Modern physical anthropology is far more careful about the relationship between morphological characteristics and population identity, and the genetics field has demonstrated that populations can show similar skull morphologies while being genetically quite distant, and vice versa.

The elongated skull proportions observed in some of the Checua individuals do not indicate a separate species, a different biological origin, or unusual biology.

They reflect the normal variation in skull morphology that exists across human populations.

The researchers who described this characteristic were observing a physical feature that distinguishes the Checua population from later Altiplano populations in that specific morphological dimension.

This observation is consistent with the genetic finding of distinctiveness, but it does not add independent evidence of any specific ancestry or origin.