Rumba is both a family of music rhythms and a dance style that originated in Africa and traveled via the slave trade to Cuba and the New World. The so-called rumba rhythm, a variation of the African standard pattern or clave rhythm, is the additive grouping of an eight pulse bar (one 4/4 measure) into 3+3+2 or, less often, 3+5 (van der Merwe 1989, p.321). Its variants include the bossa nova rhythm. Original Cuban rumba is highly polyrhythmic, and as such is often far more complex than the examples cited above.