Tototlmimus
From Nahuatl tototl ('bird') and Latin mimus ('mimic', from Greek mimos), meaning 'bird mimic'
Late Cretaceous stages
Tototlmimus is an extinct genus of ornithomimid theropod dinosaur from the Late Cretaceous (Campanian) Packard Formation of Sonora, Mexico. Its type species is Tototlmimus packardensis, representing the first ornithomimosaur formally described from this country.
Diagnosis
- Distinctive articulation between metatarsals II and IV contacting directly with the distal facet of metatarsal III
- Metatarsal III with weakly ginglymoid distal articular facet bearing pits and deep longitudinal scars
- Medial and lateral sides of metatarsal III shaped to fit with metatarsals II and IV
- Asymmetrical and narrow pedal ungual with shallow grooves on medial and lateral sides
- Deep sulcus on ventromedial edge close to articular end and prominent keel on ventrolateral edge
Species
Tototlmimus packardensis Serrano-Brañas et al., 2016
Type species
Named for the Packard Formation of Sonora, Mexico, where the holotype was discovered.
- Holotype
- ERNO 8553 , Estación Regional del Noroeste, Universidad Nacional Autónoma de México
- Material
- Fragments of manus and pes including manual phalanges, right metatarsals II-IV, right and left pedal phalanges, and left pedal ungual
- Horizon
- Packard Shale Formation, Campanian, Late Cretaceous , 83.6–72.2 million years ago
- Locality
- 1 km east-southeast of Rancho Corral de Enmedio, Sonora, Mexico
References
- Serrano-Brañas, C. I.; Torres-Rodríguez, E.; Reyes-Luna, P. C.; González-Ramírez, I.; González-León, C. (2016). A new ornithomimid dinosaur from the Upper Cretaceous Packard Shale formation (Cabullona Group) Sonora, México. Cretaceous Research 58: 49-62. Elsevier BV. doi:10.1016/j.cretres.2015.08.013 serrano-brañas2016a
-
Jones, B. (2026). The Princeton Encyclopedia of Dinosaurs: Theropods. Princeton University Press.
Source of the body length, mass, and hip height estimates, and the appearance features.
jones2026c