†family Onychopterellidae Lamsdell 2011 (eurypterid)
Euchelicerata - Eurypterida - Onychopterellidae
Synonym: Alkenopteridae Poschmann and Tetlie 2004
Parent taxon: Onychopterelloidea according to J. A. Dunlop et al. 2013
See also Dunlop et al. 2020
Sister taxa: none
Subtaxa: Alkenopterus Onychopterella Tylopterella
Type: Onychopterella
Ecology: nektobenthic carnivore
Distribution:
• Devonian of Germany (1 collection)
• Silurian of Canada (1: Ontario), United States (3: Illinois, Indiana)
• Ordovician of South Africa (1)
Total: 6 collections each including a single occurrence