Larval organ
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An organ that appears only in the larval stage of an animal and disappears after metamorphosis. In the case of insects, it is called a larval organ. Examples include the tail and gills of a tadpole, the tail of a sea squirt larva, the ciliated ring and protonephric duct of the annelid Trochophora, and the abdominal legs and tracheal gills of insect larvae. Source: Encyclopaedia Britannica Concise Encyclopedia About Encyclopaedia Britannica Concise Encyclopedia Information |
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動物の幼生期にのみ現れ，変態後消滅する器官。昆虫の場合は幼虫器官という。例として，おたまじゃくしの尾・鰓，ホヤの幼生の尾，環形動物のトロコフォラの繊毛環・原腎管，昆虫の幼生の腹脚・気管鰓などがあげられる。
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