A new species of Amolops (Anura : Ranidae) from Yunnan, China, with a discussion of karyological diversity in Amolops

We describe a new species, Amolops tuberodepressus, from the mountainous re gions of Jingdong County, Yunnan Province, China. This species differs from all other congeners in a combination of both karyological and morphologica l characteristics. Morphologically, the new species resembles A. mantzorum, A. kangtingensis, A. jinjiangensis, and A. liangshanensis occurring in sou thern Sichuan and northern Yunnan and may easily be confused with those spe cies. However, Amolops tuberodepressus differs from those species by the pr esence of a distinct tympanum, flatter supratympanic fold, flatter tubercle s on the flanks, and absence of a dorsolateral Fold. Karyological evidence also strongly supports the distinctness of the new species. A consideration of one Karyological character demonstrates that species of Amolops in sout hwestern China all share secondary constrictions on chromosome pair six. In view of the morphological similarity among species df Amolops in southwest ern China, these species may have only recently diverged from a common ance stral species.