Micro-CT images of the skull of the holotype of Apostolepis ambiniger (ZMB 6450) in A) anterior, and B) posterior views; AS (ascending process of premaxilla); BO (basioccipital); BS (basisphenoid); CP (compound bone); D (dentary); ECP (ectopterygoid); EXO (exoccipital); F (frontal); MX (maxilla); NA (nasal); OC (occipital condyle); P (parietal); PFR (prefrontal); PMX (premaxilla); PRO (prootic); PT (pterygoid); Q (quadrate); RP (retroarticular process of compound bone); SMX (septomaxilla); SO (supraoccipital); ST (supratemporal); V (vomer).