†family Onychopterellidae Lamsdell 2011 (eurypterid)
Eurypterida - Onychopterellidae
Parent taxon: Onychopterelloidea according to J. C. Lamsdell 2025
See also Dunlop et al. 2013
Sister taxa: none
Subtaxa: Onychopterella Tylopterella
Type: Onychopterella
Ecology: nektobenthic carnivore
Distribution:
• Silurian of Canada (1: Ontario collection), United States (3: Illinois, Indiana)
• Ordovician of South Africa (1)
Total: 5 collections each including a single occurrence