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A biological switching valve evolved in the female of a sex-role reversed cave insect to receive multiple seminal packages

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タイトル: A biological switching valve evolved in the female of a sex-role reversed cave insect to receive multiple seminal packages
著者: Yoshizawa, Kazunori 著作を一覧する
Kamimura, Yoshitaka 著作を一覧する
Lienhard, Charles 著作を一覧する
Ferreira, Rodrigo L. 著作を一覧する
Blanke, Alexander 著作を一覧する
発行日: 2018年10月16日
出版者: eLife Sciences Publications
誌名: Elife
巻: 7
開始ページ: e39563
出版社 DOI: 10.7554/eLife.39563
抄録: We report a functional switching valve within the female genitalia of the Brazilian cave insect Neotrogla. The valve complex is composed of two plate-like sclerites, a closure element, and in-and-outflow canals. Females have a penis-like intromittent organ to coercively anchor males and obtain voluminous semen. The semen is packed in a capsule, whose formation is initiated by seminal injection. It is not only used for fertilization but also consumed by the female as nutrition. The valve complex has two slots for insemination so that Neotrogla can continue mating while the first slot is occupied. In conjunction with the female penis, this switching valve is a morphological novelty enabling females to compete for seminal gifts in their nutrient-poor cave habitats through long copulation times and multiple seminal injections. The evolution of this switching valve may have been a prerequisite for the reversal of the intromittent organ in Neotrogla.
Rights: Copyright Yoshizawa et al. This article is distributed under the terms of the Creative Commons Attribution License, which permits unrestricted use and redistribution provided that the original author and source are credited.
資料タイプ: article
URI: http://hdl.handle.net/2115/72090
出現コレクション:雑誌発表論文等 (Peer-reviewed Journal Articles, etc)

提供者: 吉澤 和徳

 

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