Taxon - Odkazy a literatura
Dzik J. (1983): Early Ordovician conodonts from the Barrandian and Bohemian-Baltic faunal relationships, Acta Palaeontologica Polonica, 28, 3-4, 327-368 [jako Drepanoistodus forceps (Lindström, 1955)]
Dzik J. (1983): Early Ordovician conodonts from the Barrandian and Bohemian-Baltic faunal relationships, Acta Palaeontologica Polonica, 28, 3-4, 327-368 [jako Drepanoistodus forceps (Lindström, 1955)]