Xenochrophis flavipunctatus (HALLOWELL, 1860)
Can you confirm these amateur observations of Xenochrophis flavipunctatus?
|Higher Taxa||Colubridae (Natricinae), Colubroidea, Caenophidia, Alethinophidia, Serpentes, Squamata (snakes)|
|Common Names||E: Yellow-Spotted Keelback|
|Synonym||Amphiesma flavipunctatum HALLOWELL 1860: 503|
Natrix piscator flavipunctata — SMITH 1943
Xenochrophis flavipunctatus - MANTHEY & GROSSMANN 1997: 397
Xenochrophis flavipunctatus — PAUWELS et al. 2000
Xenochrophis flavipunctatus — VOGEL & DAVID 2006
Xenochrophis flavipunctatus — WALLACH et al. 2014: 797
|Distribution||India, Thailand, Myanmar, S China, West Malaysia, Laos, Cambodia, Vietnam, Bangladesh|
Type locality: Island of Hongkong [Hong Kong] and Canton River?, China Map legend:
- 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: USNM 7387, from Java (in the Greater Sundas, Indonesia).|
|Comment||Synonymy: Might be a synonym of Xenochrophis piscator; see discussion in Zhao & Adler. Xenochrophis flavipunctatus melanozostus is now treated as a valid species by several authors [e.g. DAS 1997, Hamadryad 22: 43]. But note that COX et al. (1998) include X. flavipunctatus in X. piscator. Xenochrophis flavipunctatus schnurrenbergeri KRAMER 1977 has been elevated to full species status. See also Xenochrophis piscator.|
VIDAL et al. (2007) placed Xenochrophis in the family Natricidae.
Distribution: Possibly in Bhutan (Lenz 2012).
Abundance: Common in Thailand and other places, active at dusk.
Habitat: mostly aquatic.
Taxonomy: Although Boie's (1826) redescription of Trop. (= Tropidonotus) melanozostus is generally quoted as the original description of the taxon (see for example, Smith, 1943: 293), the first usage was by Gravenhorst (1807).
Description: This species is characterized by (1) a dorsal pattern made of small dark blotches and streaks, larger on the sides; (2) small, white or yellow dorsolateral dots; (3) a well-defi ned nuchal marking, always appearing as a direct V (at the exception of two specimens from North Thailand); (4) two well-defi ned subocular streaks, the posterior one extending from the eye to the corner of the mouth then meeting the V- marking; (5) ventral and subcaudal scales all with entire, broad, dark margins; (6) a rather low number of ventral scales in males. The number of ventrals in males is lower than in X. piscator, but there is a wide overlap in females. X. flavipunctatus is very variable in colouration and in dorsal pattern, but this variability is not geographically correlated. The colouration of a specimen found in Singapore may have the same colour than one from South China. There are often some red or yellow hues on the forepart of the body [VOGEL & DAVID 2006].