South American cultural grouping found in the Rio Ucayali area of Amazonia in the period c.2000–1500 bc. Defined by its ceramics which belong to the Zoned Hachure Horizon Style. Pots of this phase often have complicated profiles with body flanges with step‐fret, rectilinear, and curvilinear scroll design decoration. Simple geometric designs incised into the surface of the vessel are also common. Evidence of sweet manioc production is often associated with sites of this phase.