What's That Bug? does not endorse extermination

Subject: Tarantula maybe
Location: San Antonio, TX
September 19, 2014 6:16 am
Can you help me identify this spider I found floating in my pool. When I got it out I was surprised it was alive. It is about 2 inches long and the body is 1/2 inch wide. I did not see it spread out its legs. Is it dangerous?
Signature: Lisa

Trapdoor Spider

Trapdoor Spider

Dear Lisa,
This is a Trapdoor Spider, and though it is theoretically not a Tarantula, it is classified with the Tarantulas in the infraorder Mygalomorphae, and according to BugGuide, the Mygalomorphs are:  “Easily distinguished from araneomorphs by two pairs of booklungs; fangs and chelicerae are parallel to the body axis.”
  BugGuide also notes:  “This is a more primitive group of spiders which includes the infamous tarantulas, primarily represented by members of Family Theraphosidae. Other familiar members include the trapdoor spiders and purseweb spiders.

What's That Bug? does not endorse extermination
Location: San Antonio, Texas

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