Canine teeth, bicuspids, and molars all have cusps. Bicuspids typically have two cusps, one on the cheek or buccal side of the tooth, and one on the tongue or lingual side. Although bi is the prefix for two, a bicuspid tooth will sometimes have three cusps, with two on the lingual side.
The mixture of the indigenous, Spanish and African music and sounds have formed very distinctive music styles that are present today. Ecuador is well-known for marimba, a unique form of music that was introduced by the Esmeraldas. It is a direct and virtually unchanged import from the Western Africa region. Marimba is played on a musical instrument of the same name. The instrument features wooden bars tuned to produce a chromatic scale and with resonators, and these bars are played with small mallets. Pasillo, pasacalle and yarabi are also very popular forms of music in Ecuador.
Ecuador has a population of about 1,120,000 descendants from African people. The Afro-Ecuadorian culture is found primarily in the country's northwest coastal region. Africans form a majority (70%) in the province of Esmeraldas and the Valle del Chota in the Imbabura Province. They can be also found in Quito and Guayaquil. Their best known cultural influence known outside of Ecuador is a distinctive kind of marimba music. Beautiful Afro-Ecuadorian girl wearing traditional straw hat According to the book No Longer Invisible: Afro-Latin Americans Today: Regional blackness as a force of self-liberation in Ecuador begins in Esmeraldas, and its origin occurs during a violent tropical storm and a movement of African rebellion.