Overlapping markers can be separated by clicking on them.
Hovering the cursor over a marker will show the site's name.
Clicking on a marker will show information available about the collection site. (Compare with corresponding letter in table.)
| site | collection date | depth | substrate | salin | locality kind | comments | reference | |
|---|---|---|---|---|---|---|---|---|
| A | Marsh Creek, Adams County, Pennsylvania, USA | April 19, 1931 | Freshwater | type locality | near "Black Horse Tavern" | Gilbert CM (1935) 289 | ||
| B | Brandywine Creek, New Castle County, Delaware, USA | Apr 15, 1954 | freshwater | swampy place off Brandywine Creek, New Castle County, Delaware. Collected by Dr. Miriam Pennypacker. | Hyman LH (1955) 15 |