The Ctenopoda are an

order Order, ORDER or Orders may refer to: * Categorization, the process in which ideas and objects are recognized, differentiated, and understood * Heterarchy, a system of organization wherein the elements have the potential to be ranked a number of ...

of the superorder

Diplostraca The Diplostraca or Cladocera, commonly known as water fleas, are a superorder of small crustaceans that feed on microscopic chunks of organic matter (excluding some predatory forms). Over 1000 species have been recognised so far, with many more ...

, comprising the three families

Holopediidae ''Holopedium'' is the sole genus of water fleas in the family Holopediidae. There are about seven described species in ''Holopedium''. Species These seven species belong to the genus ''Holopedium'': * ''Holopedium acidophilum'' Rowe, Adamowicz ...

Pseudopenilidae ''Pseudopenilia bathyalis'' is a species of diplostracan, described in 2004, that lives at depths of in the anoxic zone of the Black Sea. Originally described in the family Sididae Sididae is a family of ctenopods in the order Diplostraca. The ...

, and

Sididae Sididae is a family of ctenopods in the order Diplostraca. There are about 6 genera and at least 20 described species in Sididae. Genera * ''Diaphanosoma'' Fischer, 1850 * ''Latona'' Straus, 1820 * ''Latonopsis'' G. O. Sars, 1888 * ''Penilia'' Da ...

. Its members mostly live in

fresh water Fresh water or freshwater is any naturally occurring liquid or frozen water containing low concentrations of dissolved salts and other total dissolved solids. Although the term specifically excludes seawater and brackish water, it does incl ...

, but ''

Penilia ''Penilia'' is a genus of ctenopods in the family Sididae Sididae is a family of ctenopods in the order Diplostraca. There are about 6 genera and at least 20 described species in Sididae. Genera * ''Diaphanosoma'' Fischer, 1850 * ''Latona'' St ...

'' is marine.

References

External links

* Arthropod suborders Cladocera {{Branchiopoda-stub