DistributionRead full entry
Range DescriptionThis species is endemic to Mexico. Since it was discovered near San Pedro (Coahuila) by Moeller (Fitz Maurice 1997), the species has also been found at Viesca (Coahuila) and in Durango (about 100 km apart) and it may occur at other places in between (W.A. Fitz Maurice pers. comm. 2009). The subpopulation in southwestern Coahuila is reported to have somewhat diminished (W.A. Fitz Maurice 2002). The area of occupancy of the species across all three locations is less than 10 km². It grows at about 1,400 m asl.