Hydrozoa source details
Namikawa H. (1991). A new species of the genus Stylactaria (Cnidaria, Hydrozoa) from Hokkaido, Japan. Zoological Science. 8: 805-812.
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Namikawa H.
1991
A new species of the genus Stylactaria (Cnidaria, Hydrozoa) from Hokkaido, Japan
Zoological Science
8: 805-812.
Publication
A new species of athecate hydroid, Stylactaria multigranosi sp. nov., is described based on specimens from Hokkaido, Japan. Of 416 colonies collected, all of the mature ones (N = 306) were female. Hydroids of S. multigranosi were associated exclusively with a gastropod, Nassarius multigranosus (Dunker, 1847), living on sandy-mud bottoms. This new species is characterized by having fixed eumedusoid gonophores without marginal tentacles. Eggs is S. multigranosi develop into planulae within the gonophores. Four types of zooids (gastrozooids, normal gonozooids, non-hypostomed gonozooids and tentaculozooids) were discovered. The taxonomy of Stylactaria is briefly discussed, with particular reference to morphology of gonophores and intercolonial variation in zooid polymorphism.Descriptors: STYLACTARIA MULTIGRANOSI new species, Hydractinia multigranosifigs. 1-3, tabs. 1-7. (viii.1991).
Japan
Systematics, Taxonomy
Hydractinia spiralis Goto, 1910 (additional source)
Stylactaria claviformis (Bouillon, 1965) accepted as Hydractinia proboscidea (Hincks, 1868) (basis of record)
Stylactaria misakinensis (Iwasa, 1934) accepted as Bouillonactinia misakiensis (Iwasa, 1934) (basis of record)
Stylactaria multigranosi Namikawa, 1991 accepted as Bouillonactinia multigranosi (Namikawa, 1991) (original description)
Stylactaria spinipapillaris (Hirohito, 1988) accepted as Hydractinia spinipapillaris (Hirohito, 1988) (basis of record)
Stylactaria claviformis (Bouillon, 1965) accepted as Hydractinia proboscidea (Hincks, 1868) (basis of record)
Stylactaria misakinensis (Iwasa, 1934) accepted as Bouillonactinia misakiensis (Iwasa, 1934) (basis of record)
Stylactaria multigranosi Namikawa, 1991 accepted as Bouillonactinia multigranosi (Namikawa, 1991) (original description)
Stylactaria spinipapillaris (Hirohito, 1988) accepted as Hydractinia spinipapillaris (Hirohito, 1988) (basis of record)
Sea of Japan for Stylactaria multigranosi Namikawa, 1991
Type locality
Oshoro Bay, Hokkaido, Japan; 2 m depth; on Nassarius multigranosus (Dunker, 1847); 43°12'N, 140°47'E. [details]