Insect Identification logo
Icon of a spider
Icon of a beetle insect
Icon of a butterfly
Icon of a bee
Icon of the Bugfinder utility

Yellow Sac Spider (Chiracanthium inclusum)


Detailing the physical features, habits, territorial reach and other identifying qualities of the Yellow Sac Spider.

 Updated: 3/15/2014; Authored By Staff Writer; Content ¬©www.InsectIdentification.org




Yellow Sac Spiders have no qualms about biting people that threaten or disturb it, whether deliberately, or accidentally.



This albino-looking spider is commonly found in homes, high up on walls or crawling on ceilings. Yellow Sac Spiders usually only venture indoors during winter months to escape the cold and frost. Their black feet make them easier to spot on light walls/ceilings. Their natural habitat is outdoors in grass, shrubs and other vegetation. Research shows that their body colors slightly reflect the color of the insect most recently consumed. This is why differences in hue (rosy, greenish, etc) can be seen within the species.

This species is slightly more aggressive than most house spiders and will bite, perhaps repeatedly, if threatened. Most contact with yellow sac spiders is accidental for its part. They tend to hide in piles of clothes (clean or dirty) and bite if they feel pressure when the clothes are picked up and/or put on.

There is no consensus on how toxic the bite of this spider may be, although it is not known to be deadly. The initial bite can be painful to some people, but unnoticed by others. For some, a small red bump will form and eventually fade after a couple of weeks. In others, swelling, burning and pain are experienced the first hour or so after the bite, then a pustule develops that naturally heals over a couple of weeks. If bitten, it is suggested that the spider is caught (not smashed) so it can be identified if the bite develops into a serious skin infection. Contact your physician if it appears this spider's bite is growing worse.




Taxonomic Hierarchy
Kingdom: Animalia
  Phylum: Arthropoda
    Class: Arachnida
      Order: Araneae
        Family: Miturgidae
          Genus: Chiracanthium
            Species: inclusum
Identifying Information
Scientific Name: Chiracanthium inclusum
Category: Spider
Size (Adult; Length): 5mm to 10mm (0.20in to 0.39in)
Colorwheel Graphic Colors: white; yellow; black; green
Descriptors: biting, venomous
Territorial Map
Alaska  
Hawaii  
Prince Edward Is.  
State of Alabama graphic
State of Arizona graphic
State of Arkansas graphic
State of California graphic
State of Colorado graphic
State of Delware graphic
State of Florida graphic
State of Georgia graphic
State of Idaho graphic
State of Illinois graphic
State of Indiana graphic
State of Iowa graphic
State of Kansas graphic
State of Kentucky graphic
State of Louisiana graphic
State of Maine graphic
State of Maryland graphic
State of Michigan graphic
State of Minnesota graphic
State of Mississippi graphic
State of Missouri graphic
State of Montana graphic
State of Nebraska graphic
State of Nevada graphic
State of New England graphic
State of New Jersey graphic
State of New Mexico graphic
State of New York graphic
State of North Carolina graphic
State of North Dakota graphic
State of Ohio graphic
State of Oklahoma graphic
State of Oregon graphic
State of Pennsylvania graphic
State of South Carolina graphic
State of South Dakota graphic
State of Tennessee graphic
State of Texas graphic
State of Utah graphic
State of Virginia graphic
State of Washington graphic
State of West Virginia graphic
State of Wisconsin graphic
State of Wyoming graphic
Canadian territory of Alberta graphic
Canadian territory of British Columbia graphic
Canadian territory of Manitoba graphic
Canadian territory of New Brunswick graphic
Canadian territory of Newfoundland and Labrador graphic
Canadian territory of Ontario graphic
Canadian territory of Quebec graphic
Canadian territory of Saskatchewan graphic
Territory map graphic of the country of Mexico
Contiguous United States shape map layer graphic


Territorial Reach (A-to-Z)
Alabama
Alaska
Arizona
Arkansas
California
Colorado
Connecticut
Delware
Florida
Georgia
Hawaii
Idaho
Illinois
Indiana
Iowa
Kansas
Kentucky
Louisiana
Maine
Maryland
Massachusetts
Michigan
Minnesota
Mississippi
Missouri
Montana
Nebraska
Nevada
New Hampshire
New Jersey
New Mexico
New York
North Carolina
North Dakota
Ohio
Oklahoma
Oregon
Pennsylvania
Rhode Island
South Carolina
South Dakota
Tennessee
Texas
Utah
Vermont
Virginia
Washington
West Virginia
Wisconsin
Wyoming
Canadian National Flag Graphic
Alberta
British Columbia
Manitoba
New Brunswick
Newfoundland and Labrador
Nova Scotia
Ontario
Prince Edward Island
Quebec
Saskatchewan
Mexican National Flag Graphic
Mexico
Note: An insect's reach is not limited by lines drawn on a map and therefore species may appear in areas, regions and/or states beyond those listed above as they are driven by environmental factors (such as climate change), available food supplies and mating patterns. Grayed-out selections indicate that the subject in question has not been reported in that particular territory. U.S. states and Canadian provinces / territories are clickable to their respective bug listings.




Spider Anatomy
Graphic showing basic parts of spider anatomy
1
Legs: Spiders have four pairs of legs and these are attached to the cephalothorax.
2
Pedipalps: Small appendages near the mouth used as taste and smell organs.
3
Cephalothorax: Contains eyes, head, mouthparts, and legs.
4
Abdomen: Contains various organs related to digestion, reproduction, and web-making.
5
Spinnerets: Used in the production of spider silk for fashioning webs or catching prey.
NOTE: Unlike insects, spiders have both an endoskeleton (internal) and exoskeleton (external).