Habitat: Slopes and ridges in Chihuahuan woodland.
Range: Known openly from a few localities in west Texas including Chisos Mountains in Big Bend National Park.
Conservation: Population in Big Bend National Park (subspecies chisosensis) should be monitored and conserved. Surveys for other populations in west Texas and neighboring Mexico are recommended.
NCGR: G1 - critically imperiled because of extreme rarity (5 or fewer occurrences, or very few remaining individuals).
Management Needs: None reported.
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