Species: tenuiceps SWINTON, 1930
Etymology:
Holotype: BMNH R 5488
Locality: Messrs. Greaves, Bull and Lakin’s cement quarry at Harbury, near Leamington spa, Warwickshire County, England, Southern United Kingdom.
Horizon: Rugby Limestone Member, Blue Las Formation, Lias Group.
Biostratigraphy: Schlotheimia angulata Zone.
Age: Upper Hettangian Stage, Lower Lias Epoch, Early Early Jurassic.
Material: Skull and skeleton.