Genus: Xenovenator RIVERA-SYLVA, AGUILLO-MARTINEZ, FLORES-VENTURA, SANCHEZ-URIBE, GUZMAN-GUITERREZ & LONGRICH, 2026
Etymology: Greek, xenos, "strange," and Latin, venator, “hunter”; Strange hunter.

Species: robustus (SULLIVAN, 2006) RIVERA-SYLVA, AGUILLO-MARTINEZ, FLORES-VENTURA, SANCHEZ-URIBE, GUZMAN-GUITERREZ & LONGRICH, 2026
= Saurornitholestes robustus SULLIVAN, 2006
Etymology: Latin, robusutus, "robust or strong."

Holotype: SMP VP-1955

Locality: SMP Loc. no. 388 (Alamo Wash [North Fork]), San Juan Basin, New Mexico.

Horizon: De-na-zin Member, Kirtland Formation.

Biostratigraphy:

Age: Late Kirtlandian age, Upper Campanian Stage, Senonian Subepoch, Gulf Epoch, Late Cretaceous.

Material: Nearly complete frontal.

Referred material:

= Cf. Saurornitholestes robustus

Locality: SMP Loc. no. 350, San Juan Basin, New Mexico.

Horizon: De-na-zin Member, Kirtland Formation.

Biostratigraphy:

Age: Late Kirtlandian age, Upper Campanian Stage, Senonian Subepoch, Gulf Epoch, Late Cretaceous.

Material:

SMP VP-1901: Tooth.

 

Locality: SMP Loc. no. 361, San Juan Basin, New Mexico.

Horizon: De-na-zin Member, Kirtland Formation.

Biostratigraphy:

Age: Late Kirtlandian age, Upper Campanian Stage, Senonian Subepoch, Gulf Epoch, Late Cretaceous.

Material:

SMP VP-1741: Fragmentary left pedal ungual.

_____________________________________________________________________________________

Species: espinosai RIVERA-SYLVA, AGUILLO-MARTINEZ, FLORES-VENTURA, SANCHEZ-URIBE, GUZMAN-GUITERREZ & LONGRICH, 2026
Etymology: In honor of Luis Espinosa, a pioneer in the study of Mexican dinosaurs and mentor to many generations of paleontologists.
= Troodontidae incertae sedis AGUILLON-MARTINEX, & RIVERA-SYLVA, 2023

Holotype: CPC 2973

Locality: La Parrita Locality, 54 km west of Saltillo, Municipality of Genral Cepeda, Coahuila State, Mexico.

Horizon: Cerro Del Puebelo Formation, Lower Difunta Group.

Biostratigraphy:

Age: Uppermost/latest Campanian Stage, Senonian Subepoch, Gulf Epoch, Late Cretaceous.

Material: Braincase including frontals, parietals, orbitosphenoids, laterosphenoids, exoccipitals, prootics, basisphenoid and basioccipital.

Referred material:

CPC 3112: Right frontal.

 

Locality: Ejido Trincheras locality, 109 km west of Salitillo, Municipality of Parras de la Fuente, Coahuila State, Mexico.

Horizon: Cerro Del Puebelo Formation, Lower Difunta Group.

Biostratigraphy:

Age: Uppermost/latest Campanian Stage, Senonian Subepoch, Gulf Epoch, Late Cretaceous.

Material:

CPC 2976: Left frontal.