Abstract

Onychodus scoticus Newton, a taxon based originally on isolated tooth whorls from the Lower Devonian (Loch- kovian) of ‘Turin Hill’, Forfar, Scotland was reassigned to the genus Protodus by Traquair in the late 1800s following discovery at the type locality of an articulated specimen comprising a head with the same kind of tooth whorls, and because of some similarity between these teeth and those of Protodus jexi Woodward. New material including tooth whorls, scales and fin spines of “Protodus” scoticus, and a re-examination of the earlier described specimens of this taxon show that “Protodus” scoticus has scales and fin spines of the Nostolepis s.s. histological and morphological type, and all should therefore be reassigned to Nostolepis scotica comb. nov. This is the first Nostolepis species known from articulated material.