Biology:Cyclosa omonaga
| Cyclosa omonaga | |
|---|---|
| |
| female from Japan | |
| |
| male from Hong Kong | |
Scientific classification 
| |
| Kingdom: | Animalia |
| Phylum: | Arthropoda |
| Subphylum: | Chelicerata |
| Class: | Arachnida |
| Order: | Araneae |
| Infraorder: | Araneomorphae |
| Family: | Araneidae |
| Genus: | Cyclosa |
| Species: | C. omonaga
|
| Binomial name | |
| Cyclosa omonaga Tanikawa, 1992
| |
Cyclosa omonaga is a species of orb-weaver spider in the family Araneidae. The species name "omonaga" (おもなが) comes from the Japanese word meaning "long-faced", referring to the shape of the carapace.[1]
Taxonomy
The species was first described by Akio Tanikawa in 1992 based on specimens collected from various locations across Japan.[1] Prior to its formal description, specimens of this species had been misidentified as other Cyclosa species, including C. insulana, C. japonica, and others in various publications.[1]
Distribution
C. omonaga has been recorded from China, Korea, Taiwan, and Japan.[2] In Japan, the species has been found in multiple prefectures including Okayama, Mie, Wakayama, Nara, Shimane, Kagawa, Ehime, Fukuoka, Kumamoto, and Miyazaki.[1]
Description
Cyclosa omonaga is a medium-sized orb weaver with females measuring 4.65-8.30 mm in body length and males 3.76-4.75 mm.[1] The carapace is pale brown and marginated with dark brown, often featuring a dark brown median line. The abdomen displays variable coloration patterns, typically silvery pale brown mottled with dark brown and silver, often with distinctive X-shaped or A-shaped silver markings.[1]
Females possess three prominent protuberances at the posterior end of the abdomen, which distinguishes them from closely related species such as C. albisternis, which has additional paired dorsal tubercles.[1] Males can be distinguished by the distinctive shape of the median apophysis and conductor of the palp.[1]
References
- ↑ 1.0 1.1 1.2 1.3 1.4 1.5 1.6 1.7 Tanikawa, A. (1992). "A revisional study of the Japanese spiders of the genus Cyclosa (Araneae: Araneidae)". Acta Arachnologica 41 (1): 30–32. doi:10.2476/asjaa.41.11.
- ↑ "Cyclosa omonaga Tanikawa, 1992". World Spider Catalog. https://wsc.nmbe.ch/species/3643. Retrieved 28 August 2025.
Wikidata ☰ Q2253729 entry
 |  |
