Pisidium


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Pisidium

 

a genus of freshwater bivalves of the Sphaeridae family. The shell is oval (length 2–10 mm) with its apexes directed toward the rear. The animals are found in fresh bodies of water on all continents. In the USSR there are a few dozen genera in a great variety of waters, including rivers, lakes, ponds, pools, and underground waters. They feed on bacteria and organic residues suspended in the water; they are eaten by certain fish.

References in periodicals archive ?
Nuclear DNA content in two Chilean species of Pisidium (Veneroida: Sphaeriidae).
In laboratory, animals were determined to species level, except Oligochaeta, Ostracoda, Pisidium and Sphaerium clams, leeches, insect larvae, and juvenile gammarids.
2000) as the bivalves Pisidium amnicum (Muller, 1774) and the snails Valvata profunda (Clessin, 1887) and Valvata depressa (Pfeiffer, 1828).
At the foot of the mountains near Mutwanga town, we collected specimens of Pisidium cf.
Environmental heterogeneity and life history variability in freshwater clams, Pisidium variabile (Prime) and Pisidium compressum (Prime) (Bivalvia: Pisidiidae).
By far the most abundant mollusks throughout the marls of the Wilkinson deposit were Valvata tricarinata, Gyraulus parvus, Amnicola limosa and Pisidium spp.
In Chile, sphaerids are represented by 3 genera and 11 species: Pisidium with 7 species, Sphaerium with 2 species, and Musculium with 2 species (Parada & Peredo 2002).
Sphaeriidae was identified to family at IDEM3, IDEM7, INHS1, and INHS6; Pisidium at TAMS2 and INHS1; and Sphaerium at TAMS1, TAMS2, and INHS4.
argentinum, as shown by gonad section examination during the study period, gametogenesis is a continuous process and is coincident in this respect with Pisidium dubium (Say, 1817) (Araujo & Ramos 1999) and Corbicula australis (Lamarck, 1818) (Byrne et al.