Genus: Muraenosaurus SEELEY, 1874
Etymology: Greek, myraina, “eel, lamprey”, Greek, sauros, “lizard”: Eel lizard.

Species: leedsii SEELEY, 1874

Referred material:

= Cimoliosaurus durobrivensis LYDEKKER, 1889

Holotype: BMNH R2628(2428?)

Locality: Peterbough, Cambridgeshire County, England, Southern United Kingdom.

Horizon: Oxford Clay.


Age: Callovian Stage, Upper Dogger Epoch, Late Jurassic.


Referred material:

BMNH R2427: Basioccipital and basisphenoid, exoccipitals, premaxilla, parts of mandible including the symphysial regions the atlas and axis, and 36 cervical vertebrae, the fused neural arches and cervical ribs, broken away in nearly all cases, 11 dorsal and 13 caudal vertebrae some with arches and ribs, numerous ribs, dorsal and ventral, chevrons, imperfect shoulder-girdle, ischium, ? femur, tibia, and fibula.
Note: Paleopathology, 2 humeri shows avascular necrosis (ROTHSCHILDS & STORRS, 2003)