Oligodon pseudotaeniatus DAVID, VOGEL & VAN ROOIJEN, 2008
Can you confirm these amateur observations of Oligodon pseudotaeniatus?
|Higher Taxa||Colubridae, Colubrinae, Colubroidea, Serpentes (snakes)|
|Synonym||Oligodon pseudotaeniatus DAVID, VOGEL & VAN ROOIJEN 2008|
|Distribution||Thailand (Nakhon Ratchasima)|
Type locality: “Khorat”, Khorat Plateau, Nakhon Ratchasima Province, Thailand. 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. –BMNH 1918.104.22.168 (adult male). Collected and deposited by Malcolm A. Smith, October 1916. |
Paratypes (3 specimens). –BMNH 1922.214.171.124 (adult male), “Khorat, near Bangkok”; BMNH
1969.1838 (adult male), “Bangkok”; BMNH 1969.1828 (adult female), “Siam”; all collected and deposited by Malcolm A. Smith. All examined material belongs to the type series.
|Comment||Diagnosis. –A species of the genus Oligodon, characterized by (1) deeply forked hemipenes, not spinose but fitted with two large papillae; (2) 17 dorsal scale rows at midbody, 15 before vent; (3) 15 maxillary teeth, the last two strongly enlarged; (4) anal plate single; (5) head scalation complete, including a presubocular in all available specimens; (6) 8 supralabials; (7) 8 or 9 infralabials; (8) a reduced pattern, with two darker longitudinal paravertebral stripes edging a faint, paler vertebral stripe, and on each side a poorly distinct dorsolateral stripe; and (9) only 3 major blotches on upper head surface: one anterior transverse marking, one frontal, and one large, straight nuchal butterfly-shaped marking across the neck, of which the lateral branches directed downwards do not reach the ventral scales. Oligodon pseudotaeniatus spec. nov. differs from all other members of the taeniatus-group by the combination of the vertebral pattern of Oligodon taeniatus but with a more subdued dorsal colour pattern, the absence of dorsolateral stripes and blotches on the tail, and only 17 dorsal scale rows at midbody. The four type specimens do not fit either with O. taeniatus (unless specimens with 17 DSR and a reduced pattern occur in this species) or with O. mouhoti (unless specimens without tail blotches and a much longer tail exist in this species). Referring these four specimens to any known species would alter their diagnoses established on the basis of several tens of specimens. We hence consider these specimens with 17 DSR to belong to a distinct taxon. Smith (1943: 210), under his “Oligodon taeniatus”, stated that one or both blotches of the tail may be absent, obviously referring to specimens of Oligodon pseudotaeniatus.|
Etymology.–The specific nomen is a Latin adjective formed on the basis of the adjective taeniatus, meaning striped, by allusion to the overall similarity of this new species to Oligodon taeniatus.