Thylacosmilus atrox Riggs, 1933

Suarez, Catalina, Forasiepi, Analia M., Babot, María Judith, Shinmura, Tatsuya, Luque, Javier, Vanegas, Rubén D., Cadena, Edwin A. & Goin, Francisco J., 2023, A sabre-tooth predator from the Neotropics: Cranial morphology of Anachlysictis gracilis Goin, 1997 (Metatheria, Thylacosmilidae), based on new specimens from La Venta (Middle Miocene, Colombia), Geodiversitas 45 (18), pp. 497-572 : 544

Thylacosmilus atrox Riggs, 1933

FMNH P14531 (holotype), nearly complete skull ( Chiquimil locality, Catamarca Province, Argentina; Corral Quemado Formation, Chapadmalalan Stage/Age, late Pliocene ; FMNH P143344 (paratype): left mandibular ramus with dentition ( Chiquimil locality, Catamarca Province, Argentina; Andagala Formation, Huayquerian Stage/Age, late Miocene) ; MLP 65-VII-29-41 , partial skull, partial right mandibular ramus with dentition and a fragment of the right upper canine isolated ( Salinas Grandes de Hidalgo , La Pampa Province, Argentina; Cerro Azul Formation, Huayquerian Stage/Age, late Miocene) .

Additional information: Riggs (1934); Goin & Pascual (1987); Forasiepi et al. (2019).

Comment: The FMNH specimens were revised in photographs provided by A. Forasiepi.