First record of a complete humerus of Agriotherium (mammalia-ursidae) from the early-late Hemphillian of Zacatecas, Mexico
First record of a complete humerus of Agriotherium (mammalia-ursidae) from the early-late Hemphillian of Zacatecas, Mexico
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DOI：
10.22201/cgeo.20072902e.2023.2.1738
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发表时间：
2023-07
期刊：
影响因子：
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通讯作者：
Ó. Carranza-Castañeda;Xiaoming Wang
中科院分区：
文献类型：
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作者：
Ó. Carranza-Castañeda;Xiaoming Wang
描述了一个完整的肱骨，称为 Agriotherium，是从萨卡特卡斯的早晚期 Hemphilian 沉积物中收集的。农兽在欧亚大陆和北美的早晚期半兽动物群中以孤立的臼齿、下颌骨和上颌骨为代表。在文献中，颅后元素很少，并且描述简单，细节很少。南非的 Langebaanweg 采石场的多样性最为丰富；然而，唯一完整的标本来自墨西哥。近端的描述，肱骨与南非对远端的描述有相似之处，其中内上髁和外上髁的嵴部减少，这可以被认为是狩猎较大猎物作为食物的限制。这意味着农兽并不是严格意义上的肉食性动物，而是一种捕食性清道夫，其饮食包括植物和水果在内的杂食性。
A complete humerus referred to Agriotherium is described, collected from early-late Hemphillian deposits from Zacatecas. Agriotherium is widely represented by isolated molars, mandibles, and maxillae in early-late Hemphillian faunas of Eurasia and North America. In the literature, postcranial elements are scarce and briefly described with little detail. The greatest diversity is known from the Langebaanweg quarry in South Africa; however, the only complete specimen is from Mexico. The proximal end is described, and the humerus shares similarities with the description of the distal end from South Africa, in which the medial epicondyle and crest of the lateral epicondyle are reduced, which can be considered as a limitation in the hunting of larger prey for food. This implies that Agriotherium was not strictly carnivorous but was a predator-scavenger with an omnivorous diet that included plants and fruits.