Overlapping markers can be separated by clicking on them.
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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 | Norfolk, Virginia, USA | 1948 or earlier | shallow | fresh | from collection records ranging 1931 thru 1948. from ponds and streams in the Norfolk area. | Ferguson FF, Jones ER (1949) 436, 438 | ||
| B | Southeastern New York State, USA | prior to 1987 | freshwater | 4 specimens from stream surface sediments, 9 specimens from interstitial waters, and 4 specimens from springs. | Kolasa J, Strayer D, Bannon-O'Donnell E (1987) 127 |