Nebrius cf. serra
(Leidy, 1877)
Classification: Elasmobranchii Orectolobiformes Ginglymostomatidae
Reference of the original description
Description of vertebrate remains, chiefly from the Phosphate Beds of South Carolina. Journal of the Academy of Natural Sciences of Philadelphia, 8(2), 209–261
Description of vertebrate remains, chiefly from the Phosphate Beds of South Carolina. Journal of the Academy of Natural Sciences of Philadelphia, 8(2), 209–261
Types
Nebrius cf. serra
Nebrius cf. serra
Description:
Citation: Nebrius cf. serra (Leidy, 1877): In: Database of fossil elasmobranch teeth www.shark-references.com, World Wide Web electronic publication, Version 12/2024
Description
Original diagnose after Leidy (1877) p. 250: Among the fish teeth occurring in collections of fossils from the Ashley phosphate beds, I have noticed a number which appear to pertain to a species of Ray. Teeth of the kind are 1•epresented in figures 10-1:3, Plate xxxiv., twice the natural size. They may perhaps be symphysial teeth of a Shark. The crown of these teeth is usually wider than high, and the base is extended downward at the middle in a rounded prominence, and backward posteriorly in a similar prominence. The summit rises in a tapering point, and the lateral acute borders exhibit seven or eight denticles successively decreasing towards the base. The teeth of figures 10, 11, have the main point worn off and the lateral denticles more or less abraded. The tooth of figure 12 has the main point partially worn off; and even that of fig. 13 has the extreme point somewhat blunted by abrasion. The root of these teeth is a shallow basis with a trilateral outline, the angles rounded and the lateral ones slightly projecting.
Original diagnose after Leidy (1877) p. 250: Among the fish teeth occurring in collections of fossils from the Ashley phosphate beds, I have noticed a number which appear to pertain to a species of Ray. Teeth of the kind are 1•epresented in figures 10-1:3, Plate xxxiv., twice the natural size. They may perhaps be symphysial teeth of a Shark. The crown of these teeth is usually wider than high, and the base is extended downward at the middle in a rounded prominence, and backward posteriorly in a similar prominence. The summit rises in a tapering point, and the lateral acute borders exhibit seven or eight denticles successively decreasing towards the base. The teeth of figures 10, 11, have the main point worn off and the lateral denticles more or less abraded. The tooth of figure 12 has the main point partially worn off; and even that of fig. 13 has the extreme point somewhat blunted by abrasion. The root of these teeth is a shallow basis with a trilateral outline, the angles rounded and the lateral ones slightly projecting.
Remarks
shark-references Species-ID=7751;
shark-references Species-ID=7751;
References
Late Oligocene sharks and rays from the Chandler Bridge Formation, Dorchester County, South Carolina, USA. Acta Palaeontologica Polonica, 54(4), 627–647
DOI: 10.4202/app.2008.0077
Late Oligocene sharks and rays from the Chandler Bridge Formation, Dorchester County, South Carolina, USA. Acta Palaeontologica Polonica, 54(4), 627–647
DOI: 10.4202/app.2008.0077
