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Shawnee National Forest, Union County, Illinois, USA
latitude: 37.494499
longitude: -89.383102
Precision of location: Gauged from chart or map
Site Named Here: By name of site (or city, etc.)
| Phagocata gracilis | 1966 or earlier | Elm Spring, in Pine Hills area of Shawnee National Forest, moderate current, 13.2 degrees C., pH 7.3. Under stones many specimens, some mature, besides less numerous Procotyla fluviatilis. | ||
| Procotyla fluviatilis | 1966 or earlier | Elm Spring, in Pine Hills area of Shawnee National Forest, moderate current, 13.2 degrees C., pH 7.3. Under stones. |