Tlaltecuhtli is the Earth Goddess.
Tlaltecuhtli is closely associated with Tonatiuh, the sun or Sun God .
She is called by midwives when the difficult birth of an infant threatens the life of its mother.
After Quetzalcoatl and Tezcatlipoca had created large cosmic trees to seperate the skies from the waters, they needed to create a solid place to for creatures to dwell on. Within the primordial waters swam a huge cayman-like monster named Tlaltecuhtli.
The two gods decided to destroy here for the sake of the re-creation of the world. Tezcatlipoca used his foot as bait to catch her. Tlaltecuhtli came up to bite it off. In the fight that followed, Tezcatlipoca lost his foot, but Tlaltecuhtli lost her lower jaw. Without it, she could no longer sink below the surface of the waters. Now the gods created the Earth upon her back. Of her hair they made trees, flowers and grasses, of her eyes wells, fountains and little caverns, of her nose valleys, and of her shoulders mountains.
Sometimes at night, the goddess can still be heard crying for the pains she is suffering. Only the sacrifice of blood gives her some consolation.
Tlaltecuhtli is the Lord of the Day for days with number 2 ("ome" in Nahuatl).