Wikipedia
The Concheros dance, also known as the Chichimecas, Aztecas and Mexicas, is an important traditional dance and ceremony which has been performed in Mexico since early in the colonial period. It presents syncretic features both pre-Hispanic and Christian. The dance has strong visual markers of its pre-Hispanic roots with feathered regalia, indigenous dance steps and indigenous instruments such as drums. However, the name Concheros comes from a type of lute made with an armadillo shell, showing Spanish influence. The dance in its current form was the adaptation of the old “mitote” dance to Catholicism as a means of preserving some aspects of indigenous rite. It remained a purely religious ceremony until the mid 20th century when political and social changes in Mexico also gave it cultural significance as a folk dance. Since the later 20th century, a sub group of the dance called Aztecas or Mexicas has emerged with the aim of eliminating the European influence, often with political aims. This form of the dance migrated to the United States in the mid-1970s and can be seen in states such as California in Mexican American communities.