复齿鼯鼠（学名：Trogopterus xanthipes），又名寒号鸟、橙足鼯鼠、黄足鼯鼠、寒号虫、寒搭拉虫，英语名complex-toothed flying squirrel，是一种生活于中国南部，包括湖北、湖南、贵州、四川以及云南的鼯鼠。虽然复齿鼯鼠属（Trogopterus）中共有5个曾描述的物种，但是目前认为这些动物皆为复齿鼯鼠。此外，与复齿鼯鼠相近的毛足飞鼠（Belomys pearsoni），有时也被归类为复齿鼯鼠属。

复齿鼯鼠的粪便是著名活血止痛中药五灵脂。

The complex-toothed flying squirrel (Trogopterus xanthipes) is a flying squirrel found in the southern Chinese provinces Hubei, Hunan, Guizhou, Sichuan, and Yunnan. Its name originates from the teeth, which differ from the other flying squirrels. The squirrel looks similar to other flying squirrels, most strikingly is a cluster of black hair at the bottom of the ear. The fur is grey-brown on top and white on bottom. Both its face and its tail are slightly red. The length of the body is about 30 cm, plus the tail which is another 30 cm long. The complex-toothed flying squirrel is near threatened.