Tricleidus Andrews, 1909
T. seeleyi is the type and only species of Tricleidus.
T. seeleyi Andrews, 1909
Type material: BMNH R.3539. Disarticulated elements including most of skull and half postcranium.
Age and Location
Kosmoceras jason - Peltoceras athleta zones, Lowest deposits of the Oxford Clay, Callovian Stage, Upper Jurassic, from Fletton, near Peterborough, England.