Gundis, or comb rats, are rodents of the family Ctenodactylidae. Extant gundis are restricted to Africa and represent a vestige of the diversity that the ctenodactylids attained at both palaeoecological and palaeobiogeographical levels. Here, we present an updated review of the Ctenodactylidae from the Valley of Lakes, Mongolia, based on the study of large collections now available. We have recognised 13 valid species of ctenodactylids grouped into five genera: Karakoromys, Huangomys, Tataromys, Yindirtemys, and Prodistylomys. The ctenodactylids show an initial burst in diversification in the early Oligocene followed by a sequential generic extinction of Karakoromys, Huangomys, and Tataromys. A maximum richness peak at the late Oligocene was followed by a profound diversity crisis. Yindirtemys, the only surviving genus, persisted into the Miocene, joining three Prodistylomys species. These last representatives of the group disappeared coinciding with the late Xiejian faunal reorganisation (Mongolian biozone D).

中文翻译：

---

蒙古栉指门（啮齿目、哺乳动物）的多样化率。

冈迪斯（Gundis），或称梳鼠，是栉足科（Ctenodactylidae）的啮齿动物。现存的冈迪斯仅限于非洲，代表了栉足类在古生态和古生物地理层面上所获得的多样性的遗迹。在此，我们基于对现有大量藏品的研究，对蒙古湖谷的栉水母科进行了最新综述。我们已经识别出 13 个有效的栉指鼠属物种，分为 5 个属：Karakoromys、Huangomys、Tataromys、Yindirtemys和Prodistylomys。栉水母在渐新世早期表现出最初的多样化爆发，随后喀喇昆仑鼠、黄鼠和塔塔鼠相继灭绝。渐新世晚期的丰富度达到顶峰之后，随之而来的是一场深刻的多样性危机。Yindirtemys是唯一幸存的属，持续到中新世，加入了三个Prodistyylomys物种。该群体最后的代表消失的同时，恰逢谢建动物区系重组（蒙古生物区D）。