†superclass Thelodontida
Parent taxon: Craniata according to J. A. Long 2011
See also Obruchev 1964 and Sansom and Elliott 2002
Sister taxa: Coluber arcuatus, Conodontomorpha, Myllokunmingiiformes, Myxinomorphi, Pteraspidomorphi
Subtaxa: Coelolepidae Palaeodontidae Turiniidae
Ecology:
Distribution:
• Devonian of Australia (1 collection), Bolivia (1), the Russian Federation (2), Ukraine (1), the United Kingdom (3)
• Silurian of Canada (1: New Brunswick), China (1), Estonia (15), Lithuania (2), Norway (1), the Russian Federation (4), Sweden (6), the United Kingdom (85)
• Ordovician of Canada (1: Ontario)
Total: 124 collections including 225 occurrences