Figure 19 in Elasmobranchs from the Lower Triassic Sulphur Mountain Formation near Wapiti Lake (BC, Canada)

Figure 19. Ctenacanthoidea incertae sedis 'genus A': dermal denticles and unidentified elements as preserved in specimen UALVP 46572. A and B, bar-like?skeletal elements and impressions of elements aligned among numerous small denticles (arrows). C, denticle, and a sketch of the denticle, with diverging ridges in the crown. Possibly, this is the denticle-type referred to as 'Palaeobates' by Schaeffer & Mangus (1976). D, thin section (UALVP 46572-T1) through one of the denticles, showing the osteodont pedicle and the mesial platform with orthodont prongs covered entirely with enameloid.