- 2,552 specimens collected from at least 5 countries
- 352 specimens identified from at least 3 countries
- 34 specimens used in 3 works
Progress
Collected From
- United States 1,714
- Sweden 83
- Canada 36
- Denmark 1
- United Kingdom 1
Identified From
- United States 315
- Canada 25
- Italy 2
Dates Collected
- 1900 – 1905 4
- 1905 – 1910 492
- 1910 – 1915 335
- 1915 – 1920 221
- 1920 – 1925 188
- 1925 – 1930 186
- 1930 – 1935 196
- 1935 – 1940 414
- 1940 – 1945 264
- 1945 – 1950 79
- 1950 – 1955 28
- 2000 – 2005 5
Dates Identified
- 1905 – 1910 14
- 1910 – 1915 7
- 1915 – 1920 3
- 1920 – 1925 2