Bacabs

Bacab is the generic Yucatec name for each of the four aged deities of the interior of the earth and its water deposits. Seated in a turtle carapace or a conch, he is often represented in ancient Mayan art.
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[Mayan] In Mayan mythology, a group of four protective deities, the sons of Itzamna and Ixchel. They are giants who uphold the sky at its cardinal points. The Bacabs are: Cauac, Ix, Kan, and Mulac.