Cranial and dental material of Gomphotherium wimani (Gomphotheriidae, Proboscidea) from the Middle Miocene of the Linxia Basin, northwestern China

Vertebrata Palasiatica ›› 2017, Vol. 55 ›› Issue (4): 331-346.

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Cranial and dental material of Gomphotherium wimani (Gomphotheriidae, Proboscidea) from the Middle Miocene of the Linxia Basin, northwestern China

YANG Xiang-Wen, LI Yu , WANG Shi-Qi

Online:2017-12-15 Published:2017-12-15

临夏盆地中中新统维曼嵌齿象(Gomphotherium wimani) (长鼻目，嵌齿象科)的头骨及颊齿

杨湘雯，李雨，王世骐

Abstract

摘要： 嵌齿象是真象的基干类群，其研究历来受到重视，同时也存在很多争议。维曼嵌齿象(Gomphotherium wimani)是中国的一个特有种，之前仅有一些牙齿和破碎下颌的报道，研究者对其形态特征和演化地位的认识一直比较模糊。本文报道了发现于甘肃省临夏盆地的维曼嵌齿象的新材料，包括上沟地点一件未成年头骨和倒黑沟地点属于同一个体的部分颊齿。通过研究对比，认为维曼嵌齿象是嵌齿象中一个比较进步的种，具有如下独有特征：颊齿的主齿柱前后中心小尖分裂并成嵴状，副齿柱趋向于分裂，发育有弱的副齿柱中心小尖，齿谷中等开阔，齿冠相对较高。对过去发现的维曼嵌齿象材料的厘定表明，该种最初建立时产于泉头沟地点的一颗m3实际上是葛氏铲齿象(Platybelodon grangeri)的M3; 而西宁吊沟地点发现的维曼嵌齿象的一件M3极有可能属于铲齿象类(amebelodontids)。对厘定后的维曼嵌齿象地点的研究表明，维曼嵌齿象分布于中国甘肃、青海的几个中中新统地点，其时代基本上可以与MN6？MN7/8早期相对比，时代跨度估计为15~13 Ma。

YANG Xiang-Wen, LI Yu , WANG Shi-Qi . Cranial and dental material of Gomphotherium wimani (Gomphotheriidae, Proboscidea) from the Middle Miocene of the Linxia Basin, northwestern China. Vertebrata Palasiatica, 2017, 55(4): 331-346.

杨湘雯，李雨，王世骐 . 2017, 55(4): 331-346, 临夏盆地中中新统维曼嵌齿象(Gomphotherium wimani) (长鼻目，嵌齿象科)的头骨及颊齿. 古脊椎动物学报.

Cranial and dental material of Gomphotherium wimani (Gomphotheriidae, Proboscidea) from the Middle Miocene of the Linxia Basin, northwestern China

临夏盆地中中新统维曼嵌齿象(Gomphotherium wimani) (长鼻目，嵌齿象科)的头骨及颊齿

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