| author | date | title | journal / publication | Sopott-Ehlers B, Ehlers U | 2003 | Eyes covered by mitochondrial lenses in Petaliella spiracauda and Ptychopera purasjokii (Plathelminthes, Rhabdocoela, Trigonostominae). Ultrastructural features and phylogenetic implications. | Journal of Submicroscopic Cytology and Pathology, Volume: 35 Issue:4 Pages:415-421 |
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| Ptychopera purasjokii Ax, 1971 | w | other research on this sp. | ||
| Petaliella spiracauda Ehlers, 1974 | w | other research on this sp. |