site | site # (info) | collection date | kind | depth | substrate | salin | comments | reference | |
---|---|---|---|---|---|---|---|---|---|
A | Myvatn, north Iceland | 600 map | summer 1937 | freshwater | few specimens at Laxa at the mouth of Myvatn near Smiojutjörn | Steinböck O (1948): 27 | |||
B | Laugarvatn, south Iceland | 599 map | summer 1937 | freshwater | Many specimens. | Steinböck O (1948): 27 | |||
C | Iceland (Island) | 596 map | summer 1937 | freshwater | few specimens found at Geldingaey, east of the bridge. | Steinböck O (1948): 27 | |||
D | near weir at Geesthacht, Germany | 1622 map | Jul 1991 | sand | freshwater | many specimens. sandy sediments, sandy tidepools covered with detritus; free of vegetation | Müller D, Faubel A (1993): 370 | ||
E | Geesthacht, Germany | 1623 map | Jul 1991 | sand | freshwater | many specimens. sandy to muddy sediments, lenitic eulittoral area | Müller D, Faubel A (1993): 370 | ||
F | Krauel, Germany | 1624 map | Jul 1991 | mud | freshwater | many specimens. muddy substrates covered with algae | Müller D, Faubel A (1993): 370 | ||
G | Norfolk, Virginia, USA | 1883 map | 1948 or earlier | shallow | freshwater | from collection records ranging 1931 thru 1948. Norfolk Golf Course ponds. | Ferguson FF, Jones ER (1949): 436, 438 |