Cyclopidae


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Cyclopidae

 

a family of crustaceans of the subclass Copepoda. The animals measure 1–5.5 mm in length. They have a single median eye (hence the name). The antennules are short, and the antennas are single-branched and are used for swimming. The abdomen is longer than the cephalothorax. The females have two egg sacs. The heart is absent. The family includes approximately 250 species distributed throughout the world.

Cyclopidae live mostly in freshwater. Benthopelagic or, sometimes, pelagic organisms, the animals are predators that feed on protozoans, rotifers, and small crustaceans. In turn, Cyclopidae serve as food for fish and fry. They are intermediate hosts for parasitic worms, such as the guinea worm and the broad tapeworm.

References in periodicals archive ?
x x Harpacticus uniremis Krayer, 1842 x Parastenocaris brevipes Kessler, 1913 x Mesocyclops leukarti (Claus, 1857) x Cyclopidae juv.
If this hypothesis is true, we predict that we will find mostly members of fast-swimming Cyclopidae and not large, slow-swimming cladocerans in the water samples.
Their perspectives and findings include taxonomic differentiation and world geographical distribution of the Eucyclops serrulatus group, how to reinterpret the internal structures of female genitalia in Cyclopidae, a third genus of parastenocaridid copepods from Australia supported by molecular evidence, limnetic zooplankton of Chilean lakes and reservoirs, diversity and spatial distribution of copepods in the St.
Among Cyclopidae, cosmopolitan forms were dominant (10 species), followed by Neotropical (5), Nearctic (5), and endemic (4) elements (Table 1).