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 | Philadelphia, Pennsylvania, USA | 1847 or earlier | freshwater | type locality | ditches. | Leidy J (1847) | ||
| B | Hopewell Junction, New York, USA | around 1940 | freshwater | type locality | a pond near Hopewell Junction, New York, 60 miles north of New York City. Four specimens. | Hyman LH (1955) 15 |