| Macrostomum gracile (2) Gieysztor, 1931 | | w | latest taxonomic authority | |
| Castrada (Castrada) infernalis Papi, 1951 | | w | primary taxonomic authority (describer) | 7-13, Figs. 7-19 |
| Castrada (Castrada) noemiae Papi, 1951 | | w | primary taxonomic authority (describer) | 4-7, f. 1-6 |
| Macrostomum curvata Papi, 1951 | [with synonyms] | w | primary taxonomic authority (describer) | |
| Castrada (Castrada) cristatispinosa Papi, 1951 | | w | primary taxonomic authority (describer) | 13-18, Figs. 20-26 |
| Castrada (Castrada) moroderi Gieysztor, 1931 | | w | other taxonomic work | 18 |
| Lutheria moroderi (Gieysztor, 1931) | [with synonyms] | w | latest taxonomic authority | 18 |
| Castrada (Castrada) stagnorum Luther, 1904 | [with synonyms] | w | other taxonomic work | 6, Fig. 4 |
| Castrada (Castrada) subsalsa Luther, 1946 | | w | other taxonomic work | 6 |