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House Spider (Metaltella simoni)


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

 Updated: 1/24/2019; Authored By Staff Writer; Content ¬©www.InsectIdentification.org




One of many types of House Spiders, Metaltella simoni actually came a long way to make itself at home in yours.



The dark brown House spider, M. simoni is native to the eastern South American countries of Argentina, Brazil and Uruguay. It arrived in North America in the 1900's via trade routes between the two continents. It has established a stable presence in the warm, humid states along the Gulf of Mexico as well as parts of California. M. simoni appears to be outcompeting native spiders, like T. brunnea, for resources, which is cause for concern in those regions.

This House Spider is not known to be harmful to humans. Its gangly legs and dark body make it easy to spot on light-colored ceilings and walls. It is also comfortable living outdoors and can be found on trees, on the ground and under rocks and leaf litter. Its web is a fluffy mess of spider silk that has been combed out to maximize its efficacy. Females lay fertilized eggs in a sac of bumpy silk and hide it using dirt, debris or other nearby material.

This spider is commonly mistaken for a Brown Recluse (even though it clearly lacks the tell-tale dark 'violin-shaped' mark on its head) as well as the non-aggressive Hacklemesh Weaver spider.




Taxonomic Hierarchy
Kingdom: Animalia
  Phylum: Arthropoda
    Class: Arachnida
      Order: Araneae
        Family: Amphinectidae
          Genus: Metaltella
            Species: simoni
Identifying Information
Scientific Name: Metaltella simoni
Category: Spider
Size (Adult; Length): 6mm to 10mm (0.23in to 0.39in)
Colorwheel Graphic Colors: brown, black
Descriptors: shiny, glossy, scrawny
Territorial Map
Alaska  
Hawaii  
Prince Edward Is.  
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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).