ABSTRACT During the Late Cretaceous, pleurodiran turtles were taxonomically diverse and, inhabited a variety of environments, within a practically worldwide distribution. Among this group, the most widespread at that time was Bothremydidae, which was represented in North America by four taxa: Algorachelus tibert, Chedighaii hutchisoni, Chedighaii barberi, and Bothremys cooki. Nevertheless, the presence of Bothremydidae in Mexico is so far very scarce, and the few reports were recognized at indeterminate generic level and have, not been analyzed in detail. In this paper we describe the first Bothremydini from Mexico, collected in a coal mine in Coahuila in the Late Cretaceous of the Olmos Formation (upper Campanian). The coal mines in this region are known for their paleoflora, but this turtle specimen is the first vertebrate to be notified. This specimen displays a unique combination of characters that allows its attribution to a new representative, Palauchelys montellanoi gen. et sp. nov., thus expanding knowledge about the diversity of this group in the American Cretaceous record.

中文翻译：

---

来自墨西哥科阿韦拉的奥尔莫斯组（上坎帕阶）的一种新的双足龟（Pleurodira）

摘要在白垩纪晚期，胸膜龟在分类学上是多样的，栖息在各种环境中，几乎在全球范围内分布。在这一类群中，当时分布最广的是 Bothremydidae，它在北美有四种分类群：Algorachelus tibert、Chedigai hutchisoni、Chedighhaii barberi 和 Bothremys cooki。尽管如此，迄今为止，墨西哥的双足科的存在非常稀少，少数报告在不确定的通用水平上得到认可，并且没有进行详细分析。在本文中，我们描述了来自墨西哥的第一个 Bothremydini，它在奥尔莫斯组（上坎帕阶）的晚白垩世的 Coahuila 的一个煤矿中收集。该地区的煤矿以其古植物群而闻名，但这种海龟标本是第一个得到通知的脊椎动物。该标本展示了独特的字符组合，可以将其归因于新的代表 Palauchelys montellanoi gen。等 sp. 11 月，从而扩展了有关美国白垩纪记录中该群体多样性的知识。