[CP]
South American farming cultures found in the Rio Ucayali area of Amazonia and tentatively dated to c.200–1 bc. Characterized by their ceramic assemblages which belong to the Incised Rim Horizon Style of the Amazon basin. At the site of Yarinachocha, Peru, incised rim and plastic ornament decoration are found together in the Hupa-Iya Phase, in association with the first tangible evidence for bitter manioc processing. Spindle-whorls also appear in the archaeological record at this time.
