Functional morphology of the genitalia of Rhyacophila lezeyi Navas, 1933 (Trichoptera, Rhyacophilidae)
We collected seven fixed pairs of Rhyacophila lezeyi during mating copulation and observed four different states of copulation. We investigated the underlying mechanism for the variations in the morphology of each copulating device, based on the copulation state. Notably, the male anal sclerites und...
Saved in:
| Main Authors: | , , |
|---|---|
| Format: | Article |
| Language: | deu |
| Published: |
Senckenberg Gesellschaft für Naturforschung, Senckenberg Deutsches Entomologisches Institut
2023-11-01
|
| Series: | Contributions to Entomology |
| Online Access: | https://contributions-to-entomology.arphahub.com/article/109843/download/pdf/ |
| Tags: |
Add Tag
No Tags, Be the first to tag this record!
|
| _version_ | 1849685763091857408 |
|---|---|
| author | Ryoichi B. Kuranishi Ryo Sato Masashi Murakami |
| author_facet | Ryoichi B. Kuranishi Ryo Sato Masashi Murakami |
| author_sort | Ryoichi B. Kuranishi |
| collection | DOAJ |
| description | We collected seven fixed pairs of Rhyacophila lezeyi during mating copulation and observed four different states of copulation. We investigated the underlying mechanism for the variations in the morphology of each copulating device, based on the copulation state. Notably, the male anal sclerites underwent considerable changes from the early stages of copulation. Initially, the female segment VIII approached the male anal sclerites, which were pushed downwards by the female VIII and IX segments, extending from IX. With the progression of mating stage, the distended end of the female’s segment VIII covered the anal sclerites, pushing them further down. The male parameres were initially folded in bellows-like shapes under the aedeagus before copulation initiation. However, as the copulation stage advanced, they extended to about 3.2 times of their original length. Distended ends of both parameres adhered to the position of the spiracles at the anterior margin of the lateral part of the female’s VII abdominal sternite. The attachment site was the external surface of the hair bulb of the male parameres. During the middle stage of copulation, movements involving the opening and closing of the male gonopods started. The gonoslylus made strong contact with the female’s abdominal segment VIII, resulting in the deformation of segment VIII due to the contact pressure. |
| format | Article |
| id | doaj-art-bee6c4bc75cd4e3d8e005e432564ef2e |
| institution | DOAJ |
| issn | 2511-6428 |
| language | deu |
| publishDate | 2023-11-01 |
| publisher | Senckenberg Gesellschaft für Naturforschung, Senckenberg Deutsches Entomologisches Institut |
| record_format | Article |
| series | Contributions to Entomology |
| spelling | doaj-art-bee6c4bc75cd4e3d8e005e432564ef2e2025-08-20T03:22:59ZdeuSenckenberg Gesellschaft für Naturforschung, Senckenberg Deutsches Entomologisches InstitutContributions to Entomology2511-64282023-11-0173219519910.3897/contrib.entomol.73.e109843109843Functional morphology of the genitalia of Rhyacophila lezeyi Navas, 1933 (Trichoptera, Rhyacophilidae)Ryoichi B. Kuranishi0Ryo Sato1Masashi Murakami2Chiba UniversityChiba UniversityChiba UniversityWe collected seven fixed pairs of Rhyacophila lezeyi during mating copulation and observed four different states of copulation. We investigated the underlying mechanism for the variations in the morphology of each copulating device, based on the copulation state. Notably, the male anal sclerites underwent considerable changes from the early stages of copulation. Initially, the female segment VIII approached the male anal sclerites, which were pushed downwards by the female VIII and IX segments, extending from IX. With the progression of mating stage, the distended end of the female’s segment VIII covered the anal sclerites, pushing them further down. The male parameres were initially folded in bellows-like shapes under the aedeagus before copulation initiation. However, as the copulation stage advanced, they extended to about 3.2 times of their original length. Distended ends of both parameres adhered to the position of the spiracles at the anterior margin of the lateral part of the female’s VII abdominal sternite. The attachment site was the external surface of the hair bulb of the male parameres. During the middle stage of copulation, movements involving the opening and closing of the male gonopods started. The gonoslylus made strong contact with the female’s abdominal segment VIII, resulting in the deformation of segment VIII due to the contact pressure.https://contributions-to-entomology.arphahub.com/article/109843/download/pdf/ |
| spellingShingle | Ryoichi B. Kuranishi Ryo Sato Masashi Murakami Functional morphology of the genitalia of Rhyacophila lezeyi Navas, 1933 (Trichoptera, Rhyacophilidae) Contributions to Entomology |
| title | Functional morphology of the genitalia of Rhyacophila lezeyi Navas, 1933 (Trichoptera, Rhyacophilidae) |
| title_full | Functional morphology of the genitalia of Rhyacophila lezeyi Navas, 1933 (Trichoptera, Rhyacophilidae) |
| title_fullStr | Functional morphology of the genitalia of Rhyacophila lezeyi Navas, 1933 (Trichoptera, Rhyacophilidae) |
| title_full_unstemmed | Functional morphology of the genitalia of Rhyacophila lezeyi Navas, 1933 (Trichoptera, Rhyacophilidae) |
| title_short | Functional morphology of the genitalia of Rhyacophila lezeyi Navas, 1933 (Trichoptera, Rhyacophilidae) |
| title_sort | functional morphology of the genitalia of rhyacophila lezeyi navas 1933 trichoptera rhyacophilidae |
| url | https://contributions-to-entomology.arphahub.com/article/109843/download/pdf/ |
| work_keys_str_mv | AT ryoichibkuranishi functionalmorphologyofthegenitaliaofrhyacophilalezeyinavas1933trichopterarhyacophilidae AT ryosato functionalmorphologyofthegenitaliaofrhyacophilalezeyinavas1933trichopterarhyacophilidae AT masashimurakami functionalmorphologyofthegenitaliaofrhyacophilalezeyinavas1933trichopterarhyacophilidae |