some seem centralid, others margid; some mixed between these types and subtypes of each (Sonorid, Margid, Pueblid, Centralid, Isthmid) They are not uniform, just because centralid, isthmid etc are commonly associated with Mayan people, not all Mayans are just centralid and nothing else. Some are pure Centralids, others are Margids, and a lot of them are mixed Centralid-Margid. Just like how you can find Pueblids, Margids, Silvids or Pacifids among Great Plains Tribes. Also curly hairs are not unheard of among natives and can occur in some of these populations.
Compare to these who are pure or almost pure Maya Centralid Types
And here some Margids from various Tribes