12 research outputs found

    BRYOZOA OF KII PENINSULA

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    Cheilostomatous Bryozoa from the Kurile Islands and the Neighbouring Districts

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    Volume: 10Start Page: 113End Page: 13

    On Two Bryozoans from Hokkaido (With 3 Text-figures)

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    Studies on Japanese Anascan Bryozoa 8 : Division Malacostega (6)

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    Studies on Japanese Anascan Bryozoa 7 : Division Malacostega (5)

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    Studies on Japanese Anascan Bryozoa 9 : Division Malacostega (7)

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    Development and metamorphosis of the cyphonautes larva of Membranipora serrilamella Osburn

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    Membranipora serrilamella Osburn is very abundant on Japanese edible kelp Laminaria japonica Areshoug. Protandric gametogenesis, discharge of matured eggs and external fertilization were observed in the aquarium. Total-equal type of cleavage, formation of embryo, change of egg-membrane into shells of Cyphonautes were ascertained under the microscope. Morphology, behavior and settlement of larva and its metamorphosis into a twin-ancestrula and also early colonial formation were studied.Membranipora serrilamella Osburn est trĂšs abondant sur le Laminaria japonica Areshoug, varech japonais comestible. La gametogenĂšse protandrique, la libĂ©ration des oeufs mĂ»rs et la fertilisation externe ont Ă©tĂ© observĂ©es en aquarium. La division de type total-Ă©gal, la formation de l'embryon, la transformation de la membrane de l'oeuf en coquille de Cyphonautes ont Ă©tĂ© constatĂ©es au microscope. La morphologie, le comportement et la fixation de la larve, sa mĂ©tamorphose en une ancestrule double et aussi les premiers stades de la colonie ont Ă©tĂ© Ă©tudiĂ©s.Mawatari Shizuo, Mawatari Shunsuke F. Development and metamorphosis of the cyphonautes larva of Membranipora serrilamella Osburn. In: Documents des Laboratoires de GĂ©ologie de la FacultĂ© des Sciences de Lyon. Hors sĂ©rie n°3, 1975. Bryozoa 1974 – Proceedings of the third Conference International Bryozoology Association – Lyon (fasc. 1) pp. 13-18
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