Mike Taylor studied the holotype of R. zetlandicus for his Ph.D. thesis and subsequently published a description of the cranial anatomy (Taylor, 1992). Vincent and Smith (2010) referred the holotype of R. propinquus to R. zetlandicus
Rhomaleosaurus zetlandicus
Species
R. zetlandicus
Author
Phillips, 1854
Classification
Sauropterygia
Eosauropterygia
Eusauropterygia
Pistosauroidea
Pistosauria
Plesiosauria
Rhomaleosauridae
Rhomaleosaurus
Age
Toarcian, Early Jurassic
Type location
Whitby, Yorkshire, England
Geological formation
Alum Shale, Whitby Mudstone Formation, Toarcian, Lower Jurassic
Type specimen
YM G503, a partial skeleton including the skull on display in the Yorkshire Museum
Referred material
WM 851.S ('Plesiosaurus propinquus'), a partial skeleton including the skull on display in the Whitby Museum