Prosobranchia

Japanese: Prosobranchia
Prosobranchia

...they are further divided into three subclasses: (a) Prosobranchia: Common snail shells belong to this subclass. Most of them have a rolled shell and a flap behind the foot that closes the opening of the shell when the soft body is contracted into the shell.

From [Gastropods]

… Gastropods are further divided into three subclasses: (1) Prosobranchia: This is the most basic class, with a rolled shell and gills in the mantle cavity (primitive classes only have one pair). They are called prosobranchia because they are located in front of the heart.

*Some of the terminology explanations that mention "Prosobranchia" are listed below.

Source | Heibonsha World Encyclopedia 2nd Edition | Information

Japanese:

…さらに次の3亜綱に区分される。(a)前鰓(ぜんさい)亜綱Prosobranchia ふつうの巻貝がこれに属する。多くは巻いた殻をもち,足の後背にふたがあって軟体を殻に収縮したときそれで殻口をふさぐ。…

【腹足類】より

… 腹足類はさらに次の3亜綱に分けられる。(1)前鰓類(ぜんさいるい)Prosobranchia もっとも基本的な体制の類で,多くは巻いた殻をもち,外套腔にえらをもつ(原始的な類は1対)。これが心臓より前方にある特徴から前鰓類という。…

※「Prosobranchia」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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