| Scientific Name | TSN | Taxon Author | Common Name | Name Source | Usage | Reason (ITIS) | Taxon Rank |
|---|
| Kinorhynchus | 705143 | Sheremetevskij, 1974 | | ITIS | valid | | Genus |
| Pycnophyes | 59470 | Zelinka, 1907 | | ITIS | valid | | Genus |
| Pycnophyes denticulatus | 204341 | (Zelinka, 1928) | | ITIS | invalid | nomen dubium of Pycnophyes | Species |
| Pycnophyes echinoderoides | 705273 | Zelinka, 1928 | | ITIS | invalid | nomen dubium of Pycnophyes | Species |
| Pycnophyes neopolitanus | 705255 | Bacescu, 1968 | | ITIS | invalid | other, see comments of Pycnophyes | Species |
| Trachydemus | 59474 | Zelinka, 1907 | | ITIS | invalid | junior homonym of Kinorhynchus | Genus |
