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Collection place
- North America4
- The Americas4
- United States4
- California2
- Churchill County, Nevada1
- Colorado River, Southwestern United States1
- Lower Colorado River, Southwestern United States1
- NV-Ch-18 (Lovelock Cave), Churchill County, Nevada1
- Nevada1
- Northern California1
- Northwestern California1
- San Diego County, California1
- Southern California1
- Southwestern United States1
- Yuma Reservation, San Diego County, California1