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Redescription of Bradleya japonica Benson, 1972 (Ostracoda) from the Sea of Japan and the significance of its shell shape from an optical point of view

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The marine podocopid ostracod, Bradleya japonica Benson, 1972 is redescribed on the basis of appendages and adult valves. This is the first report describing the appendages of the species. The reflectivity of the shells abruptly increases around an incident angle of 70°, and the reflectivity reaches to ca. 50% around an incident angle of 85° from the possible life position of this animal. Based on optical and morphological analyses, Bradleya japonica has a shell shape that minimizes reflection from the shell under the downwelling light conditions in which it lives. L'ostracode podocopidé marin, Bradleya japonica Benson, 1972 est re-décrit sur la base des appendices et des valves chez l'adulte. Ceci est le premier travail décrivant les appendices de cette espèce. La pouvoir de réflexion de la carapace augmente abruptement pour un angle incident de 70°, et la réflectivité atteint environ 50% pour une angle incident de 85°, ce qui peut correspondre à la position de l'animal vivant. Sur la base d'analyses optiques et morphologiques, Bradleya japonica a une forme de carapace qui minimise la réflexion sur la carapace sous les conditions de la lumière incidente dans laquelle il vit.

Affiliations: 1: Department of Geology & Mineralogy, Kyoto University, Kitashirakawa Oiwake-cho, Sakyo-ku, Kyoto 606-8502, Japan; 2: Department of Biology & Geosciences, Shizuoka University, Oya 836, Suruga-ku, Shizuoka 422-8529, Japan

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/content/journals/10.1163/156854009x454603
2009-09-01
2016-09-27

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