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Collection place
- North America51
- The Americas51
- United States51
- California37
- Northern California37
- CA-Hum-112, Humboldt County, California35
- Humboldt Bay, Humboldt County, California35
- Humboldt County, California35
- Northwestern California35
- South Spit, Humboldt Bay, Humboldt County35
- Douglas County, Nevada14
- NV-Do-12 (Hobo Hot Springs), Douglas County, Nevada14
- Nevada14
- CA-Teh-210, Tehama County, California2
- North Central California2
- Tehama County, California2