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Chondrosteosaurus (meaning "cartilage and bone lizard") was a sauropod from Early Cretaceous England. The type species, Chondrosteosaurus gigas, was described by Richard Owen in 1876. The fossils of Chondrosteosaurus were discovered in the Wessex Formation on the Isle of Wight. C. gigas is known only from two neck vertebrae (specimens BMNH R46869 and BMNH R46870), with distinctive hollows and internal passages now interpreted as evidence of pneumatic air sacs. Paleontologist Harry Seeley had interpreted similar structures as pneumatic in his specimen of Ornithopsis.[1] Owen disagreed with Seeley's concept of a giant creature similar to birds or pterosaurs (Owen considered sauropods to be whale-like marine reptiles), and while he acknowledged that the external cavities on the vertebrae may have been connected to the lungs, he interpreted the internal passages as having been filled with cartilage (hence his name for the genus, Chondrosteosaurus or "cartilage and bone lizard").[2]
[edit] References
- ^ Seeley, H.G. (1870). "On Ornithopsis, a gigantic animal of the pterodactyle kind from the Wealden." Annals and Magazine of Natural History, Series 4, 5: 279-283.
- ^ Owen, R. (1876). "Monograph on the fossil Reptilia of the Wealden and Purbeck Formations. Supplement 7. Crocodilia (Poikilopleuron). Dinosauria (Chondrosteosaurus)." Palaeontographical Society Monographs, 30: 1-7.
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