Animalia genera

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	Genus	ranks
	Ocrepeira Ocrepeira	None
	Odontota Chevrolat in Dejean	tribe Chalepini None
	Oleria Hübner	tribe Ithomiini None
	Oophaga Bauer	None
	Opaon Kirby,	None
	Ophiderma Fairmaire	None
	Opisthopatus Purcell	None
	Orcaella Gray	None
	Organopoda Hampson	tribe Rhodostrophiini None
	Oryctopterus Karny	tribe Oryctopterini None
	Oryctopus Brunner von Wattenwyl	tribe Oryctopini None
	Ostracion Linnaeus	None
	Othorene Boisduval	None
	Oulema Des Gozis	tribe Lemini None
	Ouleus Lindsey	tribe Achlyodidini None
	Oxybelis Wagler	None
	Oxynetra C. & R. Felder	None