Cretascymnus beauryi
Feichtinger, Pollerspöck, Harzhauser, Auer, Ćorić, Kranner & Guinot, 2022
Classification: Elasmobranchii Squaliformes Somniosidae
Reference of the original description
Shifts in composition of northern Tethyan elasmobranch assemblages during the last millennia of the Cretaceous. Cretaceous Research, 142, Article 105414
Shifts in composition of northern Tethyan elasmobranch assemblages during the last millennia of the Cretaceous. Cretaceous Research, 142, Article 105414
Types
Cretascymnus beauryi
Cretascymnus beauryi
Description:
Citation: Cretascymnus beauryi Feichtinger, Pollerspöck, Harzhauser, Auer, Ćorić, Kranner & Guinot, 2022: In: Database of fossil elasmobranch teeth www.shark-references.com, World Wide Web electronic publication, Version 04/2024
Description
Original diagnose after Feichtinger et al. (2022) [31181]: Small somniosid teeth with a marked dignathic and gradient monognathic heterodonty. Sigmoidal and distally inclined upper anterior teeth with lanceolate-shaped cusp and labio-lingually compressed root. Crown with flat labial face, convex lingual face, and sharp cutting edges not reaching the basal crown edge. Lateral teeth triangular with distally bent crown and strong cutting edge reaching the crown base. Enameloid occasionally developed at base of the labial crown face. Basal root face squared in anterior teeth and rounded in more lateral to posterior teeth. Lingual root protuberance with one large medio-lingual foramen, accompanied by a central foramen. Labial root face with various number of foraminal openings. Strongly labio-lingually compressed lower jaw teeth with decreasing height to width ratio from anterior to posterior jaw position. Crown with distally inclined cusp, accompanied by distal heel. Labial crown face with long and broad apron, lingual face with well-developed root bulge pierced by a large medio-lingual foramen. One pair of margino-lingual foramina and a central foramen with nutritive groove present. Labial root face with one prominent pair of margino-lingual foramina, an additional larger foramen can be developed mesially. Small and randomly arranged oval foramina can occur below the apron’s edge. Root contour angular with slightly rounded edges and a centrally notched root base.
Original diagnose after Feichtinger et al. (2022) [31181]: Small somniosid teeth with a marked dignathic and gradient monognathic heterodonty. Sigmoidal and distally inclined upper anterior teeth with lanceolate-shaped cusp and labio-lingually compressed root. Crown with flat labial face, convex lingual face, and sharp cutting edges not reaching the basal crown edge. Lateral teeth triangular with distally bent crown and strong cutting edge reaching the crown base. Enameloid occasionally developed at base of the labial crown face. Basal root face squared in anterior teeth and rounded in more lateral to posterior teeth. Lingual root protuberance with one large medio-lingual foramen, accompanied by a central foramen. Labial root face with various number of foraminal openings. Strongly labio-lingually compressed lower jaw teeth with decreasing height to width ratio from anterior to posterior jaw position. Crown with distally inclined cusp, accompanied by distal heel. Labial crown face with long and broad apron, lingual face with well-developed root bulge pierced by a large medio-lingual foramen. One pair of margino-lingual foramina and a central foramen with nutritive groove present. Labial root face with one prominent pair of margino-lingual foramina, an additional larger foramen can be developed mesially. Small and randomly arranged oval foramina can occur below the apron’s edge. Root contour angular with slightly rounded edges and a centrally notched root base.
References
Shifts in composition of northern Tethyan elasmobranch assemblages during the last millennia of the Cretaceous. Cretaceous Research, 142, Article 105414
DOI: 10.1016/j.cretres.2022.105414
Shifts in composition of northern Tethyan elasmobranch assemblages during the last millennia of the Cretaceous. Cretaceous Research, 142, Article 105414
DOI: 10.1016/j.cretres.2022.105414
