FIGURE 2 in A new species of Indo-Papuan groundsnake, genus Stegonotus Duméril et al., 1854 (Serpentes, Colubridae), from the Bird's Head Peninsula of West Papua, Indonesia, with comments on differentiating morphological characters

FIGURE 2. Characters used to assess the head scale pattern for species in the genus Stegonotus. (A) Positions of head scales, sutures, and measurements, including internasals (IN) and the internasal suture (InS), prefrontals (PF) and the prefrontal suture (PfS), the frontal (F) with its length (FL) and width (FW), the supraoculars (SO), and the parietals (P) with the parietal suture (ParS). (B) Positions of the posterior frontal angle (PF /), the anterior parietal angle (AP /) and its lateral ray (yellow line), and the anterior eye line (AE; white line). The underlying specimen is the holotype of Stegonotus ayamaru sp. nov. (RMNH.RENA 31199).