Curls into a ball when touched. Very shiny black but no red underneath. Spun a web in the jar.
I think this a Steatoda Grossa (black faulse widow) however without seeing its abdomen (if it has a red marking shaped like an hourglass, it’s a true black widow) either way, it may carry harmful venom… here is an article I found on line: *Medical Importance False black widows produce symptoms that are similar to but much less severe than those of a true black widow bite. There are documented cases of Steatoda bites leading to blistering at the site of the bite and a general malaise lasting for several days. Additionally, symptoms can include moderate to severe pain increasing… Read more »
Steatoda borealis, False Widow