Pisidium


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The following article is from The Great Soviet Encyclopedia (1979). It might be outdated or ideologically biased.

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.

The Great Soviet Encyclopedia, 3rd Edition (1970-1979). © 2010 The Gale Group, Inc. All rights reserved.
References in periodicals archive ?
Dentro de estos, Pisidium (Bivalvia) presento el mayor numero de organismos (52 278), seguido de la subfamilia Naidinae genero Nai (9 283) y Dugesia (1 886).
crassus Philipsson, and Pisidium sp., as well as the omnivorous larvae of Chironomus spp.
Small clams in the family Sphaeriidae consist of the genera Musculium, Sphaeriium, and Pisidium. Although these clams are known from the Laurentian Great Lakes of the United States and Canada, this study focuses on the variation of sphaeriids between the central and western basins of Lake Erie.
Temperature- and parasite-induced changes in toxicity and lethal body burdens of pentachlorophenol in the freshwater clam Pisidium amnicum.
Digenean parasites of the bivalve mollusc Pisidium amnicum in a small river in eastern Finland.
Note also that most of the molluscs consumed in this study were represented by species such as Pisidium sp., Sphaerium sp., Lymnea sp.
In contrast, Sphearium sp., Psephanidae, Tubificidae, Corixidae, Phreodriliidae, Ancylidae, Pisidium sp., Tipuliidae, Capilariventridae, Dytiscidae Lumbriculidae, and Leptophlebbiidae were highly associated with open bank habitats.
Rooting response of semi-hard cuttings of guava (Pisidium gujava) to various concentrations of different auxins.
Mollusks recovered (Mead, 1991) included four terrestrial gastropods (Deroceras, Succinea, Gastrocopta, and Vertigo), two aquatic snails (Fossaria and Gyraulus), and a fingernail clam (Pisidium).