Hasthagen (Hästhagen), Sweden
latitude: 59.299999     59°17'60"N
longitude: 18.15     18°9'0"E
[Precision of location: Alexandria Digital Library (with NGA GNDB data)] 
[Site Named Here by name of site (or city, etc.)] 
| Castrella (Castrella) alba Luther, 1955 | Apr 18-19, 1950 | N. Tvärminne, Zoo. Stat., Hästhagen, Graben mit bald stehendem, bald schwach fliessendem Wasser (oft austrocknend), hummusreicher Boden, viel totes Laub. Im Darm fanden sich Diatomeen, kleine grüne Algen, Euglypha etc. | 
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