site | site # (info) | collection date | kind | depth | substrate | salin | comments | reference | |
---|---|---|---|---|---|---|---|---|---|
A | Brandywine Creek, New Castle County, Delaware, USA | 1508 map | Apr 15, 1954 | freshwater | swampy place off Brandywine Creek, New Castle County, Delaware. Collected by Dr. Miriam Pennypacker. | Hyman LH (1955): 15 | |||
B | Marsh Creek, Adams County, Pennsylvania, USA | 1675 map | April 19, 1931 | type locality | Freshwater | near "Black Horse Tavern" | Gilbert CM (1935): 289 |