Dineobellator
Dineobellator notohesperus was a dromaeosaurid theropod dinosaur that lived in North America during the Late Cretaceous period. Known from a partial skeleton discovered in New Mexico, this dinosaur possessed unique anatomical features suggesting enhanced agility and gripping strength, possibly aiding in predation. Its presence indicates that dromaeosaurs remained active predators, occupying specific ecological niches even alongside larger theropods like Tyrannosaurus.
Key Facts
- ›Dineobellator lived in the Late Cretaceous period, specifically the Maastrichtian age.
- ›Fossils were discovered in the Ojo Alamo Formation of New Mexico, United States.
- ›The name 'Dineobellator' means 'Diné warrior', honoring the Navajo Nation.
- ›It was a dromaeosaurid theropod, likely feathered, with enhanced hand and foot flexion.
- ›Evidence suggests it had strong grip strength in its manual unguals.
- ›Its habitat was a lush floodplain with wetlands and riparian forests.
- Estimated to be about the size of Deinonychus.
- Possessed unique features for greater hand and foot flexion.
- Showed tighter grip strength in manual unguals.
- Had greater movement at the tail base.
- Evidence of quill knobs on the ulna suggests it was feathered.
Velociraptor, Saurornitholestes, Deinonychus
North America
About Dineobellator
Dineobellator notohesperus is a genus of dromaeosaurid theropod dinosaur known from a partial skeleton discovered in New Mexico, United States. This dinosaur roamed the Earth during the Late Cretaceous period, specifically the Maastrichtian age, as part of the Ojo Alamo Formation fauna.
Discovery and Naming
The remains of Dineobellator were first recovered in 2008, with additional material collected in subsequent years. The genus and species were formally named and described in 2020 by Jasinski, Sullivan, and Peter Dodson. The genus name, "Dineobellator," translates to "Diné warrior," honoring the Navajo Nation, while the species name, "notohesperus," refers to the "southwest" region where it was found.
Physical Characteristics and Paleobiology
Dineobellator was classified as a dromaeosaur and, based on reexaminations of its holotype, is estimated to have been about the size of Deinonychus. Unique skeletal features suggest it possessed greater hand and foot flexion, stronger grip strength in its manual unguals, and more movement at the tail base, all of which may have contributed to its agility and predatory capabilities. The presence of quill knobs on its ulna provides strong evidence that, like other dromaeosaurids, it was feathered. Paleobiological evidence from the type specimen indicates potential interactions with other theropods, including a claw gouge on one of its hand claws consistent with those of a similarly-sized theropod, and a healed rib fracture, suggesting resilience.
Palaeoenvironment
This dinosaur inhabited southern Laramidia, a landmass that existed during the Cretaceous. The environment was a lush floodplain characterized by wetlands and riparian gymnosperm forests. Dineobellator shared its ecosystem with a diverse array of large dinosaurs, including ceratopsians like Ojoceratops and Torosaurus, hadrosaurs such as Edmontosaurus and Kritosaurus, ankylosaurs like Glyptodontopelta, and the titanosaur Alamosaurus. It also coexisted with apex predators like the azhdarchid pterosaur Quetzalcoatlus and Tyrannosaurus, as well as other smaller theropods. The presence of Dineobellator suggests that dromaeosaurs maintained active predatory roles and occupied distinct ecological niches even in the presence of large tyrannosaurs and other formidable carnivores. Its prey likely included the smaller fauna of the region, such as mammals, turtles, and fish.
Source: Wikipedia ↗
Frequently Asked Questions
What does the name Dineobellator mean?
The genus name Dineobellator is derived from 'Diné', the Navajo word for the people of the Navajo Nation, and 'bellator', the Latin word for warrior. Thus, it means 'Diné warrior'.
When did Dineobellator live?
Dineobellator lived during the Late Cretaceous period, specifically the Maastrichtian age. This places it among the last non-avian dinosaurs to exist before the Cretaceous-Paleogene extinction event.
Where were the fossils of Dineobellator found?
The holotype remains of Dineobellator were discovered in the Ojo Alamo Formation, in the Naashoibito Member, located in New Mexico, United States. This region was part of Laramidia during the Late Cretaceous.
What were the physical characteristics of Dineobellator?
Dineobellator was a dromaeosaur about the size of Deinonychus. Unique features suggest greater hand and foot flexion, stronger grip strength in its manual unguals, and increased tail base movement, possibly aiding in agility and predation. Quill knobs on its ulna indicate it was feathered.
What kind of environment did Dineobellator inhabit?
Dineobellator inhabited a palaeoenvironment in southern Laramidia characterized as a lush floodplain dominated by wetlands and riparian gymnosperm forests. It coexisted with a variety of other dinosaurs and smaller fauna.
What did Dineobellator eat?
As a dromaeosaurid theropod, Dineobellator was a carnivore. Its diet likely included smaller animals such as mammals, turtles, and fish that inhabited its environment, and it was an active predator.
Related Dinosaur species
Alamosaurus
Alamosaurus sanjuanensis was a gigantic titanosaurian sauropod that lived in southwestern North America during the Late Cretaceous period. It is notable as one of the few sauropods to inhabit North America after a significant absence in the fossil record and likely immigrated from South America or Asia. Alamosaurus was a quadrupedal herbivore characterized by a long neck, long tail, and bony armor, reaching impressive sizes comparable to some of the largest known dinosaurs.
Bisticeratops
Bisticeratops is a genus of chasmosaurine ceratopsian dinosaur that lived during the late Campanian age of the Late Cretaceous period. Its fossils have been discovered in the Kirtland Formation of northwestern New Mexico, United States. The genus is known from a nearly complete skull, which displays evidence of healed tyrannosaurid bite marks.
Ahshislesaurus
Ahshislesaurus is an extinct genus of saurolophine hadrosaurid dinosaur that lived during the Late Cretaceous period in what is now New Mexico, United States. Known from a partial skull and neck vertebrae, it is distinguished by a uniquely deep mandible and a small bump over its snout, lacking the elaborate crests of some relatives. The genus and species, Ahshislesaurus wimani, were formally described in 2025.