| 词条 | Ahaetulla anomala |
| 释义 |
| genus = Ahaetulla | species = anomala | authority = (Annandale, 1906) }}Ahaetulla anomala is a species of snake in the family Colubridae. It is the first reported sexually dichromatic snake from the Indian Subcontinent, and until 2017 was formerly regarded as a subspecies of the green vine snake, Ahaetulla nasuta. Its suggested English name is Variable coloured Vine Snake.[1] DescriptionThis species is sexually dichromatic. Males are green and resembles Common vine snake (Ahaetulla nasuta), while females are brown in colour and morphologically resemble Brown vine snake (Ahaetulla pulverulenta). DistributionIt is limited to India (Odisha, West Bengal, Jharkhand, Bihar) and Bangladesh. CharacteristicsAhaetulla anomala shows colour polymorphism and has a gradient of green and brown colour. Sexual dichromatism is rare among snakes and until now documented in some groups such as Vipers (Bothrops), Comoran Snakes (Lycodryas), Malagasy leaf-nosed snakes (Langaha madagascariensis). HistoryThis snake was first described by Thomas Nelson Annandale (the first director of the Zoological Survey of India) in 1906. For more than 100 years, its separate colour scheme used to get the females confused with Brown Vine Snake and the males with Common Vine Snake. To resolve this confusion a team of biologists conducted molecular and morphological study of this snake. And as a result, they found this snake to be of different species rather than Common Vine Snake and Brown Vine Snake. References1. ^{{Cite journal|last=Mohapatra|first=Pratyush|last2=K Dutta|first2=Sushil|last3=Kar|first3=Niladri Bhusan|last4=Das|first4=Abhijit|last5=Murthy|first5=BHCK|last6=Deepak|first6=V|date=2017-05-01|title=Ahaetulla nasuta anomala (Annandale, 1906) (Squamata: Colubridae), resurrected as a valid species with marked sexual dichromatism|url=https://www.researchgate.net/publication/316786557_Ahaetulla_nasuta_anomala_Annandale_1906_Squamata_Colubridae_resurrected_as_a_valid_species_with_marked_sexual_dichromatism|journal=Zootaxa|volume=4263|pages=318–332|doi=10.11646/zootaxa.4263.2.6}} {{Taxonbar|from=Q30085217}} 2 : Colubrids|Reptiles described in 1906 |
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