Tricleidus

Tricleidus Temporal range: Middle Jurassic, Callovian PreꞒ Ꞓ O S D C P T J K Pg N ↓
Holotype specimen
Scientific classification
Domain:	Eukaryota
Kingdom:	Animalia
Phylum:	Chordata
Class:	Reptilia
Superorder:	†Sauropterygia
Order:	†Plesiosauria
Family:	†Cryptoclididae
Subfamily:	†Cryptoclidinae
Genus:	†Tricleidus Andrews, 1909
Species
T. seeleyi Andrews, 1909 (type)

Tricleidus is an extinct genus of cryptoclidid^[1] plesiosaur known from only specimen (BMNH R3539) from the middle Jurassic of United Kingdom.^[2] It was first named by Andrews in 1909 and the type species is Tricleidus seeleyi.^[2]

Skeletal diagram

One species, T. svalbardensis,^[3] was moved into Colymbosaurus in 2012.^[4] It was found in the Agardhfjellet Formation, Norway.

See also

• List of plesiosaur genera
• Timeline of plesiosaur research

References

1. Ketchum, H. F. & Benson, R. B. J. (2010). "Global interrelationships of Plesiosauria (Reptilia, Sauropterygia) and the pivotal role of taxon sampling in determining the outcome of phylogenetic analyses". Biological Reviews. 85 (2): 361–392. doi:10.1111/j.1469-185X.2009.00107.x. PMID 20002391. S2CID 12193439.
2. Andrews, C. W. (1910). "A Descriptive Catalogue of the Marine Reptiles of the Oxford Clay, Part I". British Museum (Natural History), London, England: 205 pp.
3. Persson, P.O. (1962): Plesiosaurians from Spitsbergen. Norsk Polarinstitutt, Årbok 1961, p. 62-68. Oslo University Press, 169 pp.
4. Knutsen, E. M.; Druckenmiller, P. S.; Hurum, J. (2012). "Redescription and taxonomic clarification of 'Tricleidus' svalbardensis based on new material from the Agardhfjellet Formation (Middle Volgian)" (PDF). Norwegian Journal of Geology. 92: 175–186.