Rhinobatos popenguinensis

Guinot, Hautier, Sambou & Martin, 2023


Classification: Elasmobranchii Rhinopristiformes Rhinobatidae

Reference of the original description
Guinot, G. & Hautier, L. & Sambou, B.S. & Martin, J.E. (2023)
The Upper Cretaceous elasmobranch fauna from Senegal. Cretaceous Research, 146, Article 105480

Types
Rhinobatos popenguinensis
Holotype: LSB: SN2012-73;


Description:


Citation: Rhinobatos popenguinensis Guinot, Hautier, Sambou & Martin, 2023: In: Database of fossil elasmobranch teeth www.shark-references.com, World Wide Web electronic publication, Version 08/2026

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Description
Original diagnosis after Guinot, Hautier, Sambou & Martin, 2023 [31795]: Small rhinopristiform species showing a weak degree of monognathic and possibly sexual dimorphism. Teeth slightly higher than wide. Crown lozenge-shaped in occlusal view with acute marginal and medio-labial angles. Transverse crest convex lingually, reaching the marginal angles and projecting lingually above median uvula. Occasional presence of incipient cusp. Margino-lingual faces reduced. Short and lingually protruding lateral uvulae. Median uvula strongly lingually projected not reaching the basal root edge. Profile of median uvula convex medially and near its basal tip; concave profile below the transverse crest and between the two convexities. Median uvula triangular with convex lateral margins and a sharp lower extremity; slight flaring of the media uvula below the notches separating the lateral uvulae in some teeth. Labial visor strongly overhanging the root with strong and rounded median process. Margino-labial crown edges straight to slightly concave in occlusal view. Root lingually projected and narrower than the crown. Basal face of root lobes convex and L-shaped with short marginal projections. Wide nutritive groove with large labial foramen.

Remarks
shark-references Species-ID=16484;

References
Guinot, G. & Hautier, L. & Sambou, B.S. & Martin, J.E. (2023)
The Upper Cretaceous elasmobranch fauna from Senegal. Cretaceous Research, 146, Article 105480
DOI: 10.1016/j.cretres.2023.105480