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Carcharocles auriculatus
''Carcharocles auriculatus'' is a large extinct shark species of the family Otodontidae, closely related to the sharks of the genus ''Otodus'', and also closely related to the later species megalodon. Its teeth are large, having coarse serrations on the cutting edge, and also with two large cusplets. The teeth can reach up to 130 mm, and belonged to a large "megatoothed" shark.
==Assignment to the genus ''Carcharocles'' rather than ''Otodus''==
It is known that there is at least one genus in the family Otodontidae, that being ''Otodus''. But the names and number of the genera in Otodontidae is controversial and the family's accepted phylogeny varies among paleontologists in different parts of the world. In the USA and Britain the most widespread genus name for otodontids with serrated teeth is ''Carcharocles'', and the owners of unserrated ones ''Otodus''. In countries of the former USSR, like Ukraine or Russia, all of these genera were attributed to ''Otodus'', because scientists like Zhelezko and Kozlov thought that the absence or presence of tooth serrations is not enough to place these sharks in different taxa.
抄文引用元・出典: フリー百科事典『 ウィキペディア（Wikipedia）』
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