English: Acherontiscus caledoniae Micro-CT images and skull and lower jaw reconstructions. (a) Left lower jaw ramus from micro-CT scan, mesial surface at left, lateral surface at right. (b) Left lower jaw ramus reconstructions mesial surface at left, lateral surface at right. (c) Skull reconstructions, palate at left, skull roof centre, lateral view at right. (d) Left premaxilla. (e) Right maxilla, part of the jugal and other cirumorbital bones. (f) Camera lucida drawing of skull bones not visible in the scan. Scale bar 5 mm. (g) Micro-CT image of ventral surface of the skull with the lower jaw removed. (h) Micro-CT image of ventral surface of the skull with the lower jaw, marginal dentitigerous bones, and the parasphenoid removed. (i) Parasphenoid, ventral view at left, dorsal view at right. Figures except (f) not to scale. Abbreviation: ?bocc, ?basioccipital; ectop, ectopterygoid, hyob, hyobranchial elements; jug, jugal, L, left, lac, lacrimal; max, maxilla; par, parietal; preart, prearticular; premax, premaxilla; psph, parasphenoid; pteryg, pterygoid; quj, quadratojugal; R, right; sphet, sphenethmoid.