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 | Grandview, Iowa, USA | 1915-1917 | freshwater | type locality | clear pond with sandy bottom near Grandview. | Higley R (1918) 12-17, 30 | ||
| B | Fairport, Iowa, USA | Jul 1917 | freshwater | large numbers in early July. Almost complete disappearance by the first of August. | Higley R (1918) 12-17, 35 |