Castianeira

Picture ID 9074

Picture of Castianeira - Dorsal

Comments & ID Thoughts

This spider has been running around my desk for days. It's really fast. It's amazing I was able to get a decent picture. No way I can capture it with a cup. Any idea what it is, habits, and whether I not I should be concerned about it? I've never seen it before and I've lived in North Texas almost 30 years.

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BugmanDan

Hi, and welcome to the site. Your spider looks to be a ground sac spider,Corinnidae family, likely Castianeira SPP. ( Castianeira crocata ??)
https://bugguide.net/node/view/102042
They are not dangerous but they are venomous.

BugmanDan

These are not aggressive, just a bit skittish trying to catch them by hand.
Not likely to bite unless trapped against the skin and for a spider, may sting a bit like a mild bee sting. I worry about accidentally squishing them when they are out of sight.

Additional Pictures

Picture of Castianeira spp. - Dorsal Enlarge Picture
Picture of Castianeira spp. - Dorsal Enlarge Picture
Picture of Castianeira spp. - Dorsal Enlarge Picture
Picture of Castianeira spp. - Dorsal Enlarge Picture