In biology, a genus / (plural: genera) is a law-level taxonomic rank uised in the biological classification o livin an fossil organisms, which is an example o defineetion bi genus an differentia. Genera an heicher taxonomic levels sic as faimilies are uised in biodiversity studies, parteecularly in fossil studies syne species canna always be confidently identified an genera an faimilies teepically hae langer stratigraphic ranges than species.
The term comes frae the Latin genus meanin "strynd, faimily, type, gender", cognate wi [γένος] error: : text has italic markup (help) – genos, "race, stock, kin".
The composeetion o a genus is determined bi a taxonomist. The staundarts for genus classification are nae strictly codified, sae different authorities eften produce different classifications for genera. In the hierarchy o the binomial classification seestem, genus comes abuin species an belaw faimily.