| author | date | title | journal / publication | Sluys R, Kawakatsu M, & Ponce de León R | 2005 | abs. | Morphological stasis in an old and widespread group of species: Contribution to the taxonomy and biogeography of the genus Girardia (Platyhelminthes, Tricladida, Paludicola) | Studies on Neotropical Fauna and Environment, 40(2):155-180 |
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