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Crab Spider (Tmaurs spp.)

Detailing the identifying qualities of the Crab Spider, including physical features and territorial reach.

 Updated: 8/2/2017; Authored By Staff Writer; Content ¬©

  Crab Spider  
Picture of Crab-Spider-Tmarus

The long front legs of Crab Spiders and occasional sideways walk demonstrates their distant relationship to more familiar marine crabs.

Crab Spiders have front legs that are considerably longer than the others. Species in the Tmarus genus stretch them out in front of themselves while resting on branches and twigs. This position resembles that seen in Long-jawed Spiders. Tmarus spiders have brown mottled coloring that camouflages them. Crab Spiders are active hunters and do not spin webs to trap prey. Their ability to blend in with foliage makes it easier for them to capture unsuspecting, or oblivious, insect prey.

Crab Spider Information

Category: Spider
Common Name: Crab Spider
Scientific Name: Tmaurs spp.

Taxonomy Hierarchy

 Arrow graphic Kingdom: Animalia
  Arrow graphic Phylum: Arthropoda
   Arrow graphic Class: Arachnida
    Arrow graphic Order: Araneae
     Arrow graphic Family: Thomisidae
      Arrow graphic Genus: Tmaurs
       Arrow graphic Species: spp.

Size, Identifying Tags and Territorial Reach

Size (Adult, Length): Size (Adult, Length): 3 mm to 5 mm (0.117 inches to 0.195 inches)
Identifying Colors: brown, tan
Additional Descriptors: legs, straight, front, skinny, venomous

North American Territorial Reach (Though Not Limited To): Alabama; Alaska; Arizona; Arkansas; California; Colorado; Connecticut; Delaware; 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; Alberta; British Columbia; Manitoba; New Brunswick; Newfoundland and Labrador; Nova Scotia; Ontario; Prince Edward Island; Quebec; Saskatchewan; Mexico

A Note About Territorial Reach: Keep in mind that 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. Insects are driven by environmental factors, food supplies and mating patterns and do not nescessarily work within hard-and-fast territorial lines like we humans do.

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