Collecting site
Gennarbyviken, Finland
latitude: 60.033333     60°1'60"N
longitude: 23.316668     23°19'0"E
[Precision of location: Alexandria Digital Library (with NGA GNDB data)] 
[Site Named Here by name of island, bay, strait, lake, river, or stream, etc., named in source publication] 
Collected here:
| Castrada (Castrada) hofmanni Braun, 1885 | Aug 14, 1962 |  |  | Tenala, Gennarbyviken. | 
| Mesostoma lingua (Abildgaard, 1789) | 1963 or earlier |  |  | auf Potamogeton und Cordylophora u. westlich von Hylta auf Najas marina (Purasjoki coll., A.L. det.) |