The Cuban-born, New York-based percussionist and singer Orlando “Puntilla” Rios–known for his virtuosic work with jazzy Latin pop stars like Celia Cruz, Tito Puente, and Eddie Palmieri–comes to town with an unelectrified presentation on the folkloric roots of Afro-Cuban music and dance. The rituals and songs in this show can be traced to a time of cultural upheaval in the Caribbean, when west African lucumi pantheism blended with 16th-century Spanish Christianity to produce a syncretic religion, santeria, that placed the Yoruba orishas, or deities, in a one-to-one correspondence with Christian saints. As the costumed dancers in this program flamboyantly portray the various orishas, Rios and his crew slam up the music essential to santeria rituals; the drumming is as richly polyrhythmic as anything you’ve ever heard, and the singers bring their voices together at distinctively Afro-Cuban, gorgeously odd (to Western ears, at least) harmonic intervals. This. eerie, sensual music sings eloquently of the unseen supematural while simultaneously embracing a frankly hot physicality–which is just what you’d expect from a culture that organically integrates the holy and the sexy instead of forcibly dividing them. Santeria–still widely practiced in Cuba and Puerto Rico as well as in Chicago and other U.S. cities–has as its secular concomitant rumba, a music-dance form often used as a vehicle for political and social commentary; it’s also featured on this program. Field Museum of Natural History, James Simpson Theater, Roosevelt and Lake Shore, 322-8854. Saturday, March 5, 1 PM. $10 (includes museum admission).