A new species of the genus Liopeltis Fitzingerı 1843 from Vietnam (Squamata: Colubridae)
Author
ı Tan Van Nguyen, Nikolay A. Poyarkov Jr.
Author
Vogel, Gernot
text
Journal of Natural History
2019
2019-09-18
53
27
1647
1672
journal article
24016
10.1080/00222933.2019.1656784
9773657e-8372-45b6-b04f-5df047fb3f6b
1464-5262
3670307
Revised key to the genus
Liopeltis
We want to emphasise that there are surely still more taxa to be described in the genus
Liopeltis
. In most species of the genus morphological variation is still not well knownı so the key presented below is just a snapshot of our current knowledge of this genus. Neverthelessı differences between
Liopeltis pallidonuchalis
sp. nov.
and all other congeners are large enough to easily recognise this taxon.
1
. Loreal shield present.. ... ... ... ... .... ... .... ... ... ... ... ... ... .... ... ... ... ... ... .... .... ..... ........
2
Loreal shield missing.. ... ... ... ... ... ... ... ... ... ... ... ... ... ... ... ... ... .... ... .... ... .... ... ... ..
5
2. More than 175 ventrals ... .... ... ... ... ... ... ... ... ... ... ... ... ... ... .... ... ... ... ... .......
L. rappi
Less than 175 ventrals.. ... ... ... ... ... ... ... ... ... ... ... ... ... ... ... ... ... ... .... ... .... .... ... ....
3
3. More than 115 subcaudalsı 13 dorsal rows one head length before vent.. ... ...
L. stoliczkae
Less than 110 subcaudalsı 15 throughout the body.. ... ... ... ... ... ... ... ... .... ... ... .... .... ..
4
4a. 140
–
172 ventralsı 84
–
105 subcaudalsı Ratio TaL/TL
0.290
–
0.340
ı postocular stripe very thickı dark-blackı 3
–
4 thinner dark stripes on flanks.. ... ... ... ... ... ... ... ... ... ... ... .................................................................................................................................................
L. frenata
4b
. 126
–
138 ventralsı 67
–
73 subcaudalsı Ratio TaL/TL
0.274
–
0.288
ı postocular stripe thin and pale.. ... ... ... ... ... ... ... ... ... ... ... ... ... ... ... ... ... ... ... ..
Liopeltis pallidonuchalis
sp. nov
.
5
. Less than 100 subcaudals.. ... .... ... ... ... ... ... ... ... ... ... ... ... ... ... ... ... ... .... ... ..
L. calamaria
More than 100 subcaudals.. ... .... ... ... ... ... ... ... ... ... ... ... ... ... ... ... .... ... ... ... ... .... ... ... ..
6
6a. Nasal shield fused to internasalı four brown longitudinal stripes on dorsum..
L. philippina
6b
. Nasal shield not fused to internasalı dorsum uniform.. ... ... ... ... ... ... ... ... .... ..
L. tricolor