Common Eastern Ray Spider
Theridiosoma gemmosum (Koch, 1877)
Taxonomy
| Kingdom | Animalia |
|---|---|
| Phylum | Arthropoda |
| Subphylum | Chelicerata |
| Class | Arachnida |
| Order | Araneae |
| Family | Theridiosomatidae |
| Genus | Theridiosoma |
| Species | Theridiosoma gemmosum (Koch, 1877) |
Description
Diagnostic characters
- Ecological class
- Trogloxene
- Realm
- Terrestrial
Distribution
Range
Known from eight counties across four states.
Continent
North America
Country
United States
States and provinces
Alabama, Georgia, Illinois, Indiana
Counties
- Alabama
- Calhoun, Colbert, Jackson, Madison, Morgan
- Georgia
- Walker
- Illinois
- Monroe
- Indiana
- Monroe
Conservation and management
NatureServe
G5 Secure
National ranks
- Canada
- N4 Apparently Secure
- United States
- NNR
Subnational ranks
- New Brunswick
- SU Unrankable
- Ontario
- S4 Apparently Secure
- Prince Edward Island
- SU Unrankable
- Nova Scotia
- SU Unrankable
- Newfoundland and Labrador
- SU Unrankable
- Quebec
- SNR Unranked
- Indiana
- SNR Unranked
State and federal status
Not listed under the U.S. Endangered Species Act
References
- Archer, A.F. 1940. Some cave spiders of Alabama. Journal of the Alabama Academy of Science 12: 28.
- Archer, A.F. 1940. The Argiopidae or orb-weaving spiders of Alabama. Paper of the Alabama Museum of Natural History 14: 7–77.
- Banta, A.M. 1907. The fauna of Mayfield's Cave. Carnegie Institution of Washington Publication 67: 1–114. https://www.biodiversitylibrary.org/item/60987.
- Niemiller, M.L., Anderson, C.L., Maxwell, E.C., Midgette, H., Quering, C., Richards, M., Wilson, K. & Wirwa, N. 2025. A noteworthy range extension of the federally endangered Alabama Cave Shrimp (Palaemonias alabamae) south of the Tennessee River in northern Alabama. Southeastern Naturalist 24: N47-N58. doi:10.1656/058.024.0403
- Peck, S.B. 1988. A review of the cave fauna of Canada, and the composition and ecology of the invertebrate fauna of caves and mines in Ontario. Canadian Journal of Zoology 66: 1197–1213. doi:10.1139/z88-176
- Peck, S.B. 1989. The cave fauna of Alabama. Part I. The terrestrial invertebrates (excluding insects). National Speleological Society Bulletin 51: 11–33.
- Reeves, W.K., Jensen, J.B. & Ozier, J.C. 2000. New faunal and fungal records from caves in Georgia, USA. Journal of Cave and Karst Studies 62: 169–179. https://caves.org/wp-content/uploads/Publications/JCKS/v62/v62n3-Reeves.pdf.
- Webb, D.W., Taylor, S.J. & Krejca, J.K. 1993. The biological resources of Illinois caves and other subterranean environments. Illinois Natural History Survey, Champaign, Illinois, USA. 143 pp.
- Zigler, K.S., Niemiller, M.L., Stephen, C.D.R., Ayala, B.N., Milne, M.A., Gladstone, N.S., Engel, A.S., Jensen, J.B., Camp, C.D., Ozier, J.C. & Cressler, A. 2020. Biodiversity from caves and other subterranean habitats of Georgia, USA. Journal of Cave and Karst Studies 82: 125–167. doi:10.4311/2019LSC0125
How to cite this account
Theridiosoma gemmosum (Koch, 1877). Cave Biology Data Portal, account SP-3003. https://cavebiology.org/species/theridiosoma-gemmosum/ (accessed 7 September 2026).
Data sources and funding are listed in the Acknowledgments.
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