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Oligodon pseudotaeniatus DAVID, VOGEL & VAN ROOIJEN, 2008

IUCN Red List - Oligodon pseudotaeniatus - Least Concern, LC

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Higher TaxaColubridae, Colubrinae, Colubroidea, Caenophidia, Alethinophidia, Serpentes, Squamata (snakes)
Subspecies 
Common Names 
SynonymOligodon pseudotaeniatus DAVID, VOGEL & VAN ROOIJEN 2008
Oligodon pseudotaeniatus — WALLACH et al. 2014: 502 
DistributionThailand (Nakhon Ratchasima)

Type locality: “Khorat”, Khorat Plateau, Nakhon Ratchasima Province, Thailand.  
Reproductionoviparous (not imputed, fide Zimin et al. 2022) 
TypesHolotype: BMNH 1938.8.7.37 (adult male). Collected and deposited by Malcolm A. Smith, October 1916. Paratypes (3 specimens). –BMNH 1938.8.7.38 (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. 
DiagnosisDiagnosis: 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. 
Comment 
EtymologyThe 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. 
References
  • Crane, Matt S.; Colin T. Strine, Tyler K. Knierim, Taks in Artchawakom, and Pongthep Suwanwaree 2018. Herpetofaunal Species Abundance, Richness, and Diversity in a Dry Tropical Forest and Agricultural Matrix at the Sakaerat Biosphere Reserve, Thailand. Herp. Cons. Biol. 13 (3): 586–597 - get paper here
  • David, P.; Vogel, G. & van Rooijen, J. 2008. A revision of the Oligodon taeniatus (Günther, 1861) group (Squamata: Colubridae) , with the description of three new species from the Indochinese Region. Zootaxa 1965: 1–49 - get paper here
  • DAVID, PATRICK; TRUONG QUANG NGUYEN, TAO THIEN NGUYEN, KE JIANG, TIANBO CHEN, ALEXANDRE TEYNIÉ & THOMAS ZIEGLER 2012. A new species of the genus Oligodon Fitzinger, 1826 (Squamata: Colubridae) from northern Vietnam, southern China and central Laos. Zootaxa 3498: 45–62 - get paper here
  • NEANG, THY; L. LEE GRISMER & JENNIFER C. DALTRY 2012. A new species of kukri snake (Colubridae: Oligodon Fitzinger, 1826) from the Phnom Samkos Wildlife Sanctuary, Cardamom Mountains, southwest Cambodia. Zootaxa 3388: 41–55 - get paper here
  • NGUYEN, SANG NGOC; VU DANG HOANG NGUYEN, SON HONG LE, ROBERT W. MURPHY 2016. A new species of kukri snake (Squamata: Colubridae: Oligodon Fitzinger, 1826) from Con Dao Islands, southern Vietnam. Zootaxa 4139 (2): 261–273 - get paper here
  • Wallach, Van; Kenneth L. Williams , Jeff Boundy 2014. Snakes of the World: A Catalogue of Living and Extinct Species. [type catalogue] Taylor and Francis, CRC Press, 1237 pp.
  • Zimin, A., Zimin, S. V., Shine, R., Avila, L., Bauer, A., Böhm, M., Brown, R., Barki, G., de Oliveira Caetano, G. H., Castro Herrera, F., Chapple, D. G., Chirio, L., Colli, G. R., Doan, T. M., Glaw, F., Grismer, L. L., Itescu, Y., Kraus, F., LeBreton 2022. A global analysis of viviparity in squamates highlights its prevalence in cold climates. Global Ecology and Biogeography, 00, 1–16 - get paper here
 
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