Cercopagididae is a family of

crustacean Crustaceans (from Latin meaning: "those with shells" or "crusted ones") are invertebrate animals that constitute one group of arthropods that are traditionally a part of the subphylum Crustacea (), a large, diverse group of mainly aquatic arthrop ...

s belonging to the order

Diplostraca The Diplostraca or Cladocera, commonly known as water fleas, is a superorder of small, mostly freshwater crustaceans, most of which feed on microscopic chunks of organic matter, though some forms are predatory. Over 1000 species have been recogn ...

. A lot of Cercopagididae species are

non-native species An introduced species, alien species, exotic species, adventive species, immigrant species, foreign species, non-indigenous species, or non-native species is a species living outside its native distributional range, but which has arrived ther ...

, many of which pose a great threat to aquatic ecosystems. Genera: * '' Bythotrephes'' Leydig, 1860 (e.g. ''

Bythotrephes longimanus ''Bythotrephes longimanus'' (also ''Bythotrephes cederstroemi''), or the spiny water flea, is a planktonic crustacean less than long. It is native to fresh waters of Northern Europe and Asia, but has been accidentally introduced and widely distr ...

'') * '' Cercopagis'' Sars, 1897 (e.g. '' Cercopagis pengoi'') In addition, * '' Apagis'' Sars, 1897 is sometimes treated as a genus rather than as a subgenus, ''Cercopagis'' (''Apagis'').

References

Diplostraca Crustacean families {{branchiopoda-stub