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''Prosqualodon'' is an extinct genus of cetacean. ''Prosqualodon'' was related to and looked like modern toothed whales. It was about long and resembled a dolphin. It had long jaws with interlocking teeth that jutted to the outside, remaining visible when the jaws were closed, like those of a gharial.〔 In the back of the mouth it had triangular teeth similar to those of earlier cetaceans, but in most other respects, it was relatively advanced. It had developed the body form of modern whales, with a short neck and simple jaw structure, and like modern cetaceans, it also had a blowhole. The olfactory apparatus was reduced compared with earlier forms, suggesting that it had already lost much of its sense of smell, presumably relying on sound to catch its prey. ==Species== * ''Prosqualodon australis'' Lydekker, 1894 (type); from the early Miocene (Aquitanian) of Argentina〔R. Lydekker. 1894. Cetacean skulls from Patagonia. Anales del Museo de la Plata II:1-13〕 * ''Prosqualodon davidis'' Flynn, 1923; from the early Miocene (Aquitanian) of Tasmania, Australia〔T. T. Flynn. 1923. A whale of bygone days. Australian Museum Magazine 1:266-272〕 * ''Prosqualodon hamiltoni'' Benham, 1937; from the late Oligocene (Chattian) of New Zealand;〔W. B. Benham. 1937. The skull and other parts of the skeleton of Prosqualodon hamiltoni. Transactions of the Royal Society of New Zealand 67(1):8-14〕 appears to represent distinct genus.〔Fordyce, R. E., 1978. ''The morphology and systematics of New Zealand fossil cetacean.'' Ph.D thesis. University of Canterbury, New Zealand. http://ir.canterbury.ac.nz/bitstream/10092/4748/1/fordyce_thesis.pdf〕 The nominal species "Prosqualodon" ''marplesi'' Dickson, 1964,〔M. R. Dickson. 1964. The skull and other remains of Prosqualodon marplesi, a new species of fossil whale. New Zealand Journal of Geology and Geophysics 7:626-635〕 later treated as a species of the squalodelphinid ''Notocetus'',〔R. E. Fordyce. 1994. Waipatia maerewhenua, New Genus and New Species, Waipatiidae, New Family, an archaic late Oligocene dolphin (Cetacea: Odontoceti: Platanistoidea) from New Zealand. Contributions in Marine Mammal Paleontology Honoring Frank C. Whitmore Jr., Proceedings of the San Diego Society of Natural History 29:147-176〕 has been reclassified as a relative of ''Waipatia'' and given the new generic name ''Otekaikea''.〔Tanaka Y, Fordyce RE (2014) Fossil Dolphin Otekaikea marplesi (Latest Oligocene, New Zealand) Expands the Morphological and Taxonomic Diversity of Oligocene Cetaceans. PLoS ONE 9(9): e107972. doi:10.1371/journal.pone.0107972〕 抄文引用元・出典: フリー百科事典『 ウィキペディア（Wikipedia）』 ■ウィキペディアで「Prosqualodon」の詳細全文を読む スポンサード リンク
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