First occurrence of Duboisia (Bovidae, Artiodactyla, Mammalia) from Thailand
First occurrence of Duboisia (Bovidae, Artiodactyla, Mammalia) from Thailand
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DOI：
10.5194/fr-21-291-2018
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发表时间：
2018-10
期刊：
影响因子：
1.4
通讯作者：
Y. Nishioka;C. Vidthayanon
中科院分区：
文献类型：
--
作者：
Y. Nishioka;C. Vidthayanon
抽象的。来自泰国的 Duboisia（Boselaphini，牛科）的第一个化石记录证实该属不再是印度尼西亚爪哇特有的。新的化石材料是从泰国东北部呵叻府 Tha Chang 的一个沙坑中收集到的带有角核的颅骨（早于中更新世）。目前的标本暂时分配给杜波伊西亚 aff 的一个物种。 D. santeng，其角核上的角前脊和前龙骨比爪哇早更新世和中更新世沉积物的 D. santeng 弱，但这些物种的角核具有以下基本特征：下半部向后倾斜；上半部分向上弯曲；横截面呈圆形三角形，前后压缩，并有内侧和外侧龙骨。 D. aff 之间的形态相似性。 santeng 和 D. santeng 支持中更新世之前东南亚大陆和爪哇之间存在强烈的动物区系交流，并表明 Duboisia 属与“Siva-马来亚”地区的 Boselaphini 的其他属分化。
Abstract. The first fossil record of Duboisia (Boselaphini, Bovidae) from Thailand confirms that this genus is no longer endemic to Java, Indonesia. The new fossil material is a calvarium with horn cores (older than the Middle Pleistocene) collected from a sandpit at Tha Chang, Nakhon Ratchasima Province, north-eastern Thailand. The present specimen is provisionally allocated to a species of Duboisia aff. D. santeng, which has weaker precornual ridges and anterior keels on the horn cores than D. santeng from Early and Middle Pleistocene deposits of Java, but these species share basic characteristics of horn cores as follows: the lower half inclined backwards; the upper half curved upwards; cross section rounded triangular, antero-posteriorly compressed, and with medial and lateral keels. Morphological similarities between D. aff. santeng and D. santeng support a strong faunal interchange between continental South East Asia and Java before the Middle Pleistocene, and suggest that the genus Duboisia diverged from the other genera of Boselaphini in the “Siva-Malayan” region.