Syncarida
Encyclopedia
Syncarida is a superorder of crustacean
Crustacean
Crustaceans form a very large group of arthropods, usually treated as a subphylum, which includes such familiar animals as crabs, lobsters, crayfish, shrimp, krill and barnacles. The 50,000 described species range in size from Stygotantulus stocki at , to the Japanese spider crab with a leg span...

s, comprising the two orders
Order (biology)
In scientific classification used in biology, the order is# a taxonomic rank used in the classification of organisms. Other well-known ranks are life, domain, kingdom, phylum, class, family, genus, and species, with order fitting in between class and family...

 Anaspidacea
Anaspidacea
Anaspidacea is an order of crustaceans, comprising eleven genera in four families. Species in the family Anaspididae vary from being strict stygobionts to species living in lakes, streams and moorland pools, and are found only in Tasmania...

 and Bathynellacea
Bathynellacea
Bathynellacea is an order of crustaceans which live interstitially in groundwater. Some species can tolerate low salt concentrations, and at least one African species is a thermophile, living in hot springs and tolerating temperatures up to . Bathynellaceans are minute, blind, worm-like animals...

. Fifty-nine genera are known, in six families:
Anaspidacea
Anaspidacea
Anaspidacea is an order of crustaceans, comprising eleven genera in four families. Species in the family Anaspididae vary from being strict stygobionts to species living in lakes, streams and moorland pools, and are found only in Tasmania...

 Calman, 1904
  • Anaspididae
    Anaspididae
    Anaspididae is a family of freshwater crustacean that is endemic to Tasmania, Australia. The family contains 3 genera and 5 species. This group of crustaceans are considered living fossils. They are commonly and collectively known as the Tasmanian anaspid crustaceans. Anaspidids have stalked eyes,...

     Thomson, 1893
  • Koonungidae Sayce, 1908
  • Psammaspididae Schminke, 1974
  • Stygocarididae Noodt, 1963

Bathynellacea
Bathynellacea
Bathynellacea is an order of crustaceans which live interstitially in groundwater. Some species can tolerate low salt concentrations, and at least one African species is a thermophile, living in hot springs and tolerating temperatures up to . Bathynellaceans are minute, blind, worm-like animals...

 Chappuis, 1915
  • Bathynellidae Grobben, 1904
  • Parabathynellidae Noodt, 1965
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