Micro-CT images of the skull without mandibles of the holotype of Apostolepis ambiniger (ZMB 6450) in ventral view: (A) palatines, and pterygoids removed, (B) maxillae, palatines, pterygoids, quadrates and vomers removed; BO (basioccipital); BS (basisphenoid); ECP (ectopterygoid); EXO (exoccipital); F (frontal); MX (maxilla); NA (nasal); P (parietal); PFR (prefrontal); PMX (premaxilla); PRO (prootic); PSP (parasphenoid rostrum); Q (quadrate); SMX (septomaxilla); ST (supratemporal); V (vomer).