Description
Original diagnosis after Turner & Burrow, 2011 [12809]: Xenacanthiform with presumed dorsal spine, and numerous small to medium-sized teeth 1.5–8.5 mm high, slightly asymmetrical with one of two major cusps being thicker than the other; all cusps with subcircular parabasal section and no lateral carinae; two lateral (main) cusps with five to six wavy cristae on labial side of cusp and up to 20 cristae in total; cristae extending from cusp apex down almost to cusp/base interface, some branching towards base; median cusp not greater than half main cusp height, set slightly labiad; angle between teeth and base ca. 100◦; large rounded high coronal button separated from cusps, positioned in center of dorsolingual base surface, occasionally connected to region of median cusp by narrow ridge; several foramina, fewer than five, around base of coronal button; base extends lingually beyond coronal button; base robust, circular to heartshaped or subtriangular outline; basal tubercle prominent and more or less equal to height of base, ventrally expressed as a wide horseshoe shape; basal surface with central depression, often with wide groove leading to midpoint of lingual edge; vascular canal foramina large, with no uniform pattern except around edge of basal concavity or lingual to labial boss surface; one large foramen usually in center of basal depression, with less than five other foramina around edge of central concavity.

Remarks
shark-references Species-ID=10859;
type species of Reginaselache Turner & Burrow, 2011 [12809] by original designation (Art. 68.2 ICZN);

References