Polychaeta taxon details
original description
Moore, J.P. (1908). Some polychaetous annelids of the northern Pacific coast of North America. <em>Proceedings of the Academy of Natural Sciences of Philadelphia.</em> 60: 321-364., available online at https://www.biodiversitylibrary.org/page/6396551 page(s): 325-328, text-figs. a-c on page 326 [details]
redescription
San Martín, G.; López, E.; Aguado, M.T. 2009. Revision of the genus <i>Pionosyllis</i> (Polychaeta: Syllidae: Eusyllinae), with a cladistic analysis, and the description of five new genera and two new species. Journal of the Marine Biological Association of the United Kingdom 89(7): 1455-1498 page(s): 1486-1487, figs. 15A-C, 16A-E [details]
Holotype USNM 5532, geounit Alaskan part of the North Pacific Ocean [details]
Paratype ANSP 1976, geounit Vancouver Island [details]
Paratype USNM 1975, geounit Alaskan part of the North Pacific Ocean [details]
From editor or global species database
Depth range 75-399 m. [details]
Distribution Northeastern Pacific Ocean: Alaska (USA); Vancouver Island (Canada). [details]
Etymology The specific epithet gigantea, feminine of the Latin adjective giganteus, meaning 'giant', either refers to the big size of the species, stated to "represent a species much larger than P. magnifica" (Moore, 1908: 326), or to the big size of the anterior dorsal cirri, as "the most striking characteristic of the species is the great length of the anterior dorsal cirri which form a tangled mass at the sides of the body" (Moore, 1908: 327). [details]
Habitat Gravel, sponges, and muddy sediment mixed with rocks or volcanic sand. [details]
Specimen Holotype USNM 5532: anterior fragment of 40 segments, 16 mm long, 7 mm wide including chaetae. Paratype ANSP 1975: in two pieces, anterior fragment of 25 segments, 6.3 mm long, 4.7 mm wide including chaetae. Paratype USNM 1976: anterior fragment of 26 segments, 6.2 mm long, 4.7 mm wide including chaetae. [details]
Type locality Northeastern Pacific, SW Alaska (U.S.A.), Albatross sta. 4228, vicinity of Naha Bay, Behm Canal, 41-134 fathoms, gravel and sponges. Location of Albatross sta. 4228 according to Oceanographic Data Sets for NMNH Invertebrate Collections: North Pacific Ocean, Alaska, Alexander Archipelago, Revillagigedo Island, Behm Canal, Naha Bay, Indian Point (lat. 55º36'00''N; long. 131º41'00''W); 41-134 fathoms (75-245 m), gravel and sponges. [details]
Type material Type material deposited at the Smithsonian Institution, Washington, USA (holotype USNM 5532), and Academy of Natural Sciences, Philadelphia, USA (paratype ANSP 1975 and paratype 1976). [details]
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