Thorea okadai Yamada

Japanese: チスジノリ(血条苔) - チスジノリ（英語表記）Thorea okadai Yamada

This freshwater red alga grows in rivers along the Kirishima volcanic system in central and southern Kyushu, and because of its unique distribution, its habitats in the Kikuchi River in Kumamoto Prefecture and the Sendai River in Kagoshima Prefecture have been designated as natural monuments. The body is thread-like, dark purple, and has many branches, reaching lengths of 10 to 45 cm. It is soft and sticky, and when young, its entire surface is covered with dense, hair-like assimilated threads 10 to 30 μm long. It belongs to the order Alcalares, order Ceruleaceae, class Rhodophyceae, and a similar species is T. gaudichaudii C.Ag., which grows in Okinawa and the Mariana Islands.

Source: Heibonsha World Encyclopedia, 2nd Edition Information

Japanese:

九州中南部の霧島火山系に沿う河川に生育する淡水産の紅藻で，分布が特徴的であることから，熊本県菊池川と鹿児島県川内川の生育地が天然記念物に指定されている。体は糸状，暗紫色で多くの枝を出し，長さ10～45cmになる。粘質で柔らかく，幼時は全面に長さ10～30μmの毛状の同化糸を密生する。紅藻綱ウミゾウメン目ベニモズク科に所属し，似た種類に沖縄やマリアナ群島に生育するシマチスジノリT.gaudichaudii C.Ag.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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