Photographs of the holotype of Oligodon speleoserpens sp. nov. (ZMMU Re-17696, adult male) (a) right lateral, (b) dorsal and (c) ventral views of the head in life; (d) partially everted hemipenes; (e) venter at midbody, note the distinctly keeled ventral scales; and (f) underside of tail depicting a dark gray and white color pattern. Photographs by Parinya Pawangkhanant (a–c and e–f), and Mali Naiduangchan (d).

 
 
  Part of: Pawangkhanant P, Poyarkov NA, Ward-Smith H, Grassby-Lewis R, Sumontha M, Kliukin NS, Idiiatullina SS, Trofimets AV, Suwannapoom C, Lee JL (2024) A new species of karst-associated kukri snake (Reptilia: Squamata: Colubridae: Oligodon Fitzinger, 1826) from southern Thailand. Vertebrate Zoology 74: 359-379. https://doi.org/10.3897/vz.74.e112132