| Cylindrostoma myfflum Marcus, 1951 | | w | latest taxonomic authority | |
| Prolecithophora Gastropharyngidae Meixner, 1938 | | w | latest taxonomic authority | |
| Gastropharyngidae Gastropharynx Meixner, 1938 | | w | latest taxonomic authority | |
| Gastropharynx limophilus Riedl, 1956 | | w | latest taxonomic authority | |
| Prolecithophora Ulianiniidae Levinsen, 1879 | | w | latest taxonomic authority | 505, 506 |
| Pseudostomidae Ulianinia Levinsen, 1879 | [with synonyms] | w | other taxonomic work | 505-506 |
| Ulianinia contractilis (Meixner, 1938) | [with synonyms] | w | latest taxonomic authority | 504-505 |
| Ulianinia mollissima Levinsen, 1879 | [with synonyms] | w | latest taxonomic authority | 495-502, Figs. 1-8, Plate 18 |
| Klattia virginiensis Kepner, Stirewalt & Ferguson, 1939 | | w | latest taxonomic authority | |
| Macrorhynchus goetti (Bresslau, 1906) | | w | latest taxonomic authority | |
| Polycystis roosevelti Graff, 1911 | | w | latest taxonomic authority | |
| Plagiostomula vivipara (l) Westblad, 1956 | | w | latest taxonomic authority | |
| Plagiostomula vivipara (2) Westblad, 1956 | | - | latest taxonomic authority | |
| Ulianinia westbladi Karling, 1963 | | w | primary taxonomic authority (describer) | 502-504, Fig. 9, Plate 19 |
| Diascorhynchus lappvikensis Karling, 1963 | | w | primary taxonomic authority (describer) | |
