Dinothrombium
Pena Blanca Lake
Santa Cruz County, Arizona
Coordinates: 31.399943, -111.089978
Elevation: 3,904 ft
July 25, 2020
Found dozens of these creatures walking actively on rocks and soil around 10:30 AM in a partially cloudy, relatively cool (mid 80s) summer day
Determined by Salvador Vitanza
Confirmed by Ray Fisher