Detail of jaws; lighter portion of Meckel’s cartilage is less calcified portion. A, Scyliorhinus ugoi, USNM 221611, male, 432 mm TL; B, Apristurus longicephalus, HUMZ 170382, male, 475 mm TL. lrq, labial ridge of the quadrate process; mck, Meckel’s cartilage; opq, orbital process of the palatoquadrate; pq, palatoquadrate.

  Part of: Soares KDA, de Carvalho MR (2020) Phylogenetic relationship of catshark species of the genus Scyliorhinus (Chondrichthyes, Carcharhiniformes, Scyliorhinidae) based on comparative morphology. Zoosystematics and Evolution 96(2): 345-395.