| author | date | title | journal / publication | Tsuyuki A, Oya Y, Kajihara H | 2019 | abs. | A New Species of Prosthiostomum (Platyhelminthes: Polycladida) from Shirahama, Japan. | Species Diversity Vol 24(2):137-143 |
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| Prosthiostomum torquatum Tsuyuki, Oya & Kajihara, 2019 | - | primary taxonomic authority (describer) | 138 |