Ethusidae is one of two

extant Extant is the opposite of the word extinct. It may refer to: * Extant hereditary titles * Extant literature, surviving literature, such as ''Beowulf'', the oldest extant manuscript written in English * Extant taxon, a taxon which is not extinct, ...

families of

crab Crabs are decapod crustaceans of the infraorder Brachyura, which typically have a very short projecting "tail" (abdomen) ( el, βραχύς , translit=brachys = short, / = tail), usually hidden entirely under the thorax. They live in all the ...

s in the superfamily

Dorippoidea Dorippoidea is a superfamily of crabs. The earliest fossils attributable to the Dorippoidea date from the Late Cretaceous The Late Cretaceous (100.5–66 Ma) is the younger of two epochs into which the Cretaceous Period is divided in the ge ...

. It contains four

genera Genus ( plural genera ) is a taxonomic rank used in the biological classification of living and fossil organisms as well as viruses. In the hierarchy of biological classification, genus comes above species and below family. In binomial nomenclat ...

. Members of this family are found in marine environments at depths from 16m to 4,192m.EOL.org
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Genera

*''

Ethusa ''Ethusa'' is a genus of crabs in the family Ethusidae Ethusidae is one of two extant families of crabs in the superfamily Dorippoidea. It contains four genera. Members of this family are found in marine environments at depths from 16m to ...

'' Roux, 1830 *'' Ethusina'' Smith, 1884 *'' Parethusa'' Chen, 1997 *'' Serpenthusa'' Naruse, Castro & Ng, 2009

References

*Ng, Guinot & Davie (2008). ''Systema Brachyurorum: Part I. An annotated checklist of extant brachyuran crabs of the world.'' Raffles Bulletin of Zoology Supplement, n. 17 . Crabs Decapod families {{crab-stub