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The Huatabampo tradition was first defined by Gordon Ekholm, in 1938, and refers to those sites in the coastal plain in northern Sinaloa and southern Sonora lacking architecture but containing well-manufactured plain ceramics with complex shapes. Recent investigations in the region are helping to refine the chronology, geographical extension, cultural attributes, and ethnicity. With 20 radiocarbon dates, we can place this tradition as spanning from 200 BC to AD 1450. The maximum geographical extension ranges from the Middle Rio Yaqui in the north to the Rio San Lorenzo in Sinaloa. The associated sites of this complex are represented by dispersed houses, indicative of ranchería-type settlements, funerary mounds, shell middens, and petroglyph sites. At about AD 1150, Aztatlán pottery and other commodities from southern Sinaloa were incorporated mostly as mortuary offerings. We also provide evidence that the Huatabampo archaeological tradition is a local culture representing the occupation of the Cahitan-speaking groups, Yoremem/Mayos and Yoemem/Yaquis, of the coastal plain.