Here we describe a new species of colonial entoproct Coriella chernyshevi n. sp. from the Sea of Okhotsk, western Pacific Ocean, found at depths of 305–624 m. This is the first record of an entoproct species for the Sea of Okhotsk. Coriella chernyshevi is a large species with a zooid length of 6–7 mm. The calyx bears 32–34 tentacles. Zooids extend from a central stem formed by closely adjoined stolons. Only one other species of Coriella has been described previously, Coriella stolonata Kluge, 1946, from the Arctic Ocean, found at a depth of 45 m. Coriella chernyshevi and C. stolonata share a same rigid stem structure, but they differ in zooid size and tentacle number. The only other barentsiid that has been described as having a rigid central stem is Pedicellinopsis fruticosa Hincks, 1884. Based on the presence of a central stem in colonies, and similarities in structure of zooids and colonies, we suggest a close relationship between Coriella and Pedicellinopsis. Finally, an overview of both genera and all three species is given.
Busk, G. (1886) Report on the Polyzoa collected by H.M.S. Challenger during the years 1873–1876. Part II—the Cyclostomata, Ctenostomata, and Pedicellinea. Report of the Scientific Results of the Voyage of H.M.S. Challenger (Zoology), 17, 1–47.
Emschermann, P. (1972) Loxokalypus socialis gen. et sp. nov. (Kamptozoa, Loxokalypodidae fam. nov.), ein neuer Kamptozoentyp aus dem nördlichen Pazifischen Ozean. Ein Vorschlag zur Neufassung der Kamptozoensystematik. Marine Biology, 12, 237–254.
Harmer, S.F. (1915) The Polyzoa of the Siboga Expedition, Part I: Entoprocta, Ctenostomata and Cyclostomata. Siboga Expeditie, 28a, 1–180. [pls 1–12]
Hincks, T. (1880) A History of the British Marine Polyzoa. 2 vols. Van Voorst, London. 600 pp.
Hincks, T. (1884) Contributions towards a General History of the Marine Polyzoa. XIII. Polyzoa from Victoria and Western Australia. Annals and Magazine of Natural History, 13 (5), 363–365.
Integrated Taxonomic Information System (ITIS) (2016) Integrated taxonomic information system on-line database. ITIS Partnership, Orrell, T., Acting Director, c/o Smithsonian Institution, Washington, DC. Available from: http://www.itis.gov (accessed 15 March 2016)
Johnston, G. (1847) A history of the British zoophytes. Van Voorst, London. 488 pp.
Johnston, T.H. & Walker, M.J. (1917) A new species of Pedicellina from Sydney Harbour. Proceedings of the Royal Society of Queensland, 29, 60–63.
King, D.K., King, R.H. & Miller A.C. (1988) Morphology and ecology of Urnatella gracilis Leidy, (Entoprocta), a freshwater macroinvertebrate from Artificial Riffles of the Tombigbee River, Mississippi. Journal of Freshwater Ecology, 4 (3), 351–360.
Kluge, H.A. (1946) Kamptozoa from the Arctic Ocean. In: Buinitski, V.K. (Ed.), Report of the Expedition to Drifting Ice in the Central Arctic Ocean in the Ice-breaking Steamer G. Sedov, 1937–1940. Vol. 3. pp. 149–157. [In Russian]
Leidy, J. (1851) On some American fresh-water Polyzoa. Proceedings of the Academy of Natural Sciences of Philadelphia, 5, 320–322.
Lukacsovics, F. & Pecsi, T. (1967) A new occurrence of Urnatella gracilis Leidy (Kamptozoa) in Hungary. Opuscula Zoologica (Budapest), 7 (2), 221–225.
MacGillivray, P.H. (1887) A catalogue of the marine Polyzoa of Victoria. Transactions and Proceedings of the Royal Society of Victoria, 23, 187–224.
Nielsen, C. (1989) Entoprocts: Keys and notes for the identification of the species. Synopses of the British Fauna (New Series), 41, 1–131.
Nitsche, H. (1869) Beiträge zur Kenntniss der Bryozoen. W. Engelmann, Leipzig. 180 pp.
Ryland, J.S. (1960) The occurrence of Pseudopedicelina mutabilis Toriumi (Entoprocta) in British waters, with a note on Pedicellina nutans Dalyell. The Annals and Magazine of Natural History (13 series), 3, 377–383.
Toriumi, M. (1951) Some Entoprocts found in Matsushima bay. The Science Reports of the Tohoku University, 4 series (Biology), 19 (1), 17–22.
Wasson, K. (2002) A review of the invertebrate phylum Kamptozoa (Entoprocta) and synopsis of kamptozoan diversity in Australia and New Zealand. Transactions of the Royal Society of South Australia, 126, 1–20.
Whitelegge, T. (1889) List of the marine and fresh-water invertebrate fauna of Port Jackson and the neighbourhood. Journal and Proceedings of the Royal Society of New South Wales, 23, 163–323.