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The dentition of Goodrichthys, a Carboniferous ctenacanthiform shark from Scotland

Authors


Michal Ginter, Institute of Geology, University of Warsaw, Zwirki i Wigury 93, 02–089 Warsaw, Poland. E-mail: m.ginter@uw.edu.pl

Abstract

Study of three sets of chondrichthyan teeth from the Mississippian (Viséan) of Glencartholm, Scotland, namely the dentition of the holotype of a ctenacanthiform shark Goodrichthys eskdalensis, the dentition of a recently found, yet undescribed shark (NMS 2000.14.2), and a group of isolated teeth probably found in a nodule, tentatively suggests that all of them represent the same species. The combined characters of these teeth show that the dentition of Goodrichthys was moderately heterodont, of a cladodont design, in which larger teeth may have had three, and smaller ones only two, lateral cusps on each side of a prominent, coarsely cristated median cusp. The base is similar to that of Cladodus and Famennian representatives of Ctenacanthus, with a prominent, undivided basolabial shelf and an almost straight orolingual ridge.

Ancillary