Xenochrophis cerasogaster (CANTOR, 1839)
Can you confirm these amateur observations of Xenochrophis cerasogaster?
|Higher Taxa||Colubridae (Natricinae), Colubroidea, Caenophidia, Alethinophidia, Serpentes, Squamata (snakes)|
|Common Names||E: Painted Keelback|
G: Dunkelbäuchige Fischnatter
|Synonym||Psammophis cerasogaster CANTOR 1839: 52|
? Tropidonotus cerasogaster — GÜNTHER 1859: 224
Xenochrophis cerasogaster — GÜNTHER 1864
Amphiesma schistaceum JAN 1865 (fide SMITH 1943)
Xenochrophis cerasogaster — BOULENGER 1893: 191
Xenochrophis cerasogaster — SMITH 1943: 317
Xenochrophis cerasogaster — DAS 1996: 59
Xenochrophis cerasogaster — WALLACH et al. 2014: 797
|Distribution||Pakistan, Nepal, Bangladesh, India (Assam, Uttar Pradesh), West Malaysia|
Type locality: Vicinity of Calcutta
|Types||Lectotype: iconotype, color plate in the Bodleian Library, London (fide KRAMER 1977)|
|Diagnosis||Diagnosis (genus): Günther (1864) erected the genus Xenochrophis with the following diagnostic characters: body cylindrical, rather stout; head narrow, elongate; eye with round pupil; nostrils lateral, situated in the upper part of a single plate; shields of the head regular; scales keeled, in nineteen rows; ventrals rounded; anal bifid; subcaudals paired; no conspicuously longer teeth; they are widely set, those in middle of maxillary series and those in front of mandible being rather larger than the others (fide Purkayashata et al. 2018).|
Diagnosis (genus). (1) body size large (maximum TL 970 mm), slender; (2) head narrow, elongate, moderately distinct from neck; (3) dorsal head scales in typical colubrid configuration; (4) internasals narrowed anteri- orly; (5) rostral large, as broad as high; (6) nasal com- plete, nostrils directed dorsolaterally; (7) dorsal scale rows 19 – 19 – 17, distinctly keeled throughout except the outermost two rows; (8) maxillary teeth 20 – 25, the median slightly longer, without diastema; (9) hemipenis bilobed, calyculate and spinous throughout, spines in an alternating arrangement; (10) two oblique, parallel dark stripes on lateral head absent (Cheng et al. 2021: 210).
|Comment||Distribution: Possibly in Bhutan (Lenz 2012).|
Type species: Psammophis cerasogaster CANTOR 1839: 52 is the type species of the genus Xenochrophis GÜNTHER 1864.
Key: Cheng et al. 2021 provide a key to the genera of Xenochrophis sensu stricto, Atretium, and Fowlea.
Synonymy: Cheng et al. 2021 doubted the generic assignment of the members of Xenochrophis and accepted only cerasogaster as the only member of the genus.
|Etymology||The generic nomen of Xenochrophis is presumably derived from the Greek xénos, meaning foreign, strange; chros, meaning color; and ophis, meaning snake. The generic nomen probably refers to the distinctive color pattern of this type species. The gender of this generic name is masculine.|
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