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Langholmen (Långholmen, Langholm, Långholm), Finland
[there are several islands in Finland named Långholmen, not sure this was the location that Luther 1960 referenced, although the coordinates are closest to the Zoolog. Station Tvarminne]
latitude: 59.883301
longitude: 22.549999
Precision of location: Alexandria Digital Library (with NGA GNDB data)
Site Named Here: By name of site (or city, etc.)
| Macrostomum balticum | prior to 1960 | 2.5-3.0 m | sand, gyttja | between Vikarskär and Långholmen. All specimens found between June and August. |
| Bresslauilla relicta | 1961 or earlier | humus, sand | meadow bank north of Bönholmen-Långholmen, ca 40 cm ü.d. Strong freshwater influence at sea level. | |
| Provortex pallidus | 1962 or earlier | |||
| Provortex karlingi | 1962 or earlier | between Långholmen and Vikarskär. | ||
| Planaria torva | 1961 or earlier | Einwärts liegen u.a. folgende Fundorte vor: Tvärminne Långholmsbranten u. Bönholmsviken. | ||
| Anthopharynx vaginatus | 1963 or earlier | 3 m | Sand, mud | N. Tvärminne-Gebiet: Zwischen Vikarskär und Långholmen, Sand mit Schlick (A.L.) |