Chucarosaurus
Chucarosaurus is an extinct genus of titanosaurian dinosaur that lived in Argentina during the Late Cretaceous period. Its name, derived from a Quechua word for "indomitable reptile," reflects its classification as a large, slender-limbed sauropod. Fossil remains, including limb and pelvic bones, provide insights into its anatomy and its place within the titanosaur family.
Key Facts
- ›Chucarosaurus lived during the Late Cretaceous period, specifically the middle Cenomanian to lower Turonian ages.
- ›Its fossils were discovered in the Huincul Formation of Río Negro Province, Argentina.
- ›The genus name "Chucarosaurus" means "indomitable reptile."
- ›It was a large, slender-limbed titanosaurian dinosaur.
- ›Its femur was approximately 1.9 meters long.
- Large, slender-limbed titanosaurian dinosaur
- Femur approximately 1.9 meters long
- Humerus about 78% the length of the femur
- Ischium with a shorter, more robust iliac peduncle than in other titanosaurs
Argentinosaurus, Bustingorrytan, Choconsaurus, Notocolossus, Lognkosauria
Argentina
About Chucarosaurus
Chucarosaurus is an extinct genus of titanosaurian dinosaur that roamed the Earth during the Late Cretaceous period. The genus name, "Chucarosaurus," is derived from a Quechua word meaning "hard and indomitable animal" and the Latin word "saurus," meaning "reptile," thus translating to "indomitable reptile." The species name, "diripienda," is of Latin origin, meaning "scrambled."
Discovery and Classification
The holotype specimen of Chucarosaurus, MPCA PV 820, was unearthed from the Huincul Formation in Río Negro Province, Argentina. This formation dates to the middle Cenomanian–lower Turonian ages. The fossil remains consist of several limb and pelvic bones from a single individual, including a complete left humerus, partial left radius, a complete left metacarpal II, a left ischium, partial left femur and fibula, and a partial right tibia. An additional specimen, MPCA PV 821, comprising a left femur and tibia, has been assigned as a paratype. In 2023, paleontologists Agnolin et al. formally described Chucarosaurus diripienda as a new genus and species of colossaurian titanosaur. Phylogenetic analyses place Chucarosaurus as a colossaurian titanosaur, closely related to a clade formed by Notocolossus and the Lognkosauria.
Description and Paleoenvironment
Chucarosaurus is characterized as a large, slender-limbed titanosaur. Its femur measured approximately 1.9 meters (6.2 ft) in length, which is notably smaller than that of Argentinosaurus. The forelimb was shorter than the hindlimb, with a humerus that was 78% the length of the femur, a common trait among titanosaurs. Distinctive anatomical features include a thickened deltopectoral crest on the humerus in its distal half and an ischium with a shorter, more robust iliac peduncle compared to other titanosaurs. Chucarosaurus inhabited the terrestrial environments of what is now Argentina, sharing its ecosystem during the Late Cretaceous with a diverse array of other dinosaurs, including fellow titanosaurs, rebbachisaurids, carcharodontosaurids, abelisaurids, and various other theropods and ornithopods.
Source: Wikipedia ↗
Frequently Asked Questions
What does the name Chucarosaurus mean?
The genus name Chucarosaurus combines "chucaro," a Quechua word for "hard and indomitable animal," with the Latin word "saurus," meaning "reptile." Therefore, it translates to "indomitable reptile."
When did Chucarosaurus live?
Chucarosaurus lived during the Late Cretaceous period, specifically during the middle Cenomanian to lower Turonian ages. This places it in a period roughly between 96 and 90 million years ago.
Where were Chucarosaurus fossils found?
Fossils of Chucarosaurus were discovered in the Huincul Formation, located in the Pueblo Blanco Natural Reserve in Río Negro Province, Argentina.
What kind of dinosaur was Chucarosaurus?
Chucarosaurus was a titanosaurian dinosaur, belonging to the larger group of sauropods. It is described as a large, slender-limbed titanosaur.
What are some of the physical characteristics of Chucarosaurus?
Chucarosaurus had a femur that was approximately 1.9 meters (6.2 ft) long. Its humerus was about 78% the length of its femur, which is typical for titanosaurs, and its ischium had a shorter, more robust iliac peduncle compared to other titanosaurs.
Related Dinosaur species
Aeolosaurus
Aeolosaurus was a genus of titanosaurian sauropod dinosaur that lived in South America during the Late Cretaceous Period. Characterized by a long neck and tail, it was a quadrupedal herbivore. The genus is well-represented, with remains from several individuals belonging to at least two species, though no skull material has been recovered.
Antarctosaurus
Antarctosaurus was a genus of titanosaurian sauropod dinosaurs that lived during the Late Cretaceous Period in South America. The genus is known from several species, though many are considered dubious due to fragmentary remains and taxonomic confusion. The type species, Antarctosaurus wichmannianus, is estimated to have reached about 17 meters in length, while Antarctosaurus giganteus, though poorly known, represents one of the largest dinosaurs ever discovered.
Argyrosaurus
Argyrosaurus is a genus of titanosaurian sauropod dinosaur that lived approximately 70 million years ago during the Late Cretaceous Period. Fossils of this large herbivore were discovered in Argentina, which inspired its name meaning 'silver lizard'.