These are close up images of a Spider that I believe is an adult male Primitive Hunting Spider, Plectreurys tristis. Please note that the BugGuide does not have a species page for this spider yet. I'm including extra shots of him in bright sunlight and in the shade, to help other people when comparing images. I have reviewed the palp drawings for every species in this genus, because that is all that I can find for ID info on the internet, so far. Also, I'm not sure about the geographic range of the other species, but most of them are not known to live in Arizona and P. tristis is known to live in this area. Here is a link to the ID source document on the spider family Plectreuridae that I used, from the American Museum of Natural History (PDF)(54 pages - dated 1958):
AMNH Digital Library - The Spider Family Plectreuridea
Here is a link to his video:(3.5min. duration)
♂ Primitive Hunting Spider - Species?
NOTE: Though his coloring is mostly all black, some things can be seen here and in the other images. Slightly paler, grayish or off-white spots, on the ventral side of the leg joints are visible in some of the other views. Also, he has an obvious, thick grey stripe, on the top front, middle of his abdomen. The carapace is smooth and shiny near the eyes and the rest of it is more matted, but it's almost hairless and still more shiny looking than the abdomen.
Please confirm, move or frass these images. Thanks for your help!