WOODWARD, 1904
= Cyclotosaurus stantonensis (WOODWARD, 1904) WATSON, 1919
= Stenotosaurus stantonensis (WOODWARD, 1904) SHISHKIN, 1980

Holotype: BMNH R3174

Locality: Stanton, near Uttoxeter, Staffordshire County, England, Southern United Kingdom.

Horizon: Upper Bromsgrove Sandstone, Lower Keuper.

Biostratigraphy:

Age: Ladinian Stage, Upper Mid Triassic Epoch, Late Middle Triassic.

Material: A nearly complete skull roof and parts of the palate.

Referred material:

HUENE, 1908

Locality: Warwick, Warwickshire County, England, Southern United Kingdom.

Horizon: Lower Keuper.

Biostratigraphy:

Age: Late Triassic.

Material:

Number: Not given:

 

= Diadetognathus varvicensis MIALL, 1874 (partim)
Etymology:

Holotype: WARMS Gz.974 (Warwick Museum Gz 35)

Locality: Coten End Quarry and Bromsgrove, SW of Birmingham, Warwickshire County, England, Southern United Kingdom.

Horizon: Bromsgrove Sandstone Formation.

Biostratigraphy:

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

Material: Posterior part of the left ramus.

Referred material:

HUENE, 1908

Locality: Warwick, Warwickshire County, England, Southern United Kingdom.

Horizon: Lower Keuper.

Biostratigraphy:

Age: Late Triassic.

Material:

Number: Not given: