| 词条 | Californosaurus |
| 释义 |
| name = Californosaurus | fossil_range = {{fossilrange|228|210}} Late Triassic | image = Californosaurus_BW.jpg | image_width = 250px | image_caption = Californosaurus perrini | regnum = Animalia | phylum = Chordata | classis = Sauropsida | subclassis = ?Diapsida | ordo = Ichthyopterygia | subordo = Merriamosauria | familia = Californosauridae | genus = Californosaurus | genus_authority = Kuhn, 1934 | subdivision_ranks = Species | subdivision =
}} Californosaurus perrini ('Perrin's California lizard') was an ichthyosaur, an extinct marine reptile, from the Lower Hosselkus Limestone (Carnian, Late Triassic) of California. TaxonomyMerriam (1902) described it as a new species of Shastasaurus, S. perrini.[1] He later recognized the species as generically distinct from the Shastasaurus type species, erecting Delphinosaurus for S. perrini. However, Delphinosaurus had been previously used for an ophthalmosaurid from Albian-Cenomanian deposits in European Russia, and Kuhn (1934) provided the generic replacement name Californosaurus. Merriam (1938) independently erected Perrinosaurus to replace Delphinosaurus, but this is a junior objective synonym.[2][3] DescriptionThe long-snouted head is small in comparison with the rest of the body, as in basal ichthyosaurs such as Mixosaurus and Cymbospondylus. The tail is sharply turned downwards, in common with more advanced ichthyosaurs, with a small vertical fluke. It may have had a small dorsal fin. There is a small number of pre-sacral vertebrae (45 or 50). The phalanges (digit bones) are circular and widely spaced, giving the flipper a round appearance. It was three metres long. BiologyIt fed on fish and other small marine creatures. Like other ichthyosaurs it probably never ventured onto dry land, and gave birth in the water. See also
References1. ^*Merriam, J. C. (1902): Triassic Ichthyopterygia from California and Nevada. – Bulletin of the Department of Geology of the University of California, 3(4): 63–108. 2. ^Hilton, R. P., 2003, Dinosaurs and other Mesozoic reptiles of California: University of California Press, 318pp. 3. ^Kuhn, O., 1934. Ichthyosauria: Fossilium Catalogous, 1: Animalia, p. 1-75.
External links
7 : Late Triassic ichthyosaurs of North America|Fauna of California|Paleontology in California|Triassic California|Late Triassic first appearances|Late Triassic extinctions|Fossil taxa described in 1934 |
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