Spiders of North Carolina

Order:
Scientific Name: Common Name:		Family (Alpha):

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: ARANEAE	Infraorder: Mygalomorphae	Family: 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, GBIF	Technical 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 mm	Adult 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:

Antrodiaetus microunicolor - a foldingdoor spider

Photo Gallery for Antrodiaetus microunicolor - a foldingdoor spider

Photo Gallery for Antrodiaetus microunicolor - a foldingdoor spider
	Recorded by: Brian Bockhahn Buncombe Co. Comment:	Recorded by: K. Bischof Transylvania Co. Comment: GORG - Obs. white pine bath rooms.
	Recorded by: Brian Bockhahn Buncombe Co. Comment:	Recorded by: Brian Bockhahn Henderson Co. Comment:
	Recorded by: Brian Bockhahn McDowell Co. Comment: 4 occupied burrows	Recorded by: Brian Bockhahn Buncombe Co. Comment: 4 occupied burrows
	Recorded by: Brian Bockhahn Transylvania Co. Comment:	Recorded by: Brian Bockhahn Buncombe Co. Comment: 57 occupied burrows
	Recorded by: Brian Bockhahn Buncombe Co. Comment: 57 occupied burrows	Recorded by: Brian Bockhahn Surry Co. Comment: 10 occupied burrows, (3) 4mm, (2) 5mm, (2) 6mm, (2) 7mm, (1) 8mm. Amidst rock outcrops along rail line cut.
	Recorded by: Brian Bockhahn Surry Co. Comment: 10 occupied burrows, (3) 4mm, (2) 5mm, (2) 6mm, (2) 7mm, (1) 8mm. Amidst rock outcrops along rail line cut.	Recorded by: Brian Bockhahn Surry Co. Comment: 10 occupied burrows, (3) 4mm, (2) 5mm, (2) 6mm, (2) 7mm, (1) 8mm. Amidst rock outcrops along rail line cut.
	Recorded by: Brian Bockhahn Haywood Co. Comment: Rosemount Road, below "the orchards overlook". 8 occupied burrows 3,4,4,5,5,6,6,6 mm. 37 degrees. Elevation 3822'.	Recorded by: Brian Bockhahn Haywood Co. Comment: Greenspire Road, below "the orchards overlook". 4 occupied burrows in dry embankment. 3,3,6,8 mm. 37 degrees. Elevation 3822'
	Recorded by: Brian Bockhahn Jackson Co. Comment: Balanced Rock overlook. 18 occupied burrows (3) 3mm, (5) 4mm, (6) 6mm, (3) 7mm, (1) 11mm.	Recorded by: Brian Bockhahn Clay Co. Comment: 6 occupied burrows, (4) 4mm, (1) 5mm, (1) 6mm. Not present near rock faces. None found along creek.
	Recorded by: Brian Bockhahn Jackson Co. Comment: 2 occupied burrows, disturbed embankment along feeder creek.	Recorded by: Brian Bockhahn Cherokee Co. Comment: 43 occupied burrows. (2) 2mm, (8) 3mm, (9) 4mm, (5) 5mm, (8) 6mm, (8) 7mm, (3) 8mm. Elevation 1,863', temperature 47. Piney Knob Trailhead access road, Town of Murphy owned, conservation easement held by the state of NC and monitored by Mainspring Conservation Trust.
	Recorded by: Brian Bockhahn Cherokee Co. Comment: 43 occupied burrows. (2) 2mm, (8) 3mm, (9) 4mm, (5) 5mm, (8) 6mm, (8) 7mm, (3) 8mm. Elevation 1,863', temperature 47. Piney Knob Trailhead access road, Town of Murphy owned, conservation easement held by the state of NC and monitored by Mainspring Conservation Trust.	Recorded by: Brian Bockhahn Cherokee Co. Comment: 43 occupied burrows. (2) 2mm, (8) 3mm, (9) 4mm, (5) 5mm, (8) 6mm, (8) 7mm, (3) 8mm. Elevation 1,863', temperature 47. Piney Knob Trailhead access road, Town of Murphy owned, conservation easement held by the state of NC and monitored by Mainspring Conservation Trust.
	Recorded by: Brian Bockhahn Cherokee Co. Comment: 43 occupied burrows. (2) 2mm, (8) 3mm, (9) 4mm, (5) 5mm, (8) 6mm, (8) 7mm, (3) 8mm. Elevation 1,863', temperature 47. Piney Knob Trailhead access road, Town of Murphy owned, conservation easement held by the state of NC and monitored by Mainspring Conservation Trust.	Recorded by: Brian Bockhahn Cherokee Co. Comment: 43 occupied burrows. (2) 2mm, (8) 3mm, (9) 4mm, (5) 5mm, (8) 6mm, (8) 7mm, (3) 8mm. Elevation 1,863', temperature 47. Piney Knob Trailhead access road, Town of Murphy owned, conservation easement held by the state of NC and monitored by Mainspring Conservation Trust.
	Recorded by: Brian Bockhahn, J. Thomson Macon Co. Comment: 256 occupied burrows.	Recorded by: Brian Bockhahn, J. Thomson Macon Co. Comment: 256 occupied burrows.
	Recorded by: Brian Bockhahn, J. Thomson Macon Co. Comment: 66 occupied burrows	Recorded by: Brian Bockhahn, J. Thomson Macon Co. Comment: 66 occupied burrows
	Recorded by: Brian Bockhahn, J. Thomson Macon Co. Comment: 66 occupied burrows	Recorded by: Brian Bockhahn, J. Thomson Macon Co. Comment: 118 occupied burrows. (3) 1mm, (11) 2mm, (13) 3mm, (25) 4mm, (16) 5mm, (16) 6mm, (17) 7mm, (1) 8mm, (4) 9mm, (5) 10mm, (5) 11mm, (2) 12mm.
	Recorded by: Brian Bockhahn, J. Thomson Macon Co. Comment: 17 occupied burrows, (5) 4mm or less, (7) 5-7mm, (3) 7mm, (1) 8mm, (1) 10mm	Recorded by: Brian Bockhahn, J. Thomson Macon Co. Comment: Big Laurel Falls, at least 3 active burrows in mossy banks
	Recorded by: Brian Bockhahn, J. Thomson Buncombe Co. Comment: 8 active burrows	Recorded by: Brian Bockhahn, J. Thomson Buncombe Co. Comment:
	Recorded by: Brian Bockhahn Caswell Co. Comment:	Recorded by: Brian Bockhahn Caswell Co. Comment:
	Recorded by: Brian Bockhahn Macon Co. Comment: Moss embankment, 4-6' off the ground, west facing slope. Turret size 2-20mm. 4 occupied burrows in 3-6 mm range (male and immature); 1 occupied burrows in 6-10 mm range (likely females).	Recorded by: Brian Bockhahn Macon Co. Comment: Moss and soil embankment, 4-6' off the ground, south facing slope. Turret size 2-20mm. 7 occupied burrows in 3-6 mm range (male and immature); 11 occupied burrows in 6-10 mm range (likely females); 1 occupied burrow in 10-12 mm range (female)
	Recorded by: Brian Bockhahn Macon Co. Comment: Moss and soil embankment, 4-6' off the ground, south facing slope. Turret size 2-20mm. 7 occupied burrows in 3-6 mm range (male and immature); 11 occupied burrows in 6-10 mm range (likely females); 1 occupied burrow in 10-12 mm range (female)	Recorded by: Brian Bockhahn Macon Co. Comment: Moss and soil embankment, 4-6' off the ground, south facing slope. Turret size 2-20mm. 7 occupied burrows in 3-6 mm range (male and immature); 11 occupied burrows in 6-10 mm range (likely females); 1 occupied burrow in 10-12 mm range (female)
	Recorded by: Brian Bockhahn Macon Co. Comment: Moss and soil embankment, 4-6' off the ground, south facing slope. Turret size 2-20mm. 7 occupied burrows in 3-6 mm range (male and immature); 11 occupied burrows in 6-10 mm range (likely females); 1 occupied burrow in 10-12 mm range (female)	Recorded by: Brian Bockhahn Macon Co. Comment: Moss and soil embankment, 4-6' off the ground, south facing slope. Turret size 2-20mm. 7 occupied burrows in 3-6 mm range (male and immature); 11 occupied burrows in 6-10 mm range (likely females); 1 occupied burrow in 10-12 mm range (female)
	Recorded by: Brian Bockhahn Macon Co. Comment: Moss and soil embankment, 4-6' off the ground, south facing slope. Turret size 2-20mm. 7 occupied burrows in 3-6 mm range (male and immature); 11 occupied burrows in 6-10 mm range (likely females); 1 occupied burrow in 10-12 mm range (female)	Recorded by: Brian Bockhahn Macon Co. Comment: Moss and soil embankment, 4-6' off the ground, NNW facing slope. Turret size 2-20mm. 59 occupied burrows in 3-6 mm range (male and immature); 33 occupied burrows in 6-10 mm range (likely females); 9 occupied burrows in 10-12 mm range (female)
	Recorded by: Brian Bockhahn Macon Co. Comment: Moss and soil embankment, 4-6' off the ground, NNW facing slope. Turret size 2-20mm. 59 occupied burrows in 3-6 mm range (male and immature); 33 occupied burrows in 6-10 mm range (likely females); 9 occupied burrows in 10-12 mm range (female)	Recorded by: Brian Bockhahn Macon Co. Comment: Moss and soil embankment, 4-6' off the ground, NNW facing slope. Turret size 2-20mm. 59 occupied burrows in 3-6 mm range (male and immature); 33 occupied burrows in 6-10 mm range (likely females); 9 occupied burrows in 10-12 mm range (female)
	Recorded by: Brian Bockhahn Macon Co. Comment: Moss and soil embankment, 4-6' off the ground, NNW facing slope. Turret size 2-20mm. 59 occupied burrows in 3-6 mm range (male and immature); 33 occupied burrows in 6-10 mm range (likely females); 9 occupied burrows in 10-12 mm range (female)	Recorded by: Brian Bockhahn Macon Co. Comment: Moss and soil embankment, 4-6' off the ground, NNW facing slope. Turret size 2-20mm. 59 occupied burrows in 3-6 mm range (male and immature); 33 occupied burrows in 6-10 mm range (likely females); 9 occupied burrows in 10-12 mm range (female)
	Recorded by: Brian Bockhahn Macon Co. Comment: Moss and soil embankment, 4-6' off the ground, NNW facing slope. Turret size 2-20mm. 59 occupied burrows in 3-6 mm range (male and immature); 33 occupied burrows in 6-10 mm range (likely females); 9 occupied burrows in 10-12 mm range (female)	Recorded by: Brian Bockhahn Macon Co. Comment: Moss and soil embankment, 4-6' off the ground, NNW facing slope. Turret size 2-20mm. 59 occupied burrows in 3-6 mm range (male and immature); 33 occupied burrows in 6-10 mm range (likely females); 9 occupied burrows in 10-12 mm range (female)
	Recorded by: Brian Bockhahn Macon Co. Comment: Moss and soil embankment, 4-6' off the ground, NNW facing slope. Turret size 2-20mm. 59 occupied burrows in 3-6 mm range (male and immature); 33 occupied burrows in 6-10 mm range (likely females); 9 occupied burrows in 10-12 mm range (female)