Celleporidae Lamouroux, 1821
Osthimosia amplexa Gordon, 1989
Osthimosia ansata (Busk, 1881)
Osthimosia armatissima Moyano, 1991
Osthimosia avicularis Gordon, 1989
Osthimosia benemunita (MacGillivray, 1887)
Osthimosia bicornis (Busk, 1881)
Osthimosia clavata Waters, 1904
Osthimosia claviformis Hayward, 1993
Osthimosia curtioscula Hayward, 1992
Osthimosia cyclops Uttley & Bullivant, 1972
Osthimosia dubia (Uttley & Bullivant, 1972)
Osthimosia eatonensis (Busk, 1881)
Osthimosia erecta Liu & Hu, 1991
Osthimosia fusticula Hayward, 1992
Osthimosia glomerata (MacGillivray, 1887)
Osthimosia imperforata Gordon, 1984
Osthimosia incomposita Gordon, 1984
Osthimosia magna Moyano, 1974
Osthimosia malingae Hayward, 1992
Osthimosia mamillata Moyano, 1974
Osthimosia mariae Hayward, 1992
Osthimosia monilifera Taylor, Schembri & Cook, 1989
Osthimosia mysterium Gordon, 1989
Osthimosia notialis Hayward, 1992
Osthimosia parasitica (Busk, 1859 not Michelin)
Osthimosia parvula Jullien, 1903
Osthimosia phalacrocoraca Hayward, 1992
Osthimosia pustulata (Busk, 1881)
Osthimosia rogicki Hayward, 1980
Osthimosia rudicula Hayward, 1992
Osthimosia rudis (Busk, 1881)
Osthimosia signata (Busk, 1881)
Osthimosia simonensis (Busk, 1881)
Osthimosia sirena Gordon, 2009
Osthimosia socialis Taylor, Schembri & Cook, 1989
Osthimosia turrita Gordon, 1989
Osthimosia virgula Gordon, 1984