| Thalassotyphloplanida Promesostomidae den Hartog, 1964 | | w | primary taxonomic authority (describer) | |
| Trigonostomidae Ceratopera den Hartog, 1964 | [with synonyms] | w | primary taxonomic authority (describer) | 399-400 |
| Ceratopera levinseni den Hartog, 1964 | | w | primary taxonomic authority (describer) | 403-404, Fig. 11 E-F |
| Trigonostomidae Ptychopera den Hartog, 1964 | | w | primary taxonomic authority (describer) | |
| Thalassotyphloplanida Trigonostomidae Graff, 1905 | [with synonyms] | w | latest taxonomic authority | |
| Ceratopera axi (Riedl, 1954) | [with synonyms] | w | other taxonomic work | 406-407, Fig. 11 K |
| Beklemischeviella contorta (Beklemischev, 1927) | [with synonyms] | w | other taxonomic work | 384-385, Fig 3A-B |
| Beklemischeviella brevistyla Beklemischev, 1953 | | w | other taxonomic work | 385, Fig. 3 C |
| Beklemischeviella angustior Luther, 1943 | | w | other taxonomic work | 385-386, fig. 3 D |
| Ptychopera westbladi (Luther, 1943) Den Hartog, 1964 | [with synonyms] | w | other taxonomic work | 387-393, Fig. 4-7, Pl. 1A-B |
| Ptychopera plebeia (Beklemischev, 1927) | [with synonyms] | w | other taxonomic work | 393-395, Fig. 8 |
| Ptychopera tuberculata (Graff, 1882) | [with synonyms] | w | latest taxonomic authority | 395-398, Fig. 9-10, Pl. 1 C-D |
| Ceratopera gracilis (Graff, 1882) | [with synonyms] | w | other taxonomic work | 400-402, Fig. 11 A-B |
| Ceratopera sellai (Steinböck, 1933) | [with synonyms] | w | other taxonomic work | 402-403, Fig. 11 C-D |
| Ceratopera reisingeri (Riedl, 1959) | [with synonyms] | w | other taxonomic work | 404-405, Fig. 11 G |
| Ceratopera steinboecki (Riedl, 1959) | [with synonyms] | w | other taxonomic work | 405-406, Fig. 11 H |
| Ceratopera paradoxa (Pereyaslawzewa, 1892) | [with synonyms] | w | other taxonomic work | 406, Fig. 11 J |
| Vejdovskya halileimonia Ax, 1960 | | w | other research on this sp. | 398 |
| Ceratopera flabellifera (den Hartog, 1964) | [with synonyms] | w | primary taxonomic authority (describer) | ?p=taxdetails&id=1526987 |
| Ptychopera hartogi Ax, 1971 | | w | other taxonomic work | 395-398 |