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 | Illinois, Iowa, Wisconsin, Minnesota, Mississippi Basin, USA | 1915-1917 | freshwater | several locations in the Mississippi study area. No location specified. | Higley R (1918) 12-17, 38 | |||
| B | Sevastopol (Sebastopol, Sewastopol, Akhiar, Akhtyar), Black Sea, Ukraine. | 1870 or earlier | 10 m | type locality | Schwarzes Meer (Pawlowsky'sche Insel bei Sewastopol). | Uljanin WN (1870) 10; Graff L v 1882 (citation)- p 239; from Graff L v 1913 (citation)- p 47 |