Diacarnus is 'n genus van sponsdiere uit die klas van die Demospongiae (gewone sponse). Diacarnus ardoukobae (Kelly-Borges & Vacelet, 1995) Diacarnus bellae (Kelly-Borges & Vacelet, 1995) Diacarnus bismarckensis (Kelly-Borges & Vacelet, 1995) Diacarnus debeauforti (Burton, MS) Diacarnus erythraeanus (Kelly-Borges & Vacelet, 1995) Diacarnus globosus (Vacelet, Vasseur & Lévi, 1976) Diacarnus laevis (Lindgren, 1897) Diacarnus levii (Kelly-Borges & Vacelet, 1995) Diacarnus megaspinorhabdosa (Kelly-Borges & Vacelet, 1995) Diacarnus spinipoculum (Carter, 1879) Diacarnus tubifera (Kelly-Borges & Vacelet, 1995)