This adult male Megahexura fulva was collected Branden Runyan, October 2017, Dorrington, Calaveras County, CA. Thanks to Dr. Marshal Hedin for the identification.
This is from Wikipedia: “Megahexura is a genus of spiders in the family Mecicobothriidae, with the sole species Megahexura fulva. Native to the United States, the spiders build an exposed sheet web with a funnel-shaped retreat in holes and crevices along ravine banks.”
This is a link to an image of the female, taken by Dr. Marshall Hedin.