Polychaeta taxon details
original description
Radashevsky, V.I.; Pankova, V.V. (2006). The morphology of two sibling sympatric <i>Polydora</i> species (Polychaeta: Spionidae) from the Sea of Japan. <em>Journal of the Marine Biological Association of the United Kingdom.</em> 86(2): 245-252., available online at https://doi.org/10.1017/s0025315406013099 page(s): 249-250, figs. 4-5 [details]
Holotype IMBFE IMBV 14805, geounit Peter the Great Bay [details]
Paratype IMBFE IMBV 14806, geounit Peter the Great Bay [details]
From editor or global species database
Depth range 9 m. [details]
Distribution West Pacific Ocean: Vostok Bay (Peter the Great Bay, Sea of Japan). Known only from the type locality. [details]
Etymology The species is dedicated to Gennady Petrovich Manchenko (Institute of Marine Biology, Vladivostok, Russia), who discovered the new species during his electrophoretic survey of Polydora. [details]
Habitat The species bores into shells of gastropods occupied by hermit crabs in shallow water, with up to five individuals boring into one shell. [details]
Reproduction Gonochoristic with almost equal sex allocation. Both in females and males, gametes develop along segmental blood vessels in middle segments, from chaetigers 13-17 to 30-59. Tests in males contain only spermatogonia. Separate spermatocytes I, diads of spermatocytes II, tetrads of spermatids 4 µm in diameter, and mature spermatozoa float together in the coelomic fluid. Spermatozoa are introsperm with elongated straight head about 1 µm in diameter, head + middlepiece 11 µm, acrosome 1.5 µm, nucleus 5 µm, middlepiece 4.5 µm, and flagellum 54 µm long. [details]
Type locality West Pacific Ocean, Sea of Japan, Peter the Great Bay, Vostok Bay, near the 'Vostok' Marine Biological Station, of the Institute of Marine Biology (42º53.6'N, 132º44.1'E), 9 m, from shells of gastropod Cryptonatica janthostoma occupied by Pagurus ochotensis. [details]
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