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Fowlea tytleri (BLYTH, 1863)

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Higher TaxaColubridae (Natricinae), Colubroidea, Caenophidia, Alethinophidia, Serpentes, Squamata (snakes)
Common NamesE: Tytler’s Keelback 
SynonymTripidonotus [sic] tytleri BLYTH 1863: 88
Tropidonotus striolatus THEOBALD 1868 (nom. nov. pro T. tytleri BLYTH)
Xenochrophis tytleri — VOGEL & DAVID 2006
Xenochrophis tytleri — WALLACH et al. 2014: 800
Fowlea tytleri — PURKAYASTHA et al. 2019 
DistributionAndaman Islands, possibly Nicobar Islands

Type locality: Andaman Island  
TypesHolotype: ZSI 7402 (formerly ZSI 46a ASB) 
DiagnosisDescription: This species is characterized by (1) a dorsal pattern
made of much elongated, dark blotches, sometimes producing stripes; (2) a well-defi ned nuchal marking, appearing as a broad, direct, widely open U, connected to the dorsolateral stripes; (3) two broad subocular streaks (broader than in any other species of the complex), the posterior one extending from the eye to the corner of the mouth then meeting the nuchal U; (4) ventral and subcaudal scales entirely uniform or only darkened on their tips [VOGEL & DAVID 2006]. 
CommentSimilar species: This species has been previously confused with Xenochrophis melanzostus. 
EtymologyNamed after Col. Tytler who sent the type specimens to Blyth. 
  • Beolens, Bo; Michael Watkins, and Michael Grayson 2011. The Eponym Dictionary of Reptiles. Johns Hopkins University Press, Baltimore, USA - get paper here
  • Blyth, EDWARD 1863. Report of the curator, zoological department. J. Asiatic Soc. Bengal, Calcutta, 32 (1): 73-90. - get paper here
  • Mohan AV, Swamy P, Shanker K. 2018. Population structure in the Andaman keelback, Xenochrophis tytleri: geographical distance and oceanic barriers to dispersal influence genetic divergence on the Andaman archipelago. PeerJ 6:e5752 - get paper here
  • Purkayastha, Jayaditya; JATIN KALITA, Rajeev Kungur Brahma, Robin Doley, MADHURIMA DAS 2018. A review of the relationships of Xenochrophis cerasogaster Cantor, 1839 (Serpentes: Colubridae) to its congeners. Zootaxa 4514 (1): 126-136, DOI: 10.11646/zootaxa.4514.1.10 - get paper here
  • Vogel, G. & Patrick David 2006. On the taxonomy of the Xenochrophis piscator complex (Serpentes, Natricidae). Herpetologica Bonnensis II: 241-246 - get paper here
  • Vogel, Gernot 2014. Die Andamanen – Ein wenig bekanntes Tierparadies. Terraria-Elaphe 2014 (6): 44-55 - get paper here
  • VOGEL, Gernot & Patrick DAVID 2012. A revision of the species group of Xenochrophis piscator (Schneider, 1799) (Squamata: Natricidae). Zootaxa 3473: 1–60 - get paper here
  • Wallach, Van; Kenneth L. Williams , Jeff Boundy 2014. Snakes of the World: A Catalogue of Living and Extinct Species. [type catalogue] Taylor and Francis, CRC Press, 1237 pp.
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