Macrocalamus chanardi DAVID & PAUWELS, 2005
Can you confirm these amateur observations of Macrocalamus chanardi?
|Higher Taxa||Colubridae, Calamariinae, Colubroidea, Caenophidia, Alethinophidia, Serpentes, Squamata (snakes)|
|Common Names||Chanard’s Reed Snake|
|Synonym||Macrocalamus chanardi DAVID & PAUWELS 2005|
Macrocalamus chanardi — WALLACH et al. 2014: 417
Macrocalamus chanardi — QUAH et al. 2019
|Distribution||West Malaysia (Perak)|
Type locality: “Larut Hills, Perak, elevation 3500-4500 ft.”, now Bukit Larut, Perak, West Malaysia.
|Types||Holotype: BMNH 1900.6.14.17|
|Diagnosis||Diagnosis. – Macrocalamus chanardi is characterized by (1) a red, pink or orange venter in life; (2) the presence of a single dark ventrolateral stripe on each side, composed of the dark colour of the outer edges of ventral plates, bordered above by a more or less faint light yellow or cream stripe; (3) dorsal colour brown bordered by, at least on the anterior part of body, on each side a dorsal row of white (yellow or ochre in life) stripe with dark-edged ocelli that are sometimes reduced to small black spots; (4) at least two, often three or four yellowish-ochre oblique bars, the first one on temporals, extending from the parietals to the throat, other(s) parallel to this temporal streak, extending on the neck from the top of the back down to the ventrals, (5) a ratio TaL/TL at least equal to 0.090 in females and 0.140 in males.|
This species is distinguished from all other species, except Macrocalamus lateralis, by (1) the uniform “red” color of its venter (either uniform yellow or powdered or chequered in other species) and (2) the presence of light dorsolateral ocelli. From Macrocalamus lateralis, with which it shares these two characters, Macrocalamus chanardi is distinguished by (1) the presence of loreal scale, (2) a higher number of subcaudal scales, (3) the presence of a a single dark ventrolateral stripe in M. chanardi instead of two close dark ventrolateral stripes separated by a narrow light stripe in M. lateralis, (4) the presence of a light dorsolateral stripe on which are located, in part for about half of their height, dorsolateral ocelli in M. lateralis (dorsolateral pale stripe absent in M. chanardi), (5) the absence of a dark vertebral stripe, present in M. lateralis, (6) the presence of two to six parallel streaks on the body in M. chanardi, vs. a single yellow oblique streak on the neck and no streak present on the body in M. lateralis.
Diagnosis: Adultmalesreach190mmSVL,221mmTL, and adult females reach 237 mm SVL, 264 mm TL. Head triangular, tapered anteriorly when viewed dorsally, depressed anteriorly, indistinct from neck; snout rounded, elongate; body cylindrical, moderately elongate; tail short, tapered to a point; rostral higher than broad, triangular; separates nasals, touching prefrontals; nostril piercing the anterior lower margin of the nasal, adjacent to the upper margin of the first supralabial and to edge of rostral; internasals absent, fused with prefrontals; one pair of prefrontals; one elongate loreal; one preocular; one postocular; one supraocular; suboculars absent; 1 + 2 temporals; eight supralabials, first and second in contact with nasal, second, third and fourth in contact with the loreal, fourth and fifth entering orbit, seventh the largest; seven infralabials, first pair in contact, first to fourth in contact with anterior chin shield, sixth the largest; 15 dorsal scale rows at midbody; dorsal scales smooth; 104–127 ventral scales (males 104–114, females 114–127); cloacal scale single; 18–28 divided subcaudals (males 23–28, females 18–24) (David & Pauwels, 2004; Quah et al. 2019).
|Etymology||Named after Mr. Tanya Chan-ard (National Science Museum, Pathumthani, Thailand), who was instrumental in collecting the Thai specimen.|
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