Bothriocyrtum californicum
(California Trapdoor Spider)

Picture ID 3876

Picture of Bothriocyrtum californicum (California Trapdoor Spider) - Male - Dorsal

Comments & ID Thoughts

Found at the bottom of our pool. Fished it out and thought it was dead. About an hour later it started to move!

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ItsyBitsy

Hi, welcome to Spider ID. 🙂 Oh my goodness, I think this is the 4th ID request for one of these in roughly the last two days ~ … so far as I can tell is it a California Trapdoor Spider (Bothriocyrtum californicum).

For comparison:
https://bugguide.net/node/view/1176231/bgimage

An article about spiders surviving near drowning:
https://news.nationalgeographic.com/news/2009/04/090424-spider-resurrection-coma-drowning.html

ItsyBitsy

Note to admin.: should “swimming pool” be added to outdoor traits?

ItsyBitsy

You’re welcome. Wow, me too. 😮

Bfish

I saw the exact same thing today, Sorrento Valley area of San Diego. https://spiderid.com/picture/3898/. Also, look up/compare this to: https://australianmuseum.net.au/image/southern-tree-funnel-web-spider, the two things sticking out of the back…

ItsyBitsy

The protrusions coming out of the back of the spider’s abdomen are spinnerets, they are organs used during silk production. All spiders have them. Please compare the unique shape of the first pair of legs of a male Bothriocyrtum californicum (California Trapdoor Spider) instead when comparing these two species. https://bugguide.net/node/view/1176231/bgimage On the male Sydney Funnel-web Spider it is the second pair of legs with a noticeably remarkable shape. https://australianmuseum.net.au/image/sydney-funnel-web-spider-atrax-robustus Edit: Searching for a lateral of Hadronyche cerberea. Edit #2: I didn’t see a good lateral of Hadronyche cerberea but you can still glean from the dorsal image that the legs… Read more »

Additional Pictures

Picture of Bothriocyrtum californicum (California Trapdoor Spider) - Male Enlarge Picture
Picture of Bothriocyrtum californicum (California Trapdoor Spider) - Male - Ventral Enlarge Picture
Picture of Bothriocyrtum californicum (California Trapdoor Spider) - Male - Dorsal Enlarge Picture
Picture of Bothriocyrtum californicum (California Trapdoor Spider) - Male - Dorsal Enlarge Picture