FIGURE 43 in Illustrated Key to the Snakes of the Philippines

FIGURE 43. Lateral view of head of (A) Pseudorabdion mcnamarae (KU 327199), (B) Pseudorabdion cf. collaris (KU 315197), (C) Pseudorabdion oxycephalum (KU 324641), (D) Pseudorabdion montanum (KU 305063). Loreal scale (green; A), parietal scale (purplish-gray; C–D), fourth supralabial scale (light gray; C–D), postocular scale (blue; B), frontal scale (reddish brown; B–D), scale formed from fusion of supraocular and postocular scales (yellow; C–D).