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Tvijälp (Tvielp, Tvihjelp, Tvihjälp ), Finland
latitude: 60.155834
longitude: 24.805555
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
| Thalassoplanella collaris | 1963 or earlier | Lappvik. Helsingfors, bei Tvielp. |