Type species: Flustra lacroixii Audouin, 1826
Family placement uncertain.
This genus includes the species:
| Conopeum eriophorum | (Lamouroux, 1816) | Recent | Indo-Pacific |
| Conopeum oretiensis | Uttley, 1951 | Recent | New Zealand |
| Conopeum osburni | Soule, Soule, & Chaney, 1995 | Recent | Northeast Pacific |
| Conopeum ponticum | Hayward, 2001 | Recent | GBR |
| Conopeum reticulum | (Linnaeus, 1767) | Recent | Cosmopolitan |
| Conopeum seurati | (Canu, 1928) | Recent | Europe, Florida, New Zealand; estuarine |
| Conopeum tenuissimum | (Canu, 1928) | Recent Pliocene |
Atlantic, California Gulf of Mexico |
| Conopeum truitti | Osburn, 1944 | Recent | West Atlantic |
| Conopeum tubigerum | Osburn, 1940 | Recent | West Atlantic |
| Conopeum vivianii | Moyano, 1991 | Recent | Chile |
Conopeum seurati - at the Smithsonian Marine Station at Fort Pierce, Florida.
Conopeum tenuissimum - at the Smithsonian Marine Station at Fort Pierce, Florida.
Conopeum sp. ; from the Oslofjord, Norway. At the Palaeontological Museum, University of Oslo
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