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| Elephantiformes without Ivories——A Weird Combination of Deinotherium and Platybelodon | |
| 摘 要： | 正In the main Proboscidean taxon of Elephantiformes,a huge pair of developed top incisors(ivories) has become a distinctive feature.The structure is usually made as a tool for individual foraging and a weapon for males to compete for mating.The Proboscidean taxon without ivories usually and only exists in the primitive taxon that were differentiated before Oligocene,for instance,Deinotherium merely developed a pair of |
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