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Structure and evolution of the stigmapophysis-A unique repose wing-coupling structure in Psocodea
Naoki Ogawa1, Kazunori Yoshizawa1
1Systematic Entomology, School of Agriculture, Hokkaido University, Sapporo, 060-8589, Japan.
Arthropod Structure & Development
|June 23, 2018
Summary
Bark lice (Psocodea) evolved unique wing-coupling systems twice independently. These insect wing-fixing structures, studied via SEM, differ morphologically and phylogenetically across suborders.
Area of Science:
- Entomology
- Evolutionary Biology
- Morphology
Background:
- Foldable wings are crucial for insect diversity and protection.
- Wing-fixing systems enhance wing function and durability.
- Bark lice (Psocodea) exhibit a unique wing-to-wing repose coupling system.
Purpose of the Study:
- To conduct a detailed morphological and evolutionary study of the bark louse repose coupling system.
- To investigate the independent evolution of wing-coupling structures in Psocodea.
- To utilize SEM to analyze the repose coupling apparatus in diverse bark louse species.
Main Methods:
- Scanning Electron Microscopy (SEM) was employed.
- 32 species of bark lice, representing all three suborders (Trogiomorpha, Troctomorpha, Psocomorpha), were examined.
- Morphological analysis of the repose coupling structures was performed.
Main Results:
- The repose wing-coupling apparatus evolved independently twice within Psocodea.
- In Trogiomorpha, the apparatus is on the subcostal vein, featuring rib-like structures.
- In Troctomorpha and Psocomorpha, the apparatus is on the radius vein, characterized by a swollen vein.
Conclusions:
- The morphological and developmental differences in repose coupling structures provide phylogenetic insights.
- Independent evolution of wing-coupling mechanisms highlights adaptive radiation in bark lice.
- This study clarifies the evolution and systematic significance of wing-fixing systems in Psocodea.
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