Description
Original diagnosis after Engelbrecht, Mörs, Reguero & Kriwet, 2017 [24830]: Orectolobid shark characterized by the following combination of dental characters: gradient monognathic heterodonty; main cusp of anterior teeth triangular and low, almost as high as crown shoulder; main cusp and lateral cusplets evenly inclined lingually; crown shoulder significantly mesiodistally expanded; labial and lingual crown faces of all teeth devoid of ornamentation; labial face in profile view straight to slightly sigmoidal; lingual crown face significantly convex from side to side; lateral cusplets well separated from base of the main cusp by a concave notch in all teeth; lateral cusplets very asymmetrical with mesial cusplet low and very triangular whereas the distal cusplet is very slender, higher, and more acute; generally an incipient, low additional cusplet developed mesially in teeth of anterior and lateral files; additional, very low cusplet present in more posterior teeth; apron very short, broad, almost rectangular in labial view with characteristic concave lateral margins, and only slightly jutting over the root in profile view; anterior margin of apron characteristically curved downwards but not reaching the basal root plane in profile view; cutting edges continuous between cusplets and cusp but not reaching the apex of main cusp; lingual protuberance prominent, oblique in profile view, and completely enameloid-covered; root in basal view heart-shaped in all tooth positions with diverging, broad root lobes enclosing an anterior labial depression; pair of marginolingual foramina small and rounded; mediolingual foramen small and located near the base of the lingual protuberance in the edge where the root lobes meet; root lobes separated at level of lingual protuberance forming a more or less well-developed open nutritive groove.

Remarks
shark-references Species-ID=14808;
type species of Coelometlaouia Engelbrecht, Mörs, Reguero & Kriwet, 2017 [24830] by monotypy (Art. 68.3 ICZN);

References