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Hokkaido University Collection of Scholarly and Academic Papers >
Graduate School of Agriculture / Faculty of Agriculture >
Peer-reviewed Journal Articles, etc >
A biological switching valve evolved in the female of a sex-role reversed cave insect to receive multiple seminal packages
This item is licensed under:Creative Commons Attribution 4.0 International
| Title: | A biological switching valve evolved in the female of a sex-role reversed cave insect to receive multiple seminal packages |
| Authors: | Yoshizawa, Kazunori Browse this author →KAKEN DB | | Kamimura, Yoshitaka Browse this author | | Lienhard, Charles Browse this author | | Ferreira, Rodrigo L. Browse this author | | Blanke, Alexander Browse this author |
| Issue Date: | 16-Oct-2018 |
| Publisher: | eLife Sciences Publications |
| Journal Title: | Elife |
| Volume: | 7 |
| Start Page: | e39563 |
| Publisher DOI: | 10.7554/eLife.39563 |
| Abstract: | 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. | | https://creativecommons.org/licenses/by/4.0/ |
| Type: | article |
| URI: | http://hdl.handle.net/2115/72090 |
| Appears in Collections: | 農学院・農学研究院 (Graduate School of Agriculture / Faculty of Agriculture) > 雑誌発表論文等 (Peer-reviewed Journal Articles, etc)
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Submitter: 吉澤 和徳
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