Onychohydrus es un género de escarabajos adéfagos perteneciente a la familia Dytiscidae.[1]
- Régimbart, M. 1879(1878): Étude sur la classification des Dytiscidae. Annales de la Société Entomologique de France (5), 8: 447–466.
- Schaum, H. 1847: Description of Onychohydrus. P. 7 in White, A. (ed.) Nomenclature of the coleopterous insects in the collection of the British Museum. Part II. Hydrocanthari. London: Edward Newman.
- White, A. 1846: Insects of New Zealand. Pp. 1-27, plates 1-7 in: Richardson, J.; Gray, J.E. (eds) The zoology of the voyage of H.M.S. Erebus & Terror, under the command of Captain Sir James Clark Ross, R.N., F.R.S., during the years 1839 to 1843. Vol. II. Reptiles, fishes, Crustacea, insects, Mollusca. London: E.W. Janson. Internet Archive Biodiversity Heritage Library
- Leschen, R.A.B.; Lawrence, J.F.; Kuschel, G.; Thorpe, S.; Wang, Q. 2003: Coleoptera genera of New Zealand. Archivado el 27 de mayo de 2010 en Wayback Machine. New Zealand entomologist, 26: 15-28.