| Plagiostomum brandtneri Kulinitch, 1980 | | w | primary taxonomic authority (describer) | 1290 |
| Plagiostomum cuticulata (Brandtner, 1934) | | w | latest taxonomic authority | |
| Plagiostomum cuticulata cuticulata (Brandtner, 1934) | [with synonyms] | w | latest taxonomic authority | |
| Brachyposthia cuticulata (1) Brandtner, 1934 | | w | latest taxonomic authority | |
| Plagiostomidae Brachyposthia Brandtner, 1934 | | w | latest taxonomic authority | |
| Plagiostomum girardi groenlandica Levinsen, 1879 | [with synonyms] | w | latest taxonomic authority | |
| Plagiostomum girardi hymani Karling, 1962 | [with synonyms] | w | latest taxonomic authority | |
| Plagiostomum hymani Karling, 1962 | | w | latest taxonomic authority | |
| Plagiostomum oyense de Beauchamp, 1921 | | w | latest taxonomic authority | |
| Plagiostomum productum Riedl, 1959 | | w | latest taxonomic authority | |
| Plagiostomum parasitorum Brandtner, 1934 | | w | latest taxonomic authority | |
| Plagiostomum xenophilum Riedl, 1959 | | w | latest taxonomic authority | |
| Plagiostomum spadix Riedl, 1959 | | w | latest taxonomic authority | |
| Plagiostomum spongiphilum (Riedl, 1959) | [with synonyms] | w | latest taxonomic authority | |
| Plagiostomum anocelis Brandtner, 1934 | | w | latest taxonomic authority | 1290 |