†family Gyracanthidae Woodward 1906 (spiny fish)
Acanthodii - Climatiiformes - Gyracanthidae
Parent taxon: Climatiiformes according to J. S. Nelson et al. 2016
See also Denison 1979 and Jordan 1963
Sister taxa: Brochoadmonidae, Cassidiceps, Climatiidae, Euthacanthidae, Hanilepis, Pruemolepis, Vesperaliidae
Subtaxa: Aganacanthus Ankylacanthus Antacanthus Gyracanthides Gyracanthus Mitrodus Oracanthus
Ecology: nektonic carnivore
Distribution:
• Carboniferous of Australia (2 collections), Belgium (1), Canada (1: Nova Scotia), the United Kingdom (5), United States (1: West Virginia)
• Devonian of Antarctica (1), Bolivia (1), Canada (2: New Brunswick), Germany (1), Iran (1), South Africa (2), United States (1: Michigan)
Total: 19 collections including 23 occurrences