… There are a huge number of species, ranging from marine, brackish, freshwater, and underground water species such as caves and wells to terrestrial species, with about 60 families and 4,700 known species. Well-known terrestrial species include the sandhopper and long-horned springtail. The freshwater species Rivulogammarus nipponensis (illustration) is 8-12 mm long and is commonly found under stones in lakes, rivers, and streams in Honshu and Kyushu, while the Annandale gammarus Anisogammarus annandalei is 8-16 mm long and is commonly found in lakes, rivers, and coastal brackish waters from Hokkaido to Kyushu. The Shikoku Mekura gammarus Pseudocrangonyx shikokunis is 7-9 mm long, colorless, and has intact eyes. … *Some of the terminology that refers to the "Annandale gammarid shrimp" is listed below. Source | Heibonsha World Encyclopedia 2nd Edition | Information |
… 海洋および汽水,淡水,洞穴や井戸などの地下水生のものから陸生のものまで,非常に多数の種類があり,約60科,4700種ほどが知られている。陸産としては,ハマトビムシ,ヒゲナガトビムシなどがよく知られ,淡水産のニホンヨコエビRivulogammarus nipponensis(イラスト)は体長8~12mm,本州および九州の湖沼,河川,渓流などの石の下に,アンナンデールヨコエビAnisogammarus annandaleiは体長8~16mm,北海道から九州までの湖沼,河川および沿岸の汽水域にふつうに見られる。シコクメクラヨコエビPseudocrangonyx shikokunisは体長7~9mm,無色で眼は退化してない。… ※「アンナンデールヨコエビ」について言及している用語解説の一部を掲載しています。 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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