Analysis confirms genetic distribution of nemerteans in Russian and Japanese waters, suggesting trans-Arctic links.
The occurrence of in Peter the Great Bay, Sea of Japan, has been confirmed by an analysis of cytochrome c oxidase subunit 1 (COI) gene fragments. The sequences of four specimens from the Sea of Japan belong to the same haplotype and differ from the sequences of the specimens from the White and North Seas by 3–5 substitutions. This is the first hoplonemertean species whose trans-Arctic distribution range has been confirmed at the genetic level. The studied specimens from Aniva Bay (Sakhalin Island) belong to the same haplotype as the specimens from Akkeshi Bay and Ibaraki Prefecture, Japan.
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A.A. Martynova (2025) studied this question.
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