04 October 1982.
Hidalgo, Mexico
Locality: Hwy 45 from Huichapan to Ixmiquilan 62 km W of the intersection with Hwy 57.
Coordinates: 20.4333, -99.4333
(Map it)
Elevation: 2380m.
Environment description: Side of an arroyo on which there is a series of small dams; under rocks, and Quercus.