Genus: Nusaviichthys ALVARADO-ORTEGA & ALVES, 2022
Etymology: Nusavi refers to the orignal name of the Mixtec people, which in thier language is 'Nuu dzhaui' or 'Nuu savi' and means "the people of teh rain." The combination of this word and Greek, ichthyes, "fish": fish of the people of the rain.

Species: nerivelai ALVARADO-ORTEGA & ALVES, 2022
Etymology: In honor of the first Mexican astronaut, Dr. Rodolfo Neri Vela. Together the generic and specific names mean "The Neri Vela's fish of the people of teh rain."

Holotype: IGM 12995

Locality: IGM-locality 2772, Tlayua Quarry, 2 km southeast of the Colonia Morelos, near Tepexi de Rodriguez, Puebla State, Mexico.

Horizon: Middle member of the Tlayua Formation.

Biostratigraphy:

Age: Middle or Late Albian Stage, Middle Gallic Subepoch, Uppermost Early Cretaceous Epoch, Early Cretaceous.

Material: Nearly complete specimen.

Paratypes:

Locality: IGM-locality 1970, Z-W, Tlayua Quarry, 2 km southeast of the Colonia Morelos, near Tepexi de Rodriguez, Puebla State, Mexico.

Horizon: Middle member of the Tlayua Formation.

Biostratigraphy:

Age: Middle or Late Albian Stage, Middle Gallic Subepoch, Uppermost Early Cretaceous Epoch, Early Cretaceous.

Material:

IGM 12996: Nearly complete specimen.

Locality: IGM-locality 3661, unnown level, Tlayua Quarry, 2 km southeast of the Colonia Morelos, near Tepexi de Rodriguez, Puebla State, Mexico.

Horizon: Middle member of the Tlayua Formation.

Biostratigraphy:

Age: Middle or Late Albian Stage, Middle Gallic Subepoch, Uppermost Early Cretaceous Epoch, Early Cretaceous.

Material:

IGM 12997: Nearly complete specimen.

Locality: IGM-locality 2828, Z-XVIII, Tlayua Quarry, 2 km southeast of the Colonia Morelos, near Tepexi de Rodriguez, Puebla State, Mexico.

Horizon: Middle member of the Tlayua Formation.

Biostratigraphy:

Age: Middle or Late Albian Stage, Middle Gallic Subepoch, Uppermost Early Cretaceous Epoch, Early Cretaceous.

Material:

IGM 12998: Nearly complete specimen.

Locality: IGM-locality 1995, Z-I, Tlayua Quarry, 2 km southeast of the Colonia Morelos, near Tepexi de Rodriguez, Puebla State, Mexico.

Horizon: Middle member of the Tlayua Formation.

Biostratigraphy:

Age: Middle or Late Albian Stage, Middle Gallic Subepoch, Uppermost Early Cretaceous Epoch, Early Cretaceous.

Material:

IGM 12999: Nearly complete specimen.

Locality: IGM-locality 2828, Z-XIV, Tlayua Quarry, 2 km southeast of the Colonia Morelos, near Tepexi de Rodriguez, Puebla State, Mexico.

Horizon: Middle member of the Tlayua Formation.

Biostratigraphy:

Age: Middle or Late Albian Stage, Middle Gallic Subepoch, Uppermost Early Cretaceous Epoch, Early Cretaceous.

Material:

IGM 13000: Nearly complete specimen.

Locality: IGM-locality 370, unknown level, Tlayua Quarry, 2 km southeast of the Colonia Morelos, near Tepexi de Rodriguez, Puebla State, Mexico.

Horizon: Middle member of the Tlayua Formation.

Biostratigraphy:

Age: Middle or Late Albian Stage, Middle Gallic Subepoch, Uppermost Early Cretaceous Epoch, Early Cretaceous.

Material:

IGM 13001: Nearly complete specimen.

Locality: IGM-locality 2828, Z-XIII, Tlayua Quarry, 2 km southeast of the Colonia Morelos, near Tepexi de Rodriguez, Puebla State, Mexico.

Horizon: Middle member of the Tlayua Formation.

Biostratigraphy:

Age: Middle or Late Albian Stage, Middle Gallic Subepoch, Uppermost Early Cretaceous Epoch, Early Cretaceous.

Material:

IGM 13002: Nearly complete specimen.