- 49 specimens collected from at least 3 countries
- 10 specimens identified from at least 2 countries
- 20 specimens used in 7 works
Progress
Collected From
- United States 42
- Greenland 4
- South Africa 3
Identified From
Dates Collected
- 1965 – 1970 3
- 1970 – 1975 2
- 1975 – 1980 28
- 1980 – 1985 9
- 1985 – 1990 1
- 1990 – 1995 3