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Hokkaido University Collection of Scholarly and Academic Papers >
Graduate School of Agriculture / Faculty of Agriculture >
Peer-reviewed Journal Articles, etc >
Acquisition of novel muscles enabled protruding and retracting mechanisms of female penis in sex-role reversed cave insects
| Title: | Acquisition of novel muscles enabled protruding and retracting mechanisms of female penis in sex-role reversed cave insects |
| Authors: | Cheng, Zixin Browse this author | | Kamimura, Yoshitaka Browse this author | | Ferreira, Rodrigo L. Browse this author | | Lienhard, Charles Browse this author | | Yoshizawa, Kazunori Browse this author →KAKEN DB |
| Keywords: | female genitalia | | gynosome | | homology | | Neotrogla | | muscle |
| Issue Date: | 2023 |
| Publisher: | Royal Society |
| Journal Title: | Royal Society open science |
| Volume: | 10 |
| Issue: | 1 |
| Start Page: | 220471 |
| Publisher DOI: | 10.1098/rsos.220471 |
| Abstract: | Brazilian sex-role reversed cave insects (genus Neotrogla) have a striking structure called the gynosome (or female penis), which deeply penetrates male vagina-like genitalia during copulation to receive nutritious semen. However, the protruding and retracting mechanisms of the female penis, including their evolutionary origin, are poorly understood. By using micro-computed tomography (mu CT), we compared the genital morphology and musculature between species with a gynosome and others lacking this structure. As a result, we discovered two groups of muscles related to the protrusion and retraction of gynosomes. These muscles were also observed in species with non-protrusible prepenis. This suggests that evolution of these muscles preceded the acquisition of the protruding function of the gynosome, originally having a putative stimulatory function to receive nutritious semen. This intermediate stage probably allowed for the reversal of genital functions. |
| Type: | article |
| URI: | http://hdl.handle.net/2115/88192 |
| 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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