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Eretmosaurus rugosus.JPG
Fossil in Natural History Museum, London
Scientific classification
Kingdom: Animalia
Phylum: Chordata
Class: Sauropsida
Subclass: Enaliosauria
Order: Sauropterygia
Genus: Eretmosaurus
Seeley, 1874
  • E. rugosus (Owen, 1840) (originally Plesiosaurus)

Eretmosaurus is an extinct genus of plesiosaur.[1]

Taxonomic history[edit]

Eretmosaurus was coined by Harry Govier Seeley for Plesiosaurus rugosus Owen, 1840[2] Richard Owen had coined the name P. rugosus for numerous vertebrae from the Early Jurassic Blue Lias of Gloucestershire and other unspecified locations in the UK.[3] Later, Owen described a headless skeleton (NHMUK 14435) that he assigned to P. rugosus,[4] and Seeley used NHMUK 14435 as the basis for coining a new genus for this species.

See also[edit]


  1. ^ Brown, David S., and Nathalie Bardet. "Plesiosaurus rugosus Owen, 1840 (currently Eretmosaurus rugosus; Reptilia, Plesiosauria): proposed designation of a neotype." Bulletin of Zoological Nomenclature 51.3 (1994): 247-249.
  2. ^ Seeley, H. G., 1874, Note on some of the generic modifications of the plesiosaurian pectoral arch: Quarterly Journal of the Geological Society of London, 1874, p. 436-449.
  3. ^ R. Owen. 1840. Report on British fossil reptiles. Report of the Ninth Meeting of the British Association for the Advancement of Science, Reports on the State of Science 43-126
  4. ^ R. Owen. 1865. A monograph of the fossil Reptilia of the Liassic formations. Part I, Sauropterygia. Palaeontographical Society Monographs 17(75):1-40

See also[edit]