Fig. 1. (A) Reconstructed computer image of a neonate Z. cavirostris head. Dark grey areas show the outer skin layer. The light blue region is bone, i.e. the skull and mandible. The white area is the connective tissue theca that encompasses the melon, seen in yellow. Mandibular fat bodies are also shown in yellow. Colorized CT scans of transverse slices through (B) a posterior region and (D) an anterior region of the head. C and E represent line drawings that diagram the body parts seen in scans B and D, respectively. Abbreviations: b, blubber; ct, connective tissue; ma, maxilla; me, melon; mf, mandibular fat; mn, mandibular bones; mu, muscle. Only interior mandibular fat is represented in these images.