Homalopsidae
Creators: name: Köhler, Gunther
name: Khaing, Khin Pa Pa
name: Than, Ni Lar
name: Baranski, Damian
name: Schell, Tilman
name: Greve, Carola
name: Janke, Axel
name: Pauls, Steffen U.
Publisher: name: Zenodo
Year: 2021
Subjects: Biodiversity
Taxonomy
Animalia
Chordata
Reptilia
Squamata
Homalopsidae

description: Key to species of mud snakes (family Homalopsidae) known to occur in Myanmar
1 Dorsal scales at midbody in more than 30 rows.............................................................. 2
– Dorsal scales at midbody in fewer than 30 rows............................................................. 3
2a Nasals separated from each other............................................................ Bitia hydroides
2b Nasals in contact with each other...................................................... Homalopsis semizonata
3a Nasals separated from each other........................................................................ 4
– Nasals in contact with each other........................................................................ 6
4a Dorsal scales at midbody in 23–27 rows.................................................. .. Fordonia leucobalia
– Dorsal scales at midbody in 17 or 19 rows .................................................................. 5
5a Dorsal scales at midbody in 17 rows...................................................... Gerarda prevostiana
– Dorsal scales at midbody in 19 rows........................................................ Cantoria violacea
6a Dorsal scales keeled.................................................................... Cerberus rynchops
– Dorsal scales smooth.................................................................................. 7
7a Dorsal scales at midbody in 19–21 rows................................................................... 8
– Dorsal scales at midbody in 25–29 rows.................................................................. 10
8a Dorsal scales at midbody in 19 rows..................................................... Hypsiscopus plumbea
– Dorsal scales at midbody in 21 rows...................................................................... 9
9a Subcaudal scales>50; long-tailed, ratio tail length / SVL> 0.21 in males,> 0.18 in females............ Enhydris enhydris
– Subcaudal scales <40; short-tailed, ratio tail length / SVL <0.21 in males, <0.18 in females.......................................................................................... Myanophis thanlyinensis gen. nov., sp. nov.
10a Dorsal scales at midbody in 29 rows......................................................... Ferania sieboldii
– Dorsal scales at midbody in 25 rows..................................................................... 11
11a Dorsal scales on neck in 25 rows; scales of first three dorsal scale rows oval; a central spot on each ventral scale; no stripe on first dorsal scale row .................................................................... Gyiophis maculosa
– Dorsal scales on neck in more than 25 rows; scales of first three dorsal scale rows squarish; no central spot on each ventral scale; stripe on first dorsal scale row present.................................................................... 12
12a Dorsal scales at posterior body in 20 rows; 129 ventrals in single known female; 30/29 subcaudals in single known female; 4 rows of spots on dorsum; rostral scale narrow............................................ Gyiophis salweenensis
– Dorsal scales at posterior body in 21–23 rows; 142–148 ventrals in females; 41–58 subcaudals in females; 3 rows of spots on dorsum; rostral scale broad................................................................. Gyiophis vorisi
description: Published as part of Köhler, Gunther, Khaing, Khin Pa Pa, Than, Ni Lar, Baranski, Damian, Schell, Tilman, Greve, Carola, Janke, Axel & Pauls, Steffen U., 2021, A new genus and species of mud snake from Myanmar (Reptilia, Squamata Homalopsidae), pp. 301-325 in Zootaxa 4915 (3) on pages 311-312, DOI: 10.11646/zootaxa.4915.3.1, http://zenodo.org/record/4456421