After "The Tree of Life" and Felley, Vecchione, Roper, Sweeney & Christensen, 2001-
<==o Onychoteuthidae Gray, 1849
|-- Kondakovia longimana Filippova, 1972
|--o Moroteuthis Verrill, 1881 [status doubtful]
| |-- M. robusta (Verrill, 1876)
| |-- M. ingens Smith, 1881
| |-- M. knipovitchi Filippova, 1972
| |-- M. lonnbergii Ishikawa & Wakiya, 1914 [M. lönnbergii]
| `-- M. robsoni Adam, 1962
|-- Notonykia africanae Nesis, Roeleveld & Nikitina, 1998
|--o Onychoteuthis Lichtenstein, 1818
| |-- O. banksii (Leach, 1817)
| |-- O. borealijaponica Okada, 1927
| |-- O. compacta (Berry, 1913)
| |-- O. meridiopacifica Rancurel & Okutani, 1990
| |-- O. sp. 1
| `-- O. sp. 2
`--o Onykia Lesueur, 1821 [status doubtful]
|-- O. carriboea Lesueur, 1821
|-- O. appellofi (Pfeffer, 1900) [O. appellöfi]
|?- O. ?indica Okutani, 1981
|?- O. intermedia (Pfeffer, 1912) [status doubtful]
|?- O. platyptera (d'Orbigny, 1834 in Ferussac & d'Orbigny, 1834-1848) [status doubtful]
|?- O. ?rancureli Okutani, 1881
`?- O. ?verrilli (Pfeffer, 1900)
Reference(s):
Felley, J., Vecchione, M., Roper, C. F. E., Sweeney, M. & Christensen, T., 2001-2003: Current Classification of Recent Cephalopoda.
–iNet: National Museum of Natural History: Departent of Systematic Biology: Invertebrate Zoology: http://www.mnh.si.edu/cephs/
–iNet: The Tree of Life Project: http://tolweb.org/