''Staianus'' is a monotypicgenus of Malagasy huntsman spiders containing the single species, ''Staianus acuminatus''. It was first described by
Eugène Louis Simon
Eugene is a common male given name that comes from the Greek εὐγενής (''eugenēs''), "noble", literally "well-born", from εὖ (''eu''), "well" and γένος (''genos''), "race, stock, kin".Madagascar.