. Current herpetology. Reptiles; Herpetology. BAUER ET AL.—NEW DIXONIUS FROM THAILAND 21. Fig. 5. Male paratype (ZMB 65437) of Dixonius hangseesom, sp. nov. after seven years and three months in captivity. Note the fusion of dorsal dark markings and the drab tail in comparison to the same specimen earlier in life (Fig. 4). Photo by Wolfgang Grossmann. Dixonius hangseesom shares the dark eye stripe with D. melanostictus but unlike this form has a dorsal pattern with alternating light and dark markings (vs an essentially unpat- temed dorsum, or pale stripes or longitudinal series of light spots)
. Current herpetology. Reptiles; Herpetology. BAUER ET AL.—NEW DIXONIUS FROM THAILAND 21. Fig. 5. Male paratype (ZMB 65437) of Dixonius hangseesom, sp. nov. after seven years and three months in captivity. Note the fusion of dorsal dark markings and the drab tail in comparison to the same specimen earlier in life (Fig. 4). Photo by Wolfgang Grossmann. Dixonius hangseesom shares the dark eye stripe with D. melanostictus but unlike this form has a dorsal pattern with alternating light and dark markings (vs an essentially unpat- temed dorsum, or pale stripes or longitudinal series of light spots), a greater number of midbody scale rows (12-14 rows of tubercles and 22-26 ventrals vs 10-11 rows of tubercles and 22 ventrals; Taylor, 1963), and smaller body size (maximum 42 mm SVL vs 50 mm SVL). Description ofholotype Adult male, snout-vent length mm. Head relatively long (HeadL/SVL ratio ), wide (HeadW/HeadL ratio ), not mark- edly depressed (HeadH/HL ratio ), dis- tinct from slender neck. Lores and interorbital region weakly inflated, canthus rostralis rela- tively prominent. Snout moderately short (SnEye/HeadL ratio ), rounded; longer than eye diameter (OrbD/SnEye ratio ); scales on snout and forehead small, hexagonal to rounded, flattened, with smooth or slightly rugose surface and a low median keel, some conical; scales on snout larger than those on occipital region. Eye moderately large (OrbD/ HeadL ratio ); pupil vertical with crene- lated margins; supraciliaries short, without spines. Ear opening oval, obHquely oriented, relatively large (EarL/HeadL ratio ); eye to ear distance somewhat greater than diame- ter of eyes. Rostral approximately two-thirds deep ( mm) as wide ( mm), incom- pletely divided dorsally by a straight rostral groove; two somewhat enlarged supranasals in broad contact anteriorly, separated by a single, small internasal posteriorly; rostral in contact with supralabial I, supranasals, and internasal; nos
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Keywords: ., bookcollectionbiodi, booksubjectherpetology, booksubjectreptiles
