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Sac Spider (Trachelas spp.)


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


 Updated: 2/3/2014; Authored By Staff Writer; Content ¬©www.InsectIdentification.org



  Sac Spider  
Picture of Sac-Spider
Picture of Sac-Spider Picture of Sac-SpiderPicture of Sac-SpiderPicture of Sac-Spider


Sac Spiders should be a good incentive to keep up with the laundry. They like to hide in the clothes and will bite their way out if they have to.





When it comes to catching prey, Sac Spiders are predatory hunters, not web weavers. They use their spider silk to weave tent-like sacs between leaves or on tree trunks for retreats though. Sac Spiders are fast runners. They may appear tan, yellowish or even slightly greenish. Only 8 native species inhabit North America.

The group of various Sac Spiders are known to deliver painful bites to humans. These spiders are not outright aggressive, but if threatened, they bite defensively. Because they are wanderers, they sometimes rest in a pile of clothes (clean or dirty) that have been left on the floor. When someone moves it, or puts on something from the pile, the Sac Spider may get trapped between the clothing and the person's skin and bite him/her to escape.

Like all spiders (except Cribellate Orbweavers), they produce a venom designed to immobilize their insect prey. While their venom is not seriously dangerous like a Brown Recluse's or Black Widow's, Sac Spider bites are slow to heal. It is not uncommon for the bite area to get infected as victims frequently scratch or touch it.
Basic Information
Common Name: Sac Spider
Scientific Name: Trachelas spp.
Category: Spider


General Identification
Size (Adult; Length): 5mm to 8mm (0.20in to 0.31in)
Colorwheel Graphic
Identifying Colors: red; brown; tan; green; yellow
Additional Descriptors: biting, venomous




Taxonomic Hierarchy
Kingdom: Animalia
Phylum: Arthropoda
Class: Arachnida
Order: Araneae
Family: Corinnidae
Genus: Trachelas
Species: spp.


Spider Anatomy (Typical)
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).


Territorial Reach (A-to-Z)
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 below as they are driven by environmental factors (such as climate change), available food supplies and mating patterns. Grayed-out selections below 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.
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


Territorial Area Map (Visual Reference Guide)
The map below showcases (in red) the states and territories of North America where the Sac Spider may be found (but is not limited to). This sort of data can be useful in seeing concentrations of a particular species over the continent as well as revealing possible migratory patterns over a species' given lifespan. Some species are naturally confined by environment, weather, mating habits, food resources and the like while others see widespread expansion across most, or all, of North America.
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


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