Fig. 9 in Unveiling an enigma from the Cerrado: taxonomic revision of two sympatric species of Apostolepis Cope, 1862 (Dipsadidae: Xenodontinae: Elapomorphini) from central Brazil

Fig. 9. Dorsal (A, D), lateral (B, E), and ventral (C, F) views of the skull based on μCT imagery. A–C. Apostolepis albicollaris Lema, 2002, holotype (MCP 8355). D–F. A. cerradoensis Lema, 2003, holotype (MCP 15219). Different skull elements are digitally colored and the mandible is removed for better visualization. Abbreviations: BO = basioccipital; BS = basisphenoid; ECP = ectopterygoid; EXO = exoccipital; F = frontal; MX = maxilla; NA = nasal; P = parietal; PAL = palatine; PFR = prefrontal; PMX = premaxilla; PRO = prootic; PT = pterygoid; Q = quadrate; SMX = septomaxilla; SO = supraoccipital; ST = supratemporal; V = vomer.