Karling T.G. (1982) Anatomy and taxonomy of Phonorhynchus Graff (Turbellaria), with special reference to P. helgolandicus (Mecznikow) Zoologica Scripta 11: 165-171
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Karling, T. G.
1982
Anatomy and taxonomy of Phonorhynchus Graff (Turbellaria), with special reference to P