Tricleidus

Tricleidus; Temporal range: Middle Jurassic, Callovian PreꞒ Ꞓ O S D C P T J K Pg N ↓
	Holotype specimen
Scientific classification
Kingdom:	Animalia
Phylum:	Chordata
Class:	Sauropsida
Superorder:	Sauropterygia
Order:	Plesiosauria
Suborder:	Plesiosauroidea
Family:	Cryptoclididae
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]

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

References[edit]

^ 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.
^ ^a ^b 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.
^ Persson, P.O. (1962): Plesiosaurians from Spitsbergen. Norsk Polarinstitutt, Årbok 1961, p. 62-68. Oslo University Press, 169 pp.
^ 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.

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