A new genus of treeshrew and other micromammals from the middle Miocene hominoid locality of Ramnagar, Udhampur District, Jammu and Kashmir, India
A new genus of treeshrew and other micromammals from the middle Miocene hominoid locality of Ramnagar, Udhampur District, Jammu and Kashmir, India
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来自印度查谟和克什米尔乌德汉普尔区拉姆讷格尔中新世人科动物所在地的树鼩和其他微型哺乳动物的新属
DOI：
10.1017/jpa.2022.41
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发表时间：
2022
影响因子：
1.4
通讯作者：
Singh, Ningthoujam Premjit
中科院分区：
文献类型：
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作者：
Sehgal, Ramesh Kumar;Singh, Abhishek Pratap;Gilbert, Christopher C.;Patel, Biren A.;Campisano, Christopher J.;Selig, Keegan R.;Patnaik, Rajeev;Singh, Ningthoujam Premjit
来自印度西瓦里克河下游的树鼩、刺猬和其他微型哺乳动物的化石记录很少。在这里，我们报告了在Ramnagar （Udhampur District， Jammu和Kashmir）周围中新世（Lower Siwalik）沉积物中发现的树鼩化石的一个新属和新种、刺猬Galerix标本和其他微型哺乳动物。来自Dehari的树鼩（Sivatupaia ramnagarensis n. gen. n. sp.）目前代表了Siwaliks最古老的双足化石记录，将其在该地区的时间范围延长了约2.5-4.0 Myr。饮食分析表明，与其他现存和化石的tupaiids相比，新的tupaiids可能适应较少的机械挑战或更多的果性饮食。Galerix的出现是最近才从印度Siwalik记录下来的，而Dehari的标本有助于确定Ramnagar地区可能存在相对较大的Siwalik Galerix物种。除了新发现的树鼩和刺猬外，还发现了啮齿类动物Kanisamys indicus、Sayimys sivalensis和Murinae indet的新标本。来自Dehari的数据有助于确认Ramnagar地区的年龄估计与巴基斯坦的Chinji组相当，很可能对应于Chinji组的中上部分。UUID: http://zoobank.org/56fb160c-2df8-4cd3-be91-af4dc02d0979
The fossil record of treeshrews, hedgehogs, and other micromammals from the Lower Siwaliks of India is sparse. Here, we report on a new genus and species of fossil treeshrew, specimens of the hedgehog Galerix, and other micromammals from the middle Miocene (Lower Siwalik) deposits surrounding Ramnagar (Udhampur District, Jammu and Kashmir), at a fossil locality known as Dehari. The treeshrew from Dehari (Sivatupaia ramnagarensis n. gen. n. sp.) currently represents the oldest record of fossil tupaiids in the Siwaliks, extending their time range by ca. 2.5–4.0 Myr in the region. Dietary analyses suggest that the new tupaiid was likely adapted for a less mechanically challenging or more frugivorous diet compared to other extant and fossil tupaiids. The occurrence of Galerix has only been recently documented from the Indian Siwaliks and the Dehari specimens help establish the likely presence of a relatively large Siwalik Galerix species in the Ramnagar region. In addition to the new treeshrew and hedgehogs, new specimens of the rodents Kanisamys indicus, Sayimys sivalensis, and Murinae indet. from Dehari help confirm that age estimates for the Ramnagar region are equivalent to the Chinji Formation in Pakistan, most likely corresponding to the middle to upper part of the Chinji Formation. UUID: http://zoobank.org/56fb160c-2df8-4cd3-be91-af4dc02d0979