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Higher TaxaViperidae, Crotalinae, Colubroidea, Caenophidia, Alethinophidia, Serpentes, Squamata (snakes)
Common NamesThai: งูหางแห้มกุย (Ngu Hang Ham Kui)
E: Kui Buri Pitviper
F: Trimérésure de Kui Buri
G: Kui Buri Bambusotter 
DistributionPeninsular Thailand

Type locality: Khao Daeng Sub-district, Kui Buri District, Prachuap Khiri Khan Province, Peninsular Thailand  
TypesHolotype: QSMI 1500 (field number MS 703); adult male
Paratypes: AUP-02005 (field number MS 701), PSUZC-R 734 (MS 704) and PSUZC-R 735 (MS 731), adult males, QSMI 1501 (MS 702) and AUP-02006 (MS 732), adult females 
DiagnosisDiagnosis: Trimeresurus kuiburi sp. nov. can be distinguished from all other congeneric species by the combination of its red/purple bands on a green dorsum; white concave suborbital stripe in males; white, spaced vertebral dots in males; pale green belly lacking dark dots or stripe on the lateral sides of the ventrals; partially fused 1st supralabial and nasal scale; 19 dorsal scale rows at midbody; 164–171 ventrals; 63–65 subcaudals in males, 51–53 in females; maximal known SVL of 451 mm; and long, papillose hemipenes. (Sumontha et al. 2021).

Comparisons: Among these species, Trimeresurus kuiburi sp. nov. is readily distinguished from the widespread Trimeresurus albolabris, the Andaman and Nicobar Islands endemic T. andersonii, the Nicobar Archipelago endemics T. cantori, T. davidi, T. labialis and T. mutabilis, the Cardamom Mounts endemic T. cardamomensis, the Chinese T. caudornatus, the Indo-Burmese T. erythrurus, the Indonesian Tanahdjampea Island endemic T. fasciatus, the widespread T. guoi, the Vietnamese Hon Son Island endemic T. honsonensis, the Indonesian T. insularis, the Southeast Asian T. macrops, the southern Vietnamese-Cambodian T. rubeus, the Indian T. salazar and the Himalayan T. septentrionalis by its dorsal pattern made of purple-red bands on a green background (David & Vogel 2000; David et al. 2003; Grismer et al. 2008; Malhotra et al. 2011; Vogel et al. 2014; Chandramouli et al. 2020; Chen et al. 2020 a–b; Mirza et al. 2020). Its 19 MSR further separate it from Trimeresurus andersonii (21 MSR), T. cantori (27, 29 or 31), T. cardamomensis (21), T. caudornatus (21), T. davidi (21 or 23), T. erythrurus (23 or 25), T. fasciatus (21), T. guoi (21), T. honsonensis (21), T. insularis (21), T. labialis (21 or 23), T. macrops (21), T. mutabilis (21), T. purpureomaculatus (23–29), T. rubeus (21), T. septentrionalis (21) and most specimens of T. venustus (21, rarely 19). (Sumontha et al. 2021).

Color in life: Dorsal surface of head dark green with many scales also partly or entirely dark red, especially on the snout, and the interorbital, temporal and occipital regions. A contrasting white stripe begins under the loreal pit, forms a concave curve under the eye, then continues straight from the 7th to the last supralabial where it stops. Black vertical pupil; iris copper. The background color of the dorsum is dark green, similar to that of the head, with about 62 irregular, dark red crossbands. These red bands are about two dorsal scales long mediodorsally, but narrower on the lower flanks where they are about one dorsal scale long. At the level of the vertebral row, the red bands are generally separated by one dorsal scale. The vertebral row exhibits an interrupted line of white dots, spaced by five or six dorsal scales. Each scale of the lowest dorsal scale row shows a horizontally elongate white spot, forming a continuous white line from the neck to the end of the tail. Most of the scales of the first row also exhibit a smaller red dot, forming a dotted red line. Above the white stripe of the first dorsal scale row, the tail is red, except some thin lighter bands. The infralabials are green and white; the underside of the head is mostly white. The belly is uniformly pale green, of a lighter tone than the background color of the dorsum. (Sumontha et al. 2021). 
EtymologyThe specific epithet is a noun in apposition, invariable, in reference to the administrative district Kui Buri in which the type-locality lies. 
  • SUMONTHA, MONTRI; SUNUTCHA SUNTRARACHUN, OLIVIER S. G. PAUWELS, PARINYA PAWA-NGKHANANT, NIRUT CHOMNGAM, PRAPANTH IAMWIRIYAKUL & LAWAN CHANHOME 2021. A new karst-dwelling, colorful pitviper (Viperidae: Trimeresurus) from northern Peninsular Thailand. Zootaxa 4974 (2): 307–332 - get paper here
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