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Pseudoscorpion ( )

Detailing the physical features, habits, territorial reach and other identifying qualities of the Pseudoscorpion

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Incredibly tiny Pseudoscorpions are harmless hitchhikers that usually go unnoticed.

Updated: 04/30/2022; Authored By Staff Writer; Content ©www.InsectIdentification.org
Although they look like really small scorpions, Pseudoscorpions lack a tail or stinger. They have venom glands in their claws meant to kill tiny mites and springtails. They are so small, however, they pose no threat to humans and would require a magnifying glass in order to get a really good look at them. Because they do not have wings, traveling long distances can be difficult. Their minute stature allows them to catch free rides on oblivious larger insects, like beetles and even flies. Some species are blind, but even those with sight are not able to see well. They use their claws like antennae, feeling and touching their surroundings to find their way around.

Pseudoscorpions can make their own silk, but they do not spin webs or use it to catch prey like a spider would. Instead, they build cocoons to shelter in during cold winters. Look for them in a variety of places: between book pages, at the water's edge, in caves, woods, under rocks, and maybe even in a house (bathroom, laundry room, etc.).©InsectIdentification.org

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General Characteristics

Capability, Shape, Texture/Pattern, Benefits, Dangers
Flying insect icon
Harmless insect icon
Venomous insect icon

Taxonomic Hierarchy

Species Breakdown
Kingdom: Animalia
  Phylum: Arthropoda
    Class: Arachnida
      Order: Pseudoscorpioninda
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Identifying Information

Size, Colors, Features
Scientific Name:  
Category: Pseudoscorpion
Size (Adult; Length): 3mm to 5mm (0.11" to 0.19")
Colorwheel Graphic Colors: brown
Descriptors: pincers; spider; tailless; venomous; harmless; wingless; bathroom

Relative Size Comparison

Typical Size Between 3mm (0.1in) and 5mm (0.2in)
Lo: 3mm
Md: 4mm
Hi: 5mm

Territorial Map*

U.S., Canada, and Mexico
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Territory map graphic of the country of Mexico
Contiguous United States shape map layer graphic
Prince Edward Is.  
* MAP NOTES: The territorial heat map above showcases (in red) the states and territories of North America where the Pseudoscorpion may be found (but is not limited to). This sort of data is useful when attempting to see concentrations of particular species across the continent as well as revealing possible migratory patterns over a species' given lifespan. Some insects 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. States/Territories shown above are a general indicator of areas inhabited by the Pseudoscorpion. Insects generally go where they please, typically driven by diet, environmental changes, and / or mating habits.
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