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