Species;Source;Ventrals;Subcaudals;Anal;Supralabials;Loreal;Hemipenis;"Maxillary teeth";"Palatine, Ptyregoid teeth";"Dorsal Pattern";"Ventral Pattern" "Oligodon churahensi sp. nov.";"present study";170–175;46–47;divided;7;present;"forked, spinose";8–10;absent;"48–54 bands on body";"whitish with brown smear" "O. affinis";"Smith 1943; Whitaker and Captain 2004";128–133;23–36;divided;7;absent;"not forked, spinose";7;N.A.;"31–41 bands on body";"whitish with rectangular black marking" "O. arnensis";"Smith 1943; present study";161–202;41–59;divided;6–8;absent;"forked, spinose";8–11;present;"≤40 bands on body";"white without any marking" "O. cinereus";"Smith 1943";157–185;29–42;single;8;present;"not forked, lack spines";10–12;N.A.;variable;variable "O. erythrogaster";"Smith 1943";169–186;42–59;divided;7;absent;"not forked, lack spines";7–8;N.A.;stripes;"reddish with black spots on the edges" "O. melanozonatus";"Smith 1943";171–173;42–45;divided;6;absent;N.A.;8;N.A.;bands;"whitish with squarish black spots" "O. theobaldi";"Smith 1943";164–180;30–42;divided;8;present;"not forked, lack spines";15–16;N.A.;"4 stripes with faint transverse bands";variable "O. travancoricus";"Smith 1943; Ganesh et al. 2009";150–155;31–39;divided;7;absent;"not forked, spinose";7;N.A.;"23–27 bands on body";"white with black checkered marking" "O. venustus";"Smith 1943";138–165;27–36;divided;7;absent;"not forked, spinose";7–8;N.A.;"bands made up of rhomboid or oval spots";"whitish with black quadrilateral spots" "O. woodmasoni";"Smith 1943; Vijayakumar and David 2006";164–190;43–57;single;6;present/absent;"not forked, lack spines";8–10;N.A.;"8 longitudinal stripes";"whitish with a brown stripe in the centre and a dark spot on the edges"