Adult Male Megahexura fulva
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.