Chernyshev A.V. 2019. Phaeodaria from the northwestern Pacific, with description of a new species, Challengeron tochilinae // Invertebrate Zoology. Vol.16. No.4: 393–397 [in English].

National Scientific Center of Marine Biology, Far Eastern Branch, Russian Academy of Sciences, Vladivostok 690041, Russia. E-mail:

doi: 10.15298/invertzool.16.4.06

ABSTRACT: New data on the morphological variability and scanning electron microphotographs of the following species are provided: Aulographis japonica Nakamura, Tuji et Suzuki, 2013, Protocystis vicina Reshetnjak, 1952, and Haeckeliana megalodonta Reshetnjak, 1952. Aulographis japonica has been first found in the northwestern Sea of Japan. It is suggested that Protocystis ornitocephala Reshetnjak, 1952 and P. vicina may be synonyms. A new species, Challengeron tochilinae sp.n., is described from specimens collected in the Sea of Okhotsk.

KEY WORDS. Phaeodarians, Aulographis, Haeckeliana, Protocystis, Challengeron, Sea of Japan, Sea of Okhotsk.

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