| Promesostomidae Westbladiella Luther, 1943 | | w | other taxonomic work | |
| Praeaphanostoma sizilianum (Riedl, 1954) | [with synonyms] | w | primary taxonomic authority (describer) | |
| Mecynostomum sizilianum Riedl, 1954 | | w | primary taxonomic authority (describer) | 160-167; figs 1-3 |
| Acoela Myostomellidae Riedl, 1954 | | w | primary taxonomic authority (describer) | |
| Myostomellidae Myostomella Riedl, 1954 | | w | primary taxonomic authority (describer) | |
| Myostomella pulchella Riedl, 1954 | | w | primary taxonomic authority (describer) | 167-188; figs 4-10 |
| Cylindrostoma luridum Riedl, 1954 | | w | primary taxonomic authority (describer) | 197-200; figs 15-16 |
| Protomonotresinae Prorogonophora Riedl, 1954 | [with synonyms] | w | primary taxonomic authority (describer) | |
| Prorogonophora perspicua Riedl, 1954 | | w | primary taxonomic authority (describer) | 188-197; figs. 11-14 |
| Protomonotresinae Propozonopora Riedl, 1954 | | w | primary taxonomic authority (describer) | |
| Plagiostomum sorrentinum Riedl, 1954 | | w | primary taxonomic authority (describer) | 200-210; figs 17-21 |
| Westbladiella angulifera Riedl, 1954 | | w | primary taxonomic authority (describer) | 215-217; fig 25 |
| Westbladiella falcifera Riedl, 1954 | | w | primary taxonomic authority (describer) | 211-214; figs 22-25 |
| Ceratopera axi (Riedl, 1954) | [with synonyms] | w | primary taxonomic authority (describer) | 217-220; fig 26-27 |
| Proxenetes axi Riedl, 1954 | | w | primary taxonomic authority (describer) | 217-220; fig 26-27 |
| Trigonostomum quadrifolium Riedl, 1954 | | w | primary taxonomic authority (describer) | 220-223; fig 28 |
| Protoplanellinae Lioniella Riedl, 1954 | | w | primary taxonomic authority (describer) | |
| Lioniella petiti Riedl, 1954 | | w | primary taxonomic authority (describer) | 232-236; fig 33-34 |
| Haloplanella multifida Riedl, 1954 | | w | primary taxonomic authority (describer) | 236-241; figs 35-37 |
| Typhloplaninae Marinellia Riedl, 1954 | | w | primary taxonomic authority (describer) | |
| Marinellia lingulifera Riedl, 1954 | | w | primary taxonomic authority (describer) | 223-231; fig 30-32 |
| Westbladiella obliquepharynx Luther, 1943 | [with synonyms] | w | other taxonomic work | 216-217, figs. 22 C, 25 C |
