Arachnids of North Carolina
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View Cybaeidae Members: NC Records

Cybaeus giganteus - No Common Name

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Taxonomy
Order: ARANEAEInfraorder: AraneomorphaeFamily: Cybaeidae                                                                                 
Identification
Online Description/Photos: BugGuide Google, iNaturalist, Wikipedia, GBIF
Comments: separating C. silicis from C. giganteus is primarily a value judgement based primarily on size and somewhat on leg banding: carapace length in C. giganteus females ranges from 4.5 to 5.4 mm (a relatively large spider), in C. silicis females the carapace length range is 3.4 to 4.0 mm (not really a lot different from C. giganteus!). Additionally, C. silicis legs are usually at least faintly banded while those of C. giganteus usually show no evidence of banding. The BEST way to get positive ID of your Cybaeus is to try to find mature males -- these are usually only found later in the summer and through the fall until the weather turns (you can usually find females year-round). Males are much easier to identify than are females and males of the 3 eastern NA species are quite easy to tell apart, even from digital images as long as you have a clear shot of the male pedipalp. You can usually ID a mature male using a good hand lens although using a dissecting microscope is the best way.
Distribution in North Carolina
Comments:
County Map: Clicking on a county returns the records for the species in that county.
Cybaeus giganteus
Adult phenology:
 High Mountains (HM) ≥ 4,000 ft.
 Low Mountains (LM) < 4,000 ft.
 Piedmont (Pd)
 Coastal Plain (CP)

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Habitats and Life History
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Status in North Carolina
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