| Cylindrostoma laetum Riedl, 1959 | | w | primary taxonomic authority (describer) | |
| Cylindrostoma zooxanthella (Graff, 1886) | [with synonyms] | w | latest taxonomic authority | |
| Plagiostomidae Akamptostoma Riedl, 1959 | | w | primary taxonomic authority (describer) | |
| Akamptostoma spongiphilum Riedl, 1959 | | w | primary taxonomic authority (describer) | |
| Plagiostomum cavernae (Riedl, 1959) | [with synonyms] | w | primary taxonomic authority (describer) | |
| Plagiostomum productum Riedl, 1959 | [with synonyms] | w | primary taxonomic authority (describer) | |
| Plagiostomum spadix Riedl, 1959 | [with synonyms] | w | primary taxonomic authority (describer) | |
| Plagiostomum spongiphilum (Riedl, 1959) | [with synonyms] | w | primary taxonomic authority (describer) | |
| Plagiostomum xenophilum Riedl, 1959 | | w | primary taxonomic authority (describer) | |
| Plicastoma cavernae Riedl, 1959 | | w | primary taxonomic authority (describer) | |
| Plicastoma glaucum Riedl, 1959 | | w | primary taxonomic authority (describer) | |
| Plicastoma productum (Riedl, 1959) | | w | primary taxonomic authority (describer) | |
| Plicastoma spadix (Riedl, 1959) | | w | primary taxonomic authority (describer) | |
| Plicastoma xenophthalmum Riedl, 1959 | | w | primary taxonomic authority (describer) | |
| Vorticeros rudis Riedl, 1959 | | w | primary taxonomic authority (describer) | |
| Plagiostomum glaucum (Riedl, 1959) | [with synonyms] | - | primary taxonomic authority (describer) | 79 |
| Plagiostomum xenophthalmum (Riedl, 1959) | [with synonyms] | w | primary taxonomic authority (describer) | 79 |
| Plagiostomum rudis (Riedl, 1959) | [with synonyms] | - | primary taxonomic authority (describer) | 79 |
| Plicastoma spongiphilum (Riedl, 1959) | | w | primary taxonomic authority (describer) | |