Type species: Hippothoa divaricata Lamouroux, 1821
Several genera and subgenera have been distinguished from the genus Hippothoa s.s. over the past few years. Consequent changes to status of some species listed below have not been verified.
This genus includes the species:
| Hippothoa aruensis | Morris, 1980 | Recent | Indo-Pacific |
| Hippothoa balanophila | Winston & Håkansson, 1986 | Recent | Florida |
| Hippothoa braziliensis | Morris, 1980 | Recent | Brazil |
| Hippothoa calciophilia | Gordon, 1984 | Recent | New Caledonia, NE Australia |
| Hippothoa catenifera | (Norman, 1894) | Recent | N. Atlantic |
| Hippothoa distans | (MacGillivray, 1869) | Recent | Widespread |
| Hippothoa divaricata | Lamouroux, 1821 | Recent | Widespread |
| Hippothoa divaricata arctica | Kluge, 1906 | Recent | Arctic |
| Hippothoa divaricata pacifica | Gordon, 1984 | Recent | SW Pacific |
| Hippothoa expansa | Dawson, 1859 | Recent | N. Atlantic, N. Pacific |
| Hippothoa flagellum | Manzoni, 1870 | Recent Pliocene |
Widespread Italy |
| Hippothoa mawatarii | Dick & Ross, 1988 | Recent | Alaska |
| Hippothoa meridionalis | Morris, 1980 | Recent | Antarctic |
| Hippothoa minitumulosa | Morris, 1980 | Recent | Mexico, California |
| Hippothoa musivaria | Hayward & Fordy, 1982 | Recent | S. Africa |
| Hippothoa naredensis | Terawi & Srivastava, 1967 | Holocene | India |
| Hippothoa parvipora | Canu & Lecointre, 1928 | Tertiary | France |
| Hippothoa peristomata | Gordon, 1984 | Recent | SW Pacific |
| Hippothoa rudis | Canu & Lecointre, 1928 | Tertiary | France |
| Hippothoa rugulosa | (Reuss, 1873) | Tertiary | Europe |
| Hippothoa santacruzana | Pinter, 1973 | Recent | California |
| Hippothoa watersi | Morris, 1980 | Recent | New Zealand, Australia, S. Indian O. |
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| Hippothoa divaricata pacifica (Identification provisional) |
Hippothoa flagellum |
Harmer notebook - entry for Hippothoa
Harmer notebook - entry for Hippothoida