Species: tenuis EVANS, 1998
Etymology: Latin, tenuis, "slender"; in reference to the the build of the jaw.

Holotype: BMNH R12689

Locality: Kirlington Cement Quarry (Washford Quarry), Mammal bed, Kirtlington, Oxfordshire, England, Southern United Kingdom.

Horizon: Forest Marble Formation.

Biostratigraphy: Oppelia aspidoides zone.

Age: Upper Bathonian Stage, Middle Dogger Epoch, Middle Jurassic.

Material: A left dentary.