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What kind of spider is this? #432569

Asked October 24, 2017, 4:24 AM EDT

My cat was playing with this spider in my living room, this is the first time I have ever seen this kind of spider here at my house or just in general. It’s a little bit bigger than a quarter. I don’t live near mountains, rivers or the woods. If anyone could help I would appreciate it! Thank you!!

Napa County California

Expert Response

Dear Client,

Your spider is called a California tube trapdoor spider, Calisoga longitarsis .   While it is closely related to the tarantulas, it is sometimes called a false tarantula. "These spiders live in burrows. Some finish these with a hinged door. They often push this door up and wait for passing prey. When they catch it they try not to leave their burrow. Sometimes a burrow has a side tube. It is not certain whether Sinopesa builds burrows."

https://en.wikipedia.org/wiki/Nemesiidae

https://www.inaturalist.org/taxa/50989-Calisoga-longitarsis

Overall, spiders are considered beneficial organisms as they feed on other insects.  When they get into homes they are more of a nuisance.  I would gently capture then release this spider outdoors.

Hope this helps!

An Ask Extension Expert Replied October 26, 2017, 2:17 PM EDT

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