符合的藏品

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象的演化

lower jaw were the prototype for the highly-specialized skulls of later Proboscidean . The wear pa.....more

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using the dental formula. A typical set of mammalian teeth should consist of 3 upper and lower.....more

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of the Mesozoic Era. Their cheek teeth are tribosphenic, meaning the upper and lower premolars and molars all.....more

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teeth are lined up inside the mandible and each grow up (lower cheek teeth) or down (upper cheek teeth.....more

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or extinct have a pair of upper incisors pointing upward and the lower incisor became less prominent.....more

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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

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was ground to the diamond shape. The last teeth in the back of upper and lower jaws had the thickness.....more

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structures. Generally speaking, the upper and lower jaws of these whales have 7 to 9 pairs of teeth.....more

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primigenius had bulged forehead and short lower jaw. Mammuthus primigenius had dense and enamel plates.....more

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ice river. Lower sea level worldwide helped the formation of land path and thus, Stegodon sp. was able.....more

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