quadrangular pillclam
- kingdom: Animalia
- phylum: Mollusca
- class: Bivalvia
- order: Venerida
- family: Sphaeriidae
- genus: Pisidium
- species: Pisidium milium
Achau
Lower Austria
Braunau am Inn
Upper Austria
Austria
Dolní Poustevna
Ústecký
Czech Republic
Burglauer
Niederlauer
Simbach am Inn
Bavaria
Hedeper
Lower Saxony
Herne
North Rhine-Westphalia
Langsur
Oberbillig
Palzem
Rheinland-Pfalz
Germany- Luxembourg
Utrecht
Utrecht
Netherlands
Saignelégier
Jura
Kirchberg
Saint Gallen
Einsiedeln
Schwyz
Switzerland
Briston
England
United Kingdom
Lake Villa
Illinois
United States
Beaufort