Parent taxon: Acanthodii according to R. van der Laan 2019
See also Jordan 1963
Sister taxa: Acanthodi, Acanthodida, Acanthodiformes, Antarctonchus, Archaeacanthus, Byssacanthoides, Campylodus, Climatiida, Climatiiformes, Diplacanthi, Diplacanthiformes, Eupleurogmus, Gemuendolepis, Haplacanthus, Homacanthus, Ischnacanthida, Ischnacanthiformes, Latviacanthus, Lupopsyroides, Lupopsyrus, Machaeracanthidae, Monopleurodus, Neoasiacanthus, Nodacosta, Nodonchus, Paucicanthus, Pinnacanthus, Promesacanthus, Ptychodictyon, Seretolepis, Striacanthus, Tchunacanthidae, Yealepis
Subtaxa: Leptocheles Naulas Onchus
Type: Onchus
Ecology: nektonic carnivore
Distribution:
• Permian of the Russian Federation (1 collection)
• Devonian of Bolivia (1), Canada (1: Nova Scotia), Iran (1), Norway (1), the United Kingdom (1), United States (2: Ohio, Wyoming)
• Silurian of Czechia (1), Estonia (3), the United Kingdom (6)
Total: 18 collections including 23 occurrences