PaleoDB taxon number: 186137
Alternative combinations: Macroplata longirostris, Plesiosaurus longirostris, Rhomaleosaurus longirostris
Full reference: R. Tate and J. F. Blake. 1876. The Yorkshire Lias 1-475
Type specimen: MCZ 1033, a skeleton. Its type locality is 'Alum Shale' (Harpoceras falciferum), Whitby-Saltwick section, Yorkshire, which is in a Falciferum marine shale in the Whitby Mudstone Formation of the United Kingdom.
Ecology: aquatic carnivore