Type species: Otionella australis Cook & Chimonides, 1985
This genus includes the species:
| (Cook & Chimonides, 1984) | Recent Pleistocene |
New Zealand | WoRMS 468394 | |
| Bock & Cook, 1998 | Neogene Miocene | Australia Victoria | WoRMS 1406100 | |
| Hara, Mörs, Hagström & Reguero, 2018 | Paleogene Eocene | Antarctica Seymour Island | WoRMS 1406101 | |
| (Cook & Chimonides, 1985) | Recent | Australia Bass Strait | WoRMS 468395 | |
| (Cook & Chimonides, 1985) | Recent Tertiary |
Australia Australia |
WoRMS 468396 | |
| Conroy, Cook & Bock, 2001 | Recent | W. Australia | WoRMS 468393 | |
| (Cook & Chimonides, 1985) | Tertiary | Australia | WoRMS 1412656 | |
| (Canu & Bassler, 1935) | Neogene Miocene Langhian | Australia Victoria. | WoRMS 1412657 | |
| (Tenison Woods, 1880) | Neogene Miocene | Australia | WoRMS 1412658 | |
| Hara, Mörs, Hagström & Reguero, 2018 | Paleogene Eocene | Antarctica Seymour Island | WoRMS 1406102 | |
| (Tenison Woods, 1880) | Neogene Miocene | Australia | WoRMS 1412659 | |
| (Stach, 1935) | Neogene Miocene | Australia | WoRMS 1412660 | |
| (Cook & Chimonides, 1984) | Tertiary | New Zealand | WoRMS 1412661 | |
| (Cook & Chimonides, 1985) | Recent | Australia Bass Strait | WoRMS 471918 | |
| (Maplestone, 1909) | Recent Tertiary |
Australia Australia, New Zealand |
WoRMS 468397 | |
| Bock & Cook, 1998 | Paleogene Eocene - Oligocene | Australia Victoria | WoRMS 1406103 | |
| (Cook & Chimonides, 1984) | Recent Tertiary |
New Zealand, Australia New Zealand |
WoRMS 468398 | |
| (Tenison Woods, 1880) | Recent Pleistocene |
New Zealand, Australia New Zealand |
WoRMS 468399 | |
| (Cook & Chimonides, 1984) | Recent Pleistocene |
New Zealand | WoRMS 471917 | |
| (Cook & Chimonides, 1984) | Recent Tertiary |
New Zealand, Australia |
WoRMS 468400 |
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| Otionellina ampla | Otionellina australis | Otionellina boneae | Otionellina cupola |
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| Otionellina paradoxa | Otionellina squamosa |