isopod


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isopod

(ī`səpŏd'), common name for crustaceans belonging to the order Isopoda and in the same subclass as lobsters and crayfish. Isopods are characterized by their flattened bodies, lack of a carapace, and gills located on the abdominal appendages. About 4,000 species are known. Most are aquatic; they are bottom-dwellers or are associated with water plants in freshwater or marine habitats. Some live under rocks on the shore, and some are terrestrial, living inconspicuously in surface litter or under logs. These, the pill bugs, or sow bugs, are the only large group of terrestrial crustaceans. Some isopods roll up like armadillos when disturbed. Some are parasitic, living on other crustaceans or in the mouths or on the gills of fishes. Most isopods are small, less than 1-2 in. (1.27 cm) long, but Bathynomus gigantea, a deep-sea species, may be over 1 ft (30 cm) long. Isopods are classified in the phylum ArthropodaArthropoda
[Gr.,=jointed feet], largest and most diverse animal phylum. The arthropods include crustaceans, insects, centipedes, millipedes, spiders, scorpions, and the extinct trilobites.
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, subphylum Crustacea, order Isopoda.
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References in periodicals archive ?
The isopods found in the present study were previously reported by Dexter (1974) as Cirolana salvadorensis (Glynn, et al., 1975).
[23.] Rivichandran S, Rameshkumar G, Kumarave K (2009) Variation in the Morphological Features of Isopod Fish Parasites.
sp., a new bopyrid isopod parasitic on the mud shrimp, Upogebia dawsoni Williams (Thalassinidea), from the Gulf of California.
Endemics and immigrants: North American terrestrial isopods (Isopoda, Oniscidea) north of Mexico.
Swimming ability and burrowing time of two cirolanid isopods from different levels of exposed sandy beaches.
In this study, we recorded, for the first time, acoustical behavior in aquatic isopod crustaceans.
In 2007, 17 bands contributed to an album Songs About Giant Isopods. But it was never released.
Toxicity of abamectin to the terrestrial isopod Porcellio scaber (Isopoda, Crustacea) Ecotoxicology 19: 917927.