Ehret Dana J, Ebersole Jun
Alabama Museum of Natural History , Tuscaloosa, AL , USA.
McWane Science Center , Birmingham, AL , USA.
PeerJ. 2014 Oct 14;2:e625. doi: 10.7717/peerj.625. eCollection 2014.
The Otodontidae include some of the largest sharks to ever live in the world's oceans (i.e., Carcharocles megalodon). Here we report on Paleocene and Eocene occurrences of Otodus obliquus and Carcharocles auriculatus from Alabama, USA. Teeth of Otodus are rarely encountered in the Gulf Coastal Plain and this report is one of the first records for Alabama. Carcharocles auriculatus is more common in the Eocene deposits of Alabama, but its occurrence has been largely overlooked in the literature. We also refute the occurrence of the Oligocene Carcharocles angustidens in the state. Raised awareness and increased collecting of under-sampled geologic formations in Alabama will likely increase sample sizes of O. obliquus and C. auriculatus and also might unearth other otodontids, such as C. megalodon and C. chubutensis.
耳齿鲨科包括一些有史以来生活在世界海洋中的最大鲨鱼（即巨齿鲨）。在此，我们报告美国阿拉巴马州古新世和始新世的斜耳齿鲨和耳状噬人鲨的发现情况。在墨西哥湾沿岸平原很少发现耳齿鲨的牙齿，本报告是阿拉巴马州的首批记录之一。耳状噬人鲨在阿拉巴马州的始新世沉积物中更为常见，但在文献中其出现情况在很大程度上被忽视了。我们还反驳了该州渐新世窄齿噬人鲨的存在。提高对阿拉巴马州采样不足的地质层的认识并增加采集量，可能会增加斜耳齿鲨和耳状噬人鲨的样本量，也可能会发掘出其他耳齿鲨科物种，如巨齿鲨和丘布特噬人鲨。
