- 8,050 specimens collected from at least 4 countries
- 175 specimens identified from at least 2 countries
- 915 specimens used in 118 works
Progress
Collected From
- United States 6,848
- Mexico 1,157
- United Kingdom 1
- Australia 1
Identified From
- Mexico 157
- United States 18
Dates Collected
- 1855 – 1860 1
- 1920 – 1925 825
- 1925 – 1930 1,485
- 1930 – 1935 515
- 1935 – 1940 1,516
- 1940 – 1945 1,627
- 1945 – 1950 657
- 1950 – 1955 145
- 1955 – 1960 116
- 1960 – 1965 199
- 1965 – 1970 467
- 1975 – 1980 44
- 1995 – 2000 4
Dates Identified
- 1920 – 1925 3
- 1925 – 1930 13
- 1935 – 1940 4
- 1940 – 1945 1
- 1945 – 1950 2
- 1985 – 1990 1
- 2020 – 2025 1