14 October 1983.
Coahuila de Zaragoza, Mexico
Locality: Near Saltillo, Los Lirios, 50 km from Saltillo on the road to Allende, in the village itself.
Coordinates: 25.3667, -100.6333
(Map it)
Elevation: 2340m.
Environment description: By a stone fence with big Opuntia.