| author | date | title | journal / publication | Leiper RT | 1902 | On an acoelous turbellarian inhabiting the common heart urchin. | Nature (Lond) 66: 641 |
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| Isodiametridae Avagina Leiper, 1902 | [with synonyms] | w | primary taxonomic authority (describer) | |
| Avagina incola Leiper, 1902 | [with synonyms] | w | primary taxonomic authority (describer) | 641 |
| Haplodiscus incola (Leiper, 1902) | w | primary taxonomic authority (describer) | ||
| Convolutidae Avagina Leiper, 1902 | - | primary taxonomic authority (describer) |