Arachnids of North Carolina
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Common Spiders of NC
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Comments
Order:
Araneae - Spiders
Opiliones - Harvestmen
Pseudoscorpiones - Pseudoscorpions
Scorpiones - Scorpions
Scientific Name:
Common Name:
Family (Alpha):
ACROPSOPILIONIDAE-
AGELENIDAE-Funnel Weavers
AMAUROBIIDAE-Hacklemesh Weavers
ANTRODIAETIDAE-Folding Trapdoor Spiders
ANYPHAENIDAE-Ghost Spiders
ARANEIDAE-Orb Weavers
ATYPIDAE-Purseweb Spiders
BUTHIDAE-
CADDIDAE-
CHEIRACANTHIIDAE-
CHEIRIDIIDAE-
CHELIFERIDAE-
CHERNETIDAE-
CHTHONIIDAE-
CICURINIDAE-
CLUBIONIDAE-Sac Spiders
CORINNIDAE-Antmimics and Ground Sac Spiders
COSMETIDAE-Armoured harvestmen
CTENIDAE-Wandering Spiders
CYBAEIDAE-
DEINOPIDAE-Ogrefaced spider
DESIDAE-
DICTYNIDAE-Mesh Web Weavers
DYSDERIDAE-
EUCTENIZIDAE-Wafer-lid Trapdoor Spiders
FILISTATIDAE-
GARYPINIDAE-
GNAPHOSIDAE-Ground Spiders
HAHNIIDAE-
HALONOPROCTIDAE-
HYPOCHILIDAE-
LARCIDAE-
LEPTONETIDAE-
LINYPHIIDAE-Sheetweb and Dwarf Spiders
LIOCRANIDAE-Liocranid Sac Spiders
LYCOSIDAE-Wolf Spiders
MICROHEXURIDAE-
MIMETIDAE-Pirate spiders
MYSMENIDAE-
NEOBISIIDAE-
NEPHILIDAE-
NESTICIDAE-Scaffold Web Spiders
OECOBIIDAE-Wall spiders
OONOPIDAE-
OXYOPIDAE-Lynx Spiders
PHALANGIIDAE-
PHALANGODIDAE-Armoured harvestmen
PHILODROMIDAE-Running Crab Spiders
PHOLCIDAE-
PHONOGNATHIDAE-
PHRUROLITHIDAE-
PISAURIDAE-Nursery Web Spiders
SABACONIDAE-
SALTICIDAE-Jumping Spiders
SCLEROSOMATIDAE-
SCYTODIDAE-
SEGESTRIIDAE-
SICARIIDAE-
SPARASSIDAE-Giant Crab Spiders
STERNOPHORIDAE-
TARACIDAE-
TETRAGNATHIDAE-Long-jawed Orb Weavers
THERIDIIDAE-Cobweb Spiders
THERIDIOSOMATIDAE-Ray Spiders
THOMISIDAE-Crab Spiders
TITANOECIDAE-
TRACHELIDAE-
TRIAENONYCHIDAE-Armoured harvestmen
TRIDENCHTHONIIDAE-
ULOBORIDAE-Cribellate Orb Weavers
VAEJOVIDAE-
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Antrodiaetidae Members:
Antrodiaetus microunicolor
Antrodiaetus unicolor
NC
Records
Antrodiaetus unicolor
- a foldingdoor spider
Male dorsal
Male ventral
Female ventral
Taxonomy
Order:
ARANEAE
Infraorder:
Mygalomorphae
Family:
Antrodiaetidae
Comments:
Greek antrodiaitos - "living in caves", from antron - "cave" + diaita - "way of life, dwelling"
Species Comment:
Larger and males wander to mate earlier in fall than A. microunicolor
Identification
Online Description/Photos:
BugGuide
Google
,
iNaturalist
,
Wikipedia
,
GBIF
Technical Description:
https://www.mapress.com/zootaxa/2005f/zt00872.; https://www.biodiversitylibrary.org/page/4753451#page/338/mode/1up. Coyle, F.A. (1971) Systematics and natural history of the mygalomorph spider genus Antrodiaetus and related genera (Araneae: Antrodiaetidae). Bulletin of the Museum of Comparative Zoology, 141, 269–402.
Comments:
A dark chocolate brown coloration, the female has one dark abdominal tergite near the front. The female has robust chelicerae with a rastellum. The abdomen is lighter with a purplish cast. Toe fovea is longitudinal. The chelicerae of the male are narrower and have a tuft of stiff hairs at ht ends. The abdomen of the male has three tergites. Two pairs of spinnerets.
Total Length:
Female carapace length more than 7mm, male carapace length more than less than 5.6 mm
Adult ID:
identifiable by photo of specific features and/or supplementary info
Distribution in North Carolina
Comments:
Found throughout the Appalachians from northeastern Alabama and north to western Pennsylvania and Illinois.
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:
humid, cool, densely forested habitats with sandy loam soil. Balds, forests with Hemlock and Rhododendron. Densest and largest burrow concentrations are usually found in inclined surfaces of slopes and banks along ravines, streams, roads, and trails, at the base of rock outcrops and other sheltered spots.
Observation Methods:
Careful visual observation of burrows during day time, head lamps can locate them near burrow entrance at night. Pitfall traps.
Abundance/Frequency:
Occasional, males wander to breed in mid September through mid October.
Silk / Web:
Burrow lined with silk, various lengths and angles, widened at the entrance and at the base.
Prey:
Any arthropod within 7 centimeters of its burrow entrance, mostly ants and beetles.
Predators:
Parasitized by Pompilid Wasps, centipedes, acrocerid flies, mites and theridiid spiders.
Behavior:
These spiders build cryptic, silk-lined subterranean burrows that are concealed by a collapsible flexible 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 unicolor
- a foldingdoor spider
Photos: 14
Recorded by: Brian Bockhahn on 2023-10-07
Wake Co.
Comment:
Recorded by: Brian Bockhahn on 2023-10-07
Wake Co.
Comment:
Recorded by: Brian Bockhahn on 2023-10-07
Wake Co.
Comment:
Recorded by: Brian Bockhahn on 2023-10-07
Wake Co.
Comment:
Recorded by: Brian Bockhahn on 2023-10-07
Wake Co.
Comment:
Recorded by: Brian Bockhahn on 2023-10-07
Wake Co.
Comment:
Recorded by: Brian Bockhahn on 2023-10-07
Wake Co.
Comment:
Recorded by: Brian Bockhahn on 2023-10-07
Wake Co.
Comment:
Recorded by: Brian Bockhahn on 2023-10-07
Wake Co.
Comment:
Recorded by: Brian Bockhahn on 2021-11-14
Buncombe Co.
Comment:
Recorded by: Steve Hall on 2015-08-15
Cherokee Co.
Comment:
Recorded by: Steve Hall on 2015-08-15
Cherokee Co.
Comment: Came to moth sheet but may have been disturbed from its burrow
Recorded by: Steve Hall on 2015-08-15
Cherokee Co.
Comment: Came to moth sheet but may have been disturbed from its burrow
Recorded by: Steve Hall on 1985-04-00
Orange Co.
Comment:
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