Tumilaca Phase keros, showing diversity of postexpansive local styles, including step-stair motif, third from upper left. Above: "coca-cola" shape keros from Omo M10N5=1, M11 estructura 3 M11=1742, Maria Cupine M9=4, and Chamos M48=1 sites. Below: Banded and nubbed keros, Los Keros site M94=1a and 1b, Omo M11=0, Maria Cupine M9=0, Cerro Echenique M2=522.
Isbell, William H.; Uribe, Mauricio I.; Tiballi, Anne; Edward P. Zegarra, 2018, "Visual database", https://doi.org/10.25346/S6/1B33FN.