Species: brachycephalus OWEN,
Etymology:
= Plesiosaurus brachycephalus OWEN,

Holotype:

Locality: Bintton, Gloucestershire County, England, Southern United Kingdom.

Horizon:

Biostratigraphy: Caenisites turneri zone.

Age: Top of Lower Sinemurian Stage, Lower Lias Epoch, Early Jurassic.

Material: Skull and nearly complete skeleton.