Arachnids of North Carolina
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Scientific Name: Common Name: Family (Alpha):
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View Antrodiaetidae Members: NC Records

Antrodiaetus microunicolor - a foldingdoor spider


Female in burrow entrance
Female ventral
Females in burrow entrance
Female dorsal
Defensive posture
Taxonomy
Order: ARANEAEInfraorder: MygalomorphaeFamily: Antrodiaetidae                                                                                 
Comments: Greek antrodiaitos - "living in caves", from antron - "cave" + diaita - "way of life, dwelling"
Species Comment: Smaller and occur later in fall than A. unicolor
Identification
Online Description/Photos: BugGuide Google, iNaturalist, Wikipedia, GBIFTechnical Description: https://www.mapress.com/zootaxa/2005f/zt00872.pdf
Comments: Male and female are both smaller than A. unicolor and occur later in fall. Female has lighter coloration: dorsal shield of prosoma, legs, and tergite usually yellowish-brown (A. unicolor dark chocolate brown); and convergent median dorsal setae just posterior to pedicel thin, sometimes somewhat thickened, and tapered. Male the absence of macrosetae on the ventral, distal surface of metatarsus I (A. unicolor has at least one macroseta usually present)
Total Length: Female carapace length less than 7mm, male carapace length less than 4.5 mmAdult ID: identifiable by photo of specific features and/or supplementary info
Distribution in North Carolina
Comments: Southwestern North Carolina and eastern Tennessee
County Map: Clicking on a county returns the records for the species in that county.
Adult phenology:
 High Mountains (HM) ≥ 4,000 ft.
 Low Mountains (LM) < 4,000 ft.
 Piedmont (Pd)
 Coastal Plain (CP)

Click on graph to enlarge
Habitats and Life History
Habitats: Temperate forest
Observation Methods: Careful visual observation of burrows during day time, head lamps can locate them near burrow entrance at night. Pitfall traps.
Abundance/Frequency: Uncommon, adults breed in late October through December
Silk / Web: Burrow
Behavior: These spiders build cryptic, silk-lined subterranean burrows that are concealed by a collapsible turret or collar during daylight hours. After dusk, spiders prop open the collar and wait at the burrow entrance to seize passing insects and other prey items.
Status in North Carolina
Natural Heritage Program Status:
Natural Heritage Program Ranks:
State Protection:
Comments:

 Photo Gallery for Antrodiaetus microunicolor - a foldingdoor spider

57 photos are available. Only the most recent 30 are shown.

Recorded by: K. Bischof on 2023-10-21
Transylvania Co.
Comment: 		Recorded by: Brian Bockhahn on 2023-08-01
Buncombe Co.
Comment:
Recorded by: Brian Bockhahn on 2023-06-17
Avery Co.
Comment: 		Recorded by: Brian Bockhahn on 2023-06-17
Avery Co.
Comment:
Recorded by: Brian Bockhahn on 2023-06-17
Avery Co.
Comment: 		Recorded by: Brian Bockhahn on 2023-06-17
Avery Co.
Comment:
Recorded by: Brian Bockhahn on 2023-06-17
Avery Co.
Comment: 		Recorded by: Brian Bockhahn on 2023-06-17
Avery Co.
Comment:
Recorded by: K. Bischof on 2022-10-26
Transylvania Co.
Comment: 		Recorded by: Brian Bockhahn on 2022-09-15
Buncombe Co.
Comment:
Recorded by: Brian Bockhahn on 2022-05-09
Buncombe Co.
Comment: 		Recorded by: Brian Bockhahn on 2022-03-06
McDowell Co.
Comment:
Recorded by: Brian Bockhahn on 2022-03-05
Henderson Co.
Comment: 		Recorded by: Brian Bockhahn on 2022-03-01
Buncombe Co.
Comment:
Recorded by: Brian Bockhahn on 2022-02-11
Buncombe Co.
Comment: 		Recorded by: Brian Bockhahn on 2022-02-11
Buncombe Co.
Comment:
Recorded by: Brian Bockhahn on 2022-01-14
Transylvania Co.
Comment: 		Recorded by: Brian Bockhahn on 2021-12-14
Surry Co.
Comment:
Recorded by: Brian Bockhahn on 2021-12-14
Surry Co.
Comment: 		Recorded by: Brian Bockhahn on 2021-12-14
Surry Co.
Comment:
Recorded by: Brian Bockhahn, J. Thomson on 2021-12-09
Buncombe Co.
Comment: 		Recorded by: Brian Bockhahn on 2021-12-08
Cherokee Co.
Comment:
Recorded by: Brian Bockhahn on 2021-12-08
Cherokee Co.
Comment: 		Recorded by: Brian Bockhahn on 2021-12-08
Cherokee Co.
Comment:
Recorded by: Brian Bockhahn on 2021-12-08
Cherokee Co.
Comment: 		Recorded by: Brian Bockhahn on 2021-12-08
Cherokee Co.
Comment:
Recorded by: Brian Bockhahn on 2021-12-08
Clay Co.
Comment: 		Recorded by: Brian Bockhahn on 2021-12-08
Haywood Co.
Comment:
Recorded by: Brian Bockhahn on 2021-12-08
Haywood Co.
Comment: 		Recorded by: Brian Bockhahn on 2021-12-08
Jackson Co.
Comment: