Sphenacanthus tenuis
Ginter, 2016
Classification: Elasmobranchii incert. sedis Sphenacanthidae
Reference of the original description
The heterodonty in euselachian sharks from the Pennsylvanian of Nebraska. Acta Geologica Polonica, 66(3), 299–312
The heterodonty in euselachian sharks from the Pennsylvanian of Nebraska. Acta Geologica Polonica, 66(3), 299–312
Description:
Citation: Sphenacanthus tenuis Ginter, 2016: In: Database of fossil elasmobranch teeth www.shark-references.com, World Wide Web electronic publication, Version 08/2026
Description
Original diagnosis after Ginter, 2016 [24491]: Small and slender teeth with protacrodont crowns, symmetrical or with the cusps slightly inclined distally. Four lateral cusplets on each side of the prominent, pyramidal median cusp in symmetrical specimens; five cusplets on mesial side and three on distal side in the most asymmetrical specimens. Base relatively deep, arched, with lingual extension very narrow or missing.
Original diagnosis after Ginter, 2016 [24491]: Small and slender teeth with protacrodont crowns, symmetrical or with the cusps slightly inclined distally. Four lateral cusplets on each side of the prominent, pyramidal median cusp in symmetrical specimens; five cusplets on mesial side and three on distal side in the most asymmetrical specimens. Base relatively deep, arched, with lingual extension very narrow or missing.
Remarks
shark-references Species-ID=14703;
shark-references Species-ID=14703;
References
The heterodonty in euselachian sharks from the Pennsylvanian of Nebraska. Acta Geologica Polonica, 66(3), 299–312
DOI: 10.1515/agp-2016-0015
The heterodonty in euselachian sharks from the Pennsylvanian of Nebraska. Acta Geologica Polonica, 66(3), 299–312
DOI: 10.1515/agp-2016-0015
