Biodiversity of marine planarians revisited (Platyhelminthes, Tricladida, Maricola) Author Sluys, Ronald Author Kawakatsu, Masaharu text Journal of Natural History 2005 2005-02-28 39 6 445 467 http://dx.doi.org/10.1080/00222930410001671309 journal article 10.1080/00222930410001671309 1464-5262 5221453 Oregoniplana opisthopora Holmquist and Karling, 1972 Comparative discussion Thus far, this species has been reported in the scientific literature only from its type locality, Yaquina Head, Oregon , USA . However, in an unpublished student report Poljakova (1991) mentioned the species from Paramushir Island (Kuril Islands) and from the Komandorskiye Islands. Unfortunately, the report does not substantiate this finding and identification with drawings or photographs of the specimens from Kamchatka; the report merely reproduces figures of the external appearance and copulatory apparatus already published by Holmquist and Karling (1972) . Furthermore, the material studied by Poljakova (1991) could not be retrieved for re-examination. Although this record of O. opisthopora from Kamchatka may well be correct, and very interesting from a biogeographical point of view, we feel that it requires more supporting evidence.