Nomenclature
original description (unavailable nomenclaturally)
Karling T.G. (1982) Anatomy and taxonomy of Phonorhynchus Graff (Turbellaria), with special reference to P. helgolandicus (Mecznikow) Zoologica Scripta 11: 165-171 [details] Available for editors
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From editor or global species database
Taxonomic remark Is not a subspecies, but was described as a 'forma' by Karling (1982). [details]