Station M69, West spit (Punta Weather), Guafo Island, southwest of Chiloé, Chile    (Ref.: Marcus E 1954)

Southeastern New York State, USA    (Ref.: Kolasa J, Strayer D, Bannon-O'Donnell E 1987)

Ejde (Eidhi), (North of Ejde), Faroes, freshwater lake, Faroe Islands    (Ref.: Steinböck O 1931)

Woods Hole,Cape Cod, Massachusetts, USA    (Ref.: Bush LF 1964)

Nobska Point , Woods Hole, Massachusetts, USA    (Ref.: Bush LF 1964)

Krauel, Germany    (Ref.: Müller D, Faubel A 1993)