Gerarda prevostiana (EYDOUX & GERVAIS, 1837)
Can you confirm these amateur observations of Gerarda prevostiana?
|Higher Taxa||Homalopsidae, Colubroidea, Alethinophidia, Serpentes, Squamata (snakes)|
|Common Names||E: Gerard's Water Snake, Cat-eyed Water Snake, Glossy Marsh snake|
|Synonym||Coluber (Homalopsis) prevostianus EYDOUX & GERVAIS 1837: 5|
Gerarda bicolor GRAY 1849 (fide SMITH 1943)
Campylodon Prevostianum — DUMÉRIL & BIBRON 1854: 964
Gerarda prevostiana — COPE 1862: 1
Heleophis flavescens MÜLLER 1884 (fide SMITH 1943)
Helipophis flavescens MÜLLER 1884: 286 (fide MURPHY & VORIS 2014, in error)
Gerardia prevostiana — WALL 1905: 307
Gerardia prevostiana — WALL 1921: 262
Gerardia prevostiana — SMITH 1943: 394
Gerardia prevostianus — DAS 1996: 56
Gerarda prevostiana — MANTHEY & GROSSMANN 1997: 353
Gerarda prevostiana — COX et al. 1998: 42
Gerardia prevostiana — SHARMA 2004
Gerarda prevostiana — MURPHY & VORIS 2014: 20
Gerarda prevostiana — WALLACH et al. 2014: 306
|Distribution||India (coastal Maharashtra, N Kerala, Gujarat), S Myanmar (= Burma), Sri Lanka, Thailand ?, Philippines, S Cambodia,|
Bangladesh ?; West Malaysia; Singapore, Indonesia (Borneo: Sarawak)
Type locality: “Manille” (= Manila, 14°37' N, 120°58' E, Luzon, Philippines) Map legend:
- Type locality.
- Region according to the TDWG standard, not a precise distribution map.
NOTE: TDWG regions are generated automatically from the text in the distribution field and not in every cases it works well. We are working on it.
|Types||Holotype: unknown (DAS 2013)|
|Comment||History: The year of description of this species has been given as “1822”; we cannot find a paper by Eydoux & Gervais from that year, but another paper published in 1837 is available online.|
Diet: mainly crabs. The Gerard's water snake tears its prey into bite-sized pieces, in contrast to most other snakes (Jayne et al. 2002).
Habitat: marshes, mangroves and tidal rivers in the costal areas, i.e. partially “marine”.
Type species: Coluber (Homalopsis) prevostianus EYDOUX & GERVAIS 1837 is the type species of the genus Gerarda GRAY 1849.
Diagnosis (genus): Nasal scales separated by the internasal, dorsal scales smooth in 17 rows at mid-body; and loreal scale present. This monotypic genus is perhaps most easily mistaken for its sister lineage Fordonia, which has 25–29 scale rows at mid- body (MURPHY & VORIS 2014).
|Etymology||Etymology (genus): Beolens et al. (2011) were not able to track down the origin of the name Gerarda, but several people with “Gerard” as first or last name had sent specimens to Gray. The name Gerardia is preoccupied.|
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