Genus: Yaguarasaurus PARAMO, 1994
Etymology: Yaguara, Departamento del Huila, Colombia, in reference to the type locality, and Greek, sauros, "lizard."

Species: columbianus PARAMO, 1994
Etymology: In reference to the country of Colombia.

Holotype: BRV-68

Locality: El Ocal stream in Quebrada El Ocal, 26 km southwest of Neiva, Municipio de Yaguara, Departamento del Huila, Colombia.

Horizon: Villeta Formation, Unit “La Frontera”.

Biostratigraphy:

Age: Upper Turonian Stage, Uppermost Gallic Subepoch, Lower Gulf Epoch, Late Cretaceous.

Material: Nearly complete skull and dentary, atlas, axis, first cervical, 2 dorsal vertebrae and a few ribs.

Yaguarasaurus columbianus after PARAMO, 1994: A) dorsal and B) ventral views.

Referred material:

PARAMO-FONSECA, 2001

Locality: From the same stream as the type, El Ocal, but 6 meters higher in the section, Quebrada El Ocal, 26 km southwest of Neiva, Municipio de Yaguara, Departamento del Huila, Colombia.

Horizon: Villeta Formation, Unit “La Frontera”.

Biostratigraphy:

Age: Upper Turonian Stage, Uppermost Gallic Subepoch, Lower Gulf Epoch, Late Cretaceous.

Material:

MP-1: Frontal, angular and fragment of a vertebra.

 


Locality: About a kilometer south of the type site, at La Palmer Farm, Quebrada El Ocal, Municipio de Yaguara, Departamento del Huila, Colombia.

Horizon: Villeta Formation, Unit “La Frontera”.

Biostratigraphy:

Age: Upper Turonian Stage, Uppermost Gallic Subepoch, Lower Gulf Epoch, Late Cretaceous.

Material:

MP-2: An isolated tooth.

 

Locality: Itaibe stream, 78 km to the southwest from Neiva, Municipio de Yaguara, Departamento del Huila, Colombia.

Horizon: Villeta Formation, Unit “La Frontera”/

Biostratigraphy:

Age: Upper Turonian Stage, Uppermost Gallic Subepoch, Lower Gulf Epoch, Late Cretaceous.

Material:

MP-14: Skull and associated cervical vertebrae.

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Species: regiomontanus RIVERA-SYLVA, LONGRICH, PADILLA-GUTIERRE, TUZMAN-GUTIERREZ, ESCALANTE-HERNANDEZ & GONZALEZ-AVILA, 2023
Etymology: = of the demonym regiomontano, from Monterrey, Nuevo Leon State, nearest city where the fossil was found.

Holotype: CPC 2972

Locality: 2 km northwest of the town of Vallecillo, Municipality of Vallecillo, Nuevo Leon State, Mexico.

Horizon: Upper Member, Agua nueva Formation.

Biostratigraphy:

Age: Upper Turonian Stage, Uppermost Gallic Subepoch, Lower Gulf Epoch, Late Cretaceous.

Material: Skull missing the anterior rostrum and part of the right side.

Yaguarasaurus giomontanus after RIVERA-SYLVA, LONGRICH, PADILLA-GUTIERRE, TUZMAN-GUTIERREZ, ESCALANTE-HERNANDEZ & GONZALEZ-AVILA, 2023: A) reconstruction of the skull and B) as pereserved.