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共找到 5 筆符合的資料
椎長鼻目嵌齒象Most of the elephants only have a pair of incisors (upper or lower) and only Gomphotherium sp.....more
was ground to the diamond shape. The last teeth in the back of upper and lower jaws had the thickness.....more
a single "finger" on the upper lip of the trunk, a short, high skull and a double-bulged forehead. Asian.....more
structures. Generally speaking, the upper and lower jaws of these whales have 7 to 9 pairs of teeth.....more
or extinct have a pair of upper incisors pointing upward and the lower incisor became less prominent.....more
