PaleoDB taxon number: 100092
Alternative combinations: Plesiosaurus philarchus, Thaumatosaurus philarchus
Full reference: H. G. Seeley. 1869. Index to the Fossil Remains of Aves, Ornithosauria, and Reptilia, from the Secondary System of Strata, Arranged in the Woodwardian Museum of the University of Cambridge. Deighton, Bell, and Co, Cambridge 1-143
Sister taxa: none
Type specimen: CAMSM J.46913, a partial skeleton. Its type locality is Peterborough area, Porter Collection, which is in a Callovian offshore mudstone in the Oxford Clay Formation of the United Kingdom.
Ecology: aquatic carnivore