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Eothenomys custos

2022-12-01 18:07:56 133

The southwestern woolly rat belongs to the subgenus <Anteliomys> of the genus <Anteliomys>, and its species-level status is stable. There are currently 4 subspecies under the species, all distributed in Yunnan. The nominate subspecies <E. c. custos> (Thomas, 1912), the type locality is Deqin, Yunnan; the Lijiang subspecies <E. c. rubelius> (Allen, 1924), the type locality is Yulong Snow Mountain, Lijiang, Yunnan; the Cangshan subspecies <E. c. cangshanensis> Wang et Li, 2000, the type locality is Cangshan, Dali, Yunnan; the Ninglang subspecies <E. c. ninglangensis, Wang et> Li, 2000, the type locality is Ninglang, Yunnan.

1_九雷图片转化为.jpg

为中国特有种。仅分布于云南丽江。多生活於高山森林。
个体中等。体长平均99mm(79-110mm);尾长平均37.4mm(33-50mm);后足长平均17mm(15-19mm);耳高平均12.7mm(11-14mm)。尾长为体长的38%左右,短于体长之半。颜色和其他绒鼠类区别不大,体背毛基黑灰色,毛尖灰褐色至淡黄褐色。腹毛较暗,灰色。背腹毛色没有明显界限。头骨上,腭骨后缘截然中断,为一横骨板,不与翼骨相连,不形成纵脊,没有翼骨窝,这是绒鼠类和䶄类的共同特点。第1下臼齿呈横的汇合,左右三角形齿环相互连通。第1上臼齿内侧和外侧均有3个角突,区别于指名亚属()的内侧4个,外侧3个。第3上臼齿复杂,内侧4-5个角突,外侧3-4个角突。