Morphology and Taxonomy of Marine Benthic Diatoms (11), Genus <i>Seminavis </i>(<i>Naviculaceae</i>, <i>Naviculales</i>) (Part 2)

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  • SASANO Nagi
    Kanagawa Prefectural Yokohama-Midorigaoka Senior High School Graduate School of Marine Science and Technology, Tokyo University of Marine Science and Technology
  • SUZUKI Hidekazu
    Graduate School of Marine Science and Technology, Tokyo University of Marine Science and Technology
  • OSADA Keigo
    The Nippon Dental University School of Life Dentisrty at Niigata
  • KAMIYA Mitsunobu
    Graduate School of Marine Science and Technology, Tokyo University of Marine Science and Technology

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Other Title
  • 海産底生珪藻の形態と分類（11），クチビルマガイケイソウ属 （フナガタケイソウ科，フナガタケイソウ目）（第2部）
  • カイサン テイセイ ケイソウ ノ ケイタイ ト ブンルイ(11)クチビルマガイケイソウゾク(フナガタケイソウカ,フナガタケイソウモク)(ダイ2ブ)

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Abstract

<p>Seminavis exigua Chen, Zhuo & Gao (Naviculaceae, Naviculales), a brackish water and marine benthic diatom, is reported as new to Japan. It was found on Cladophora sp. and sea bottom sand obtained from the coasts of Yokohama, Kanagawa Pref. and Teuri Island, Hokkaido. Its morphology has been examined by light and scanning electron microscopies. The following morphological features of this species are first revealed in detail through the present study. The ventral axial area is narrow, and the accessory rib is not developed. The mature cingulum consists of four non-areolae bands with alternating orientation: a broad valvocopula, the short segmental 2nd and 4th bands, and the narrow 3rd band.</p>

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