| Adenorhynchidae Adenorhynchus Meixner, 1938 | | w | latest taxonomic authority | 16 |
| Adenorhynchus balticus Meixner, 1938 | | w | latest taxonomic authority | 16-21, Fig. 6-8 |
| Neoschizorhynchus parvorostro Ax & Heller, 1970 | | w | primary taxonomic authority (describer) | 36-43, Figs. 17-20 |
| Promesostomidae Adenorhynchinae Ax & Heller, 1970 | | w | primary taxonomic authority (describer) | 15-16 |
| Adenorhynchidae Listea Ax & Heller, 1970 | | w | primary taxonomic authority (describer) | 27 |
| Listea simplex Ax & Heller, 1970 | | w | primary taxonomic authority (describer) | 27-33, Figs. 12-15 |
| Adenorhynchidae Litucivis Ax & Heller, 1970 | | w | primary taxonomic authority (describer) | 21 |
| Litucivis serpens Ax & Heller, 1970 | | w | primary taxonomic authority (describer) | 21-27, Figs. 9-11 |
| Trigonostomidae Mariplanellinae Ax & Heller, 1970 | | w | primary taxonomic authority (describer) | 6-7 |
| Mariplanidae Mariplanella Ax & Heller, 1970 | | w | primary taxonomic authority (describer) | 7 |
| Mariplanella frisia Ax & Heller, 1970 | | w | primary taxonomic authority (describer) | 7-15, Figs. 1-5 |
| Haloplanella longatuba Ax & Heller, 1970 | | w | primary taxonomic authority (describer) | 33-36, Fig. 16 |
| Rhabdocoela Mariplanellida Ax & Heller, 1970 | | w | primary taxonomic authority (describer) | 578-579 |
| Mariplanellida Mariplanidae Ax & Heller, 1970 | [with synonyms] | w | primary taxonomic authority (describer) | |
| Thalassotyphloplanida Adenorhynchidae Ax & Heller, 1970 | [with synonyms] | w | primary taxonomic authority (describer) | 34,38 |