Dermal denticles above the origin of the first dorsal fin. A, Apristurus longicephalus, HUMZ 170382, male, 475 mm TL; B, Asymbolus rubiginosus, AMS I.30393-004, male, 527 mm TL; C, Atelomycterus fasciatus, CSIRO H1298-7, male, 370 mm TL; D, Cephaloscyllium sufflans, SAIAB 6242, male, 800 mm TL; E, Cephalurus cephalus, USNM 221527, female, 285 mm TL; F, Galeus antillensis, UF 77853, female, 370 mm TL; G, Halaelurus natalensis, SAIAB 26951, male, 400 mm TL; H, Haploblepharus edwardsii, AMNH 40988, male, 480 mm TL; I, Holohalaelurus regani, SAIAB 25717, male, 610 mm TL; J, Parmaturus xaniurus, CAS 232152, female, 450 mm TL; K, Poroderma africanum, SAIAB 25343, male, 920 mm TL; L, Schroederichthys saurisqualus, UERJ uncatalogued, female, 564 mm TL. Scale bar: 250 µm.