From Wikipedia, the free encyclopedia
  (Redirected from Tremamesacleis)
Jump to: navigation, search
Temporal range: Middle Jurassic, Callovian
Muraenosaurus leedsii.jpg
M. leedsi fossils
Scientific classification e
Kingdom: Animalia
Phylum: Chordata
Class: Reptilia
Superorder: Sauropterygia
Order: Plesiosauria
Family: Cryptoclididae
Subfamily: Muraenosaurinae
Genus: Muraenosaurus
Seeley, 1874
Type species
Muraenosaurus leedsii
Seeley, 1874

Muraenosaurus (meaning "moray eel lizard") is an extinct genus of cryptoclidid plesiosaur reptile, from the Middle Jurassic of England and possibly France.


M. leedsii
With a human to scale

Muraenosaurus grew to around 6 metres (20 ft) long, with around half of that length being taken up by the animal's neck, which possessed 44 vertebrae. Behind the neck, Muraenosaurus had a short, relatively inflexible body and powerful flippers. The head was remarkably small compared to the overall size of the animal, being only around 37 centimetres (15 in) long.[1][2][3]


  1. ^ Palmer, D., ed. (1999). The Marshall Illustrated Encyclopedia of Dinosaurs and Prehistoric Animals. London: Marshall Editions. p. 75. ISBN 1-84028-152-9. 
  2. ^ Seeley, HG. 1874. On Murænosaurus Leedsii, a Plesiosaurian from the Oxford Clay. Part I. Quarterly Journal of the Geological Society 30: 197-208.
  3. ^ Andrews, CW. 1913. A descriptive catalogue of the Marine Reptiles of the Oxford Clay, Part II. British Museum (Natural History). pp.205pp.