In a random sample of 64 people from a general population, the expected number of identical twin pairs present in the same group would be close to zero.

The presence of two pairs — representing four of the 64 individuals — indicates something about how the individuals in this chultún were selected.

Were twins specifically chosen for ritual deposition because of their identity as twins?

The Maya world, at Chichén Itzá and more broadly, was one in which the concept of twinhood carried specific cosmological weight.

The Hero Twins of the Popol Vuh are perhaps the most famous expression of this, but twin symbolism appears in Maya art and epigraphy in other contexts as well.

In a society that invested deep meaning in twinhood — that understood twins as a specific kind of person, with specific relationships to the supernatural world — the selection of twins for a ritual context that may have been linked to underworld symbolism would not be surprising.