Subject: What kind of spider is this?
Location: Santa Cruz, CA
April 6, 2014 8:59 am
I found this fast moving spider last night and can’t identify it for the life of me. It was black with white and the body markings are not that of a wolf, which is brown anyway. It quickly escaped my observation jar and is maybe hiding behind the stove. I don’t mind sharing space with it as long as it’s not an intense biting creature!
This is a harmless Ground Spider in the family Graphosidae, and we believe we have correctly identified it on Bugguide as Sergiolus montanus, though it might be a different species in the same genus because according to BugGuide, it is : “Very similar to other species of Sergiolus; a microscopic exam of genitalia is required for clear identification.” Your individual looks very similar to this individual from California pictured on BugGuide.