Coleosoma octomaculatum
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| Coleosoma octomaculatum | |
|---|---|
 | |
| female from 1906 description | |
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| male from New Zealand | |
Scientific classification  | |
| Kingdom: | Animalia |
| Phylum: | Arthropoda |
| Subphylum: | Chelicerata |
| Class: | Arachnida |
| Order: | Araneae |
| Infraorder: | Araneomorphae |
| Family: | Theridiidae |
| Genus: | Coleosoma |
| Species: | C. octomaculatum |
| Binomial name | |
| Coleosoma octomaculatum | |
| Synonyms | |
| |
Coleosoma octomaculatum is a species of spider in the family Theridiidae. It is native to East Asia and has been introduced to New Zealand.[1]
The species name octomaculatum is derived from Latin octo (eight) and maculatum (spotted), referring to the eight spots visible on the female's opisthosoma.[2]
Taxonomy
The species was originally described by Wilhelm Bösenberg and Embrik Strand in 1906 as Theridion octomaculatum.[3] It was later transferred to the genus Coleosoma by Yoshida in 1982,[4] then to Chrysso by the same author in 2009,[5] before being returned to Coleosoma by Sirvid and Fitzgerald in 2016. The transfer back to Coleosoma was based on the presence of a sheathed anteroventral portion of the male opisthosoma and similarity of male palp morphology.[6]
Sirvid and Fitzgerald suggest that C. octomaculatum belongs to a "floridanum group" within Coleosoma, characterized by a more strongly sclerotized epigyne with distinct vulva, short copulatory ducts, large spermathecae, and an embolus spiral forming a half circle, in contrast to the "blandum group" which has weakly sclerotized epigynes and embolus spirals forming almost complete circles.[6]
Distribution
C. octomaculatum is native to China, Korea, Taiwan, and Japan.[1] It was first recorded from New Zealand in 2016, where numerous specimens collected between 1996 and 2007 suggest it has become established as an introduced species.[6] The species is also recorded from the Philippines.[7]