The Chantuto were the ancient people who belonged to the coastal region of Southwestern Mexico, west of the modern town of Escuintla, Chiapas, dating back to between 5500-1500 BC (7500-3500 before present).
These sites were described as round or oval in shape, containing various amounts of clam shells, which most likely where stored here by the Chantuto people (Voorhies 2003).
But according to John E. Clark, these were basically the same group of people, most likely speakers of proto-Mixe-Zoque, so he proposed the single term Mokaya to refer to them.
[4] At the site of Tlachuachero, out of 17 samples taken from this stratum, such objects as bone, ceramics, shell, rock fragments and clay nodules arose.
The collection results from this site outlined that 99.55% of the total weight of the samples were made up of clam shells with the remainder as other items, such as fish bone for example.