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New data on Cretaceous freshwater hybodont sharks from Guangxi Province, South China |
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| รหัสดีโอไอ | |
| Creator | Gilles Cuny, Jinyou Mo, Romain Amiot, Eric Buffetaut, Suravech Suteethorn, Varavudh Suteethorn and Haiyan Tong |
| Title | New data on Cretaceous freshwater hybodont sharks from Guangxi Province, South China |
| Publisher | Mahasarakham University |
| Publication Year | 2560 |
| Journal Title | Research & Knowledge |
| Journal Vol. | 3 |
| Journal No. | 1 |
| Page no. | 11--15 |
| Keyword | Hybodont sharks, Cretaceous, Asia, freshwater, endemism |
| ISSN | 2408 - 204X |
| Abstract | The Lower Cretaceous Xinlong Formation in Guangxi Zhuang Autonomous region, which was deposited in a non-marine, fl uvial environment, has yielded a diverse assemblage of vertebrates. The study of the shark teeth from the Xinlong Formation revealed the presence of teeth of Acrorhizodus khoratensis that do not appear to correspond to a jaw position retrieved in Thailand. It also provides a new understanding of the systematic affi nities of the species "Hybodus" aequitridentatus. The latter does not belong to te genus Hybodus but to a new genus belonging to the family Thaiodontidae. The material found in the Xinlong Formation also questions our understanding of the heterodonty pattern of the genus Acrorhizodus and highlights how peculiar this genus is among Hybodontiformes. As only two teeth differ signifi cantly from the material retrieved in Thailand, it is diffi cult to assess whether the Chinese material includes a species different from the Thai one, but it certainly calls for a careful reappraisal of all the available material to better assess the heterodonty pattern of this genus. |
