Uzu-no-hira (Spiral striped worm) - Uzu-no-hira

Japanese: ウズオビムシ(渦帯虫) - ウズオビムシ
Uzu-no-hira (Spiral striped worm) - Uzu-no-hira
A general term (illustration) for protozoa belonging to the family Peridinidae of the order Dinoflagellates, or more broadly, the dinoflagellates. They live in plankton in the sea, ponds, and lakes. Their bodies are covered with two or more cellulose shell plates, which can be circular, spindle-shaped, conical, or anchor-shaped. A pit-like pattern can be seen on the surface of the shell plates. The shell plates also have a horizontal groove surrounding the body and a short vertical groove, with one wavy horizontal flagellum passing through the horizontal groove and the vertical flagellum hanging backwards. Marine species are bioluminescent, and sometimes occur abnormally, causing red tides.

Source: Heibonsha World Encyclopedia, 2nd Edition Information

Japanese:
渦鞭毛虫目ウズオビムシ科Peridinidaeに属する原生動物の総称(イラスト),または広く渦鞭毛虫類をいう。海,池,湖でプランクトン生活をする。形には円形,紡錘形,円錐形,いかり形などがあるが,体はセルロース性の2以上の多数の殻板で覆われている。殻板の表面には孔紋状の模様が見られる。また殻板には体を取り巻く横溝と短い縦溝があって,横溝の中には1本の横鞭毛が波状になって通り,縦鞭毛は後方へ垂れる。海産のものは発光性を有し,ときに異常発生して赤潮の原因になることがある。

出典 株式会社平凡社世界大百科事典 第2版について 情報

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