Daemonosaurus
Daemonosaurus is an extinct genus of dinosaur from the Late Triassic period, known from a single skull and neck fossil discovered in New Mexico. It possessed an unusual short skull with large, fang-like teeth, and its exact placement within dinosaur phylogeny is debated, possibly representing a basal theropod or basal saurischian.
Key Facts
- ›Known from a single fossil specimen comprising a skull and neck fragments.
- ›Lived in the Late Triassic period in what is now New Mexico.
- ›Characterized by a short, deep skull and large, prominent teeth.
- ›Its exact classification is debated, potentially a basal theropod or basal saurischian.
- ›Estimated to be relatively small, around 1.5 to 2.2 meters in length.
- ›Found in deposits of the Chinle Formation at Ghost Ranch, a site also rich in Coelophysis fossils.
Short, Deep Skull, Large, Fang-Like Teeth, Rounded Orbit, Relatively Small Antorbital Fenestra, Estimated Length of 1.5-2.2 Meters, Estimated Weight of 9.1–22.7 Kilograms
Tawa Hallae, Herrerasaurus, Eoraptor Lunensis, Coelophysis Bauri, Chindesaurus Bryansmalli
North America
About Daemonosaurus
Daemonosaurus is an extinct genus of dinosaur that lived during the Late Triassic period, approximately 200 million years ago. Known from a single fossil specimen discovered in New Mexico, it presents a unique combination of primitive and derived features, making its exact taxonomic placement a subject of ongoing scientific discussion. Its unusual appearance and position in the dinosaur evolutionary tree make it a significant find for understanding early dinosaur diversification.
Discovery and Classification
The sole known fossil of Daemonosaurus, the holotype CM 76821, consists of a skull, jaw fragments, and several neck vertebrae. It was unearthed from the Chinle Formation at Ghost Ranch, New Mexico, a site renowned for its rich fossil deposits, particularly of the early theropod dinosaur Coelophysis. The genus and species, Daemonosaurus chauliodus, were formally described in 2011 by Hans-Dieter Sues and colleagues. The name 'Daemonosaurus' translates to 'demon lizard,' referencing its fearsome appearance, while 'chauliodus' means 'prominent toothed,' highlighting its distinctive dentition.
Daemonosaurus is generally considered a basal theropod dinosaur, meaning it belongs to an early lineage in the theropod evolutionary tree, likely lying outside the clade Neotheropoda. However, it retains several primitive traits, leading some researchers to classify it as a non-theropod basal saurischian, possibly allied with other early predatory dinosaurs such as herrerasaurids or Tawa. Its precise relationship to other early dinosaurs, including Eoraptor and Herrerasaurus, has been explored through various phylogenetic analyses, with some studies suggesting it could even be an early ornithischian or a member of a clade with Tawa and Chindesaurus.
Physical Characteristics and Paleoenvironment
Daemonosaurus is distinguished by its remarkably short and deep skull, featuring large, fang-like teeth. The orbit, or eye socket, was rounded, and the antorbital fenestra (an opening in the skull in front of the eye) was relatively small. Estimates based on proportions of related theropods suggest Daemonosaurus was around 1.5 to 2.2 meters (5 to 7 feet) in length, with a weight comparable to that of a beaver, approximately 9.1 to 22.7 kilograms (20 to 50 pounds). These estimates are largely speculative due to the preservation of only cranial and cervical material.
The discovery site in New Mexico indicates that Daemonosaurus inhabited a warm, equatorial region with a monsoon-like climate characterized by heavy seasonal rainfall. The paleoenvironment was diverse, featuring various archosauriforms, including phytosaurs, crocodylomorphs, and other dinosaurs like Coelophysis. The deposition of the Daemonosaurus specimen alongside numerous Coelophysis fossils suggests that a flash flood event likely washed these animals into a pond, where they subsequently drowned and were buried by sediment.
Source: Wikipedia ↗
Frequently Asked Questions
What does the name Daemonosaurus mean?
The genus name Daemonosaurus is derived from the Greek words 'daimon' meaning 'demon' and 'sauros' meaning 'reptile'. The species name, chauliodus, comes from the Greek 'chauliodous' meaning 'prominent toothed', referring to its large teeth.
Where was Daemonosaurus discovered?
The only known fossil of Daemonosaurus was discovered at Ghost Ranch in New Mexico, within deposits of the Chinle Formation. This site is also famous for its abundance of Coelophysis fossils.
What did Daemonosaurus look like?
Daemonosaurus had a notably short and deep skull with large, fang-like teeth. It also had a rounded eye socket and a relatively small opening in front of the eye. Estimates suggest it was a small dinosaur, perhaps around 1.5 to 2.2 meters long.
What is Daemonosaurus's diet?
Based on its large, prominent teeth and its classification as a basal theropod or basal saurischian, Daemonosaurus was likely a carnivore, preying on smaller animals.
How does Daemonosaurus relate to other dinosaurs?
Daemonosaurus is considered a basal theropod, meaning it was an early form of theropod that predates more advanced groups like Neotheropoda. It may have been closely related to other early predatory dinosaurs like herrerasaurids or Tawa.
What period did Daemonosaurus live in?
Daemonosaurus lived during the Late Triassic period, specifically in the Rhaetian or possibly latest Norian stages. This was approximately 200 million years ago.
Was Daemonosaurus a common dinosaur?
No, Daemonosaurus is known from only a single fossil specimen, indicating it was likely not a common dinosaur. It lived alongside more abundant early theropods like Coelophysis.
Related Dinosaur species
Bistahieversor
Bistahieversor, meaning "Bistahi destroyer," is a genus of eutyrannosaurian theropod dinosaur that lived in what is now New Mexico during the Late Cretaceous period, approximately 75.5 to 74.5 million years ago. This dinosaur, also known as the "Bisti Beast," was a formidable predator, closely related to tyrannosaurids, and possessed distinct anatomical features that set it apart from its more well-known relatives.
Camposaurus
Camposaurus is a small, carnivorous theropod dinosaur from the Late Triassic period of North America, specifically the Norian stage. It is widely considered to be one of the oldest known neotheropod dinosaurs, with its fossil remains discovered in Arizona.
Chindesaurus
Chindesaurus is an extinct genus of basal saurischian dinosaur that lived in the southwestern United States during the Late Triassic period. Known primarily from a partial skeleton discovered in Petrified Forest National Park, Arizona, this bipedal carnivore was roughly the size of a wolf. Its exact classification has been a subject of debate among paleontologists, with various studies suggesting it was a herrerasaurid, a basal saurischian, or a theropod closely related to Tawa.