Английская Википедия:Cryptoclidus
Шаблон:Short description Шаблон:Use dmy dates Шаблон:Italic title Шаблон:Automatic taxobox
Cryptoclidus (Шаблон:IPAc-en Шаблон:Respell) is a genus of plesiosaur reptile from the Middle Jurassic period of England, France, and Cuba.[1]
Discovery
Cryptoclidus was a plesiosaur whose specimens include adult and juvenile skeletons, and remains which have been found in various degrees of preservation in England, Northern France, Russia, and South America. Its name, meaning "hidden clavicles", refer to its small, practically invisible clavicles buried in its front limb girdle.
The type species was initially described as Plesiosaurus eurymerus by Phillips (1871). The specific name "wide femur" refers to the forelimb, which was mistaken for a hindlimb at the time. Fossils of Cryptoclidus have been found in the Oxford Clay of Cambridgeshire, England. The dubious species Cryptoclidus beaugrandi is known from Kimmeridgian-age deposits in Boulogne-sur-Mer, France.[2] Cryptoclidus vignalensis, which is now considered undiagnostic,[3] hails from the Jagua Formation of western Cuba.[4]
Description
Cryptoclidus was a medium-sized plesiosaur, with the largest individuals measuring up to Шаблон:Cvt long and weighing about Шаблон:Cvt.[5][6] The fragile build of the head and teeth preclude any grappling with prey, and suggest a diet of small, soft-bodied animals such as squid and shoaling fish. Cryptoclidus may have used its long, intermeshing teeth to strain small prey from the water, or perhaps sift through sediment for buried animals.[7]
The size and shape of the nares and nasal openings have led Brown and Cruickshank (1994) to argue that they were used to sample seawater for smells and chemical traces.[8]
Classification
The cladogram below follows the topology from Benson et al. (2012) analysis.[9]
See also
References
Further reading
- Z. Gasparini and L. Spaletti. 1993. First Callovian plesiosaurs from the Neuquen Basin, Argentina. Ameghiniana 30(3):245-254
External links
Шаблон:Commons category Шаблон:Wikispecies
Шаблон:Plesiosauria Шаблон:Taxonbar
- ↑ Brown, David S., and Arthur RI Cruickshank. The skull of the Callovian plesiosaur Cryptoclidus eurymerus, and the sauropterygian cheek. Шаблон:Webarchive Palaeontology 37.4 (1994): 941.
- ↑ Bologne-sur-Mer at Fossilworks.org
- ↑ Шаблон:Cite journal
- ↑ De la Torre, R., and A. A. Cuervo. (1939). Dos nuevas especies de ichthyosaurios del Jurisico de Vinales. Universidad de La Habana, Depto. Geol. y Paleont. pp. 1-9.
- ↑ 5,0 5,1 Шаблон:Cite journal
- ↑ Шаблон:Cite journal
- ↑ Шаблон:Cite book
- ↑ Brown and Cruickshank, 1994
- ↑ Шаблон:Cite journal
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- Fossil taxa described in 1892
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