Pareas

Guo, Keji & Deng, Xuejian, 2009, A new species of Pareas (Serpentes: Colubridae: Pareatinae) from the Gaoligong Mountains, southwestern China, Zootaxa 2008, pp. 53-60 : 59

Key to Pareas species (based on Smith 1943, Rao & Yang 1992, Zhao et al. 1998, Zhao, 2006)

1 loreal contacting eye. .................................................................................................................................................... 2

- loreal not contacting eye ............................................................................................................................................... 4

2 vertebrals not enlarged................................................................................................................................ P. monticola

- vertebrals enlarged........................................................................................................................................................ 3

3 dorsals smooth........................................................................................................................................... P. boulengeri

- dorsals keeled, at least on median rows......................................................................................................... P. stanleyi

4 vertebrals not enlarged..................................................................................................................... P. margaritophorus

- vertebrals enlarged........................................................................................................................................................ 5

5 one anterior temporal................................................................................................................................... P. nigriceps

- two or three anterior temporals ..................................................................................................................................... 6

6 nasal divided.................................................................................................................................................. P. nuchalis

- nasal simple................................................................................................................................................................... 7

7 prefrontal contacting eye .............................................................................................................................................. 8

- prefrontal separated from eye...................................................................................................................... P. carinatus

8 more than 6 maxillary teeth .......................................................................................................................................... 9

- 4–6 maxillary teeth.................................................................................................................................. P. formosensis

9 7 infralabials................................................................................................................................................ P. hamptoni

- 8–9 infralabials.............................................................................................................................................. P. iwasakii