site | site # (info) | collection date | kind | depth | substrate | salin | comments | reference | |
---|---|---|---|---|---|---|---|---|---|
A | Hopewell Junction, New York, USA | 1507![]() | around 1940 | type locality | freshwater | a pond near Hopewell Junction, New York, 60 miles north of New York City. Four specimens. | Hyman LH (1955): 15 | ||
B | Philadelphia, Pennsylvania, USA | 2221![]() | 1847 or earlier | type locality | freshwater | ditches. | Leidy J (1847): |