Endemic to Mexico: S Zacatecas (Sierra de Morones near Juchipila). A second location, La Muralla in Durango, has recently been reported (Gonzalez-Elizondo et al. 2011). It was discovered in December 2010. The extent of occurrence is estimated to be about 376 km2 with an actual area of occupancy estimated to be about 35 km2.
No one has provided updates yet.