Ahaetulla anomala ANNANDALE, 1906
Can you confirm these amateur observations of Ahaetulla anomala?
|Higher Taxa||Colubridae, Ahaetuliinae, Colubroidea, Caenophidia, Alethinophidia, Serpentes, Squamata (snakes)|
|Synonym||Dryophis mycterizans var. anomalus ANNANDALE 1906|
Dryophis mycterizans lepidorostralis WALL 1908 (fide SMITH 1943)
Dryophis mycterizans lepidorostralis WALL 1910 [nomen nudum fide Wall 1910]
Passerita purpurascens — ANDERSON 1871 [in part]
Ahaetulla pulverulenta — DASGUPTA & RAHA 2004
Ahaetulla pulverulenta — DENZAU & DENZAU 2010
Ahaetulla anomala — MOHAPATRA et al 2017
Type locality: Santragachi, Howrah district, West Bengal, India
|Reproduction||ovoviviparous (5-15 live offspring)|
|Comment||Synonymy: after Mohapatra et al. 2017. Dryophis mycterizans var. anomalus has been listed as a synonym of Ahaetulla nasuta, e.g. by Wallach et al. 2014: 20. Passerita purpurascens Günther, 1864 is a junior synonym of Ahaetulla pulverulenta (see Theobald 1868, 1876 & Anderson 1871, Mohapatra et al. 2017).|
Sexual dichromatism. Various authors have mentioned about polymorphism in ground colour in snakes such as Boiga forsteni, Sonora semiannulata and Psammophis schokari (Mohapatra et al. 2009; Cox 2012; Hussain & Hussain 2013). In a recent publication, Cox and Chippindale (2014) suggested that despite dramatic color polymorphism in Sonora semiannulata, phenotypic diversity is not a major driver of genetic diversity within or among populations. Similarly Ahaetulla anomala shows colour polymorphism and has a gradient of green and brown colours. As stated earlier, adult males of this species are green coloured and adult females are brown in colour. Among the specimens examined, the greyish-green coloured individual is a juvenile male and the greyish brown individual is a juvenile female. These intermediate colours could be an artefact of ontogenic colour change (See Deepak et al. 2010). Sexual dichromatism is rare among snakes and until now documented in some groups such as vipers (Vipera, Bothrops) (Shine & Madsen 1994; Lindell & Forsman 1996; Marques & Sazima 2003; de Freitas et al. 2014), Comoran snake (Lycodryas) (Hawlitschek et al. 2012) and Malagasy leaf-nosed snakes Langaha madagascariensis (Krysko 2003). Ahaetulla anomala is therefore the first report of sexually dichromatic snake from the Indian subcontinent [MOHAPATRA et al 2017].
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