Adamantisaurus
Adamantisaurus was a genus of titanosaurian sauropod dinosaur that lived during the Late Cretaceous Period in South America. It is known from only six tail vertebrae, suggesting it was a large animal with a long neck and tail. Its exact evolutionary relationships are difficult to determine due to the limited fossil material.
Key Facts
- ›Adamantisaurus is known only from six tail vertebrae.
- ›It was a titanosaurian sauropod dinosaur.
- ›Fossils were discovered in the Adamantina Formation of Brazil.
- ›The genus lived during the Late Cretaceous Period.
- ›Estimates for its length range from 13 to 18 meters.
- ›Its weight estimates vary from 5 to 14.4 tonnes.
Large animal with a long neck and tail., Estimated length: 13-18 meters., Estimated weight: 5-14.4 tonnes.
Aeolosaurus, Trigonosaurus, Gondwanatitan
South America
About Adamantisaurus
Adamantisaurus is a genus of titanosaurian sauropod dinosaur known from the Late Cretaceous Period of South America. The genus is recognized from only a small number of fossilized tail vertebrae, making it one of the less completely understood sauropods. Despite the limited remains, its classification as a sauropod suggests it was a large animal characterized by a long neck and tail.
Discovery and Naming
The fossils of Adamantisaurus were unearthed in the Adamantina Formation, part of the Bauru Group in Brazil. While the remains were first noted in print in 1959, the genus was not formally described and named until 2006 by Brazilian paleontologists Rodrigo Santucci and Reinaldo Bertini. It holds the distinction of being the first dinosaur named in that year. The type specimen consists of six caudal vertebrae and two chevrons. The genus name, Adamantisaurus, is a reference to the Adamantina Formation and the common suffix 'sauros' (lizard). The species, Adamantisaurus mezzalirai, is named in honor of Sérgio Mezzalira, the geologist who originally discovered the specimen.
Geological Context
Adamantisaurus is known exclusively from the Adamantina Formation in Brazil. The precise age of the Bauru Group, to which the Adamantina Formation belongs, is still debated, but it is generally placed between the Turonian and early Maastrichtian stages of the Late Cretaceous epoch, roughly 93 to 70 million years ago. During this time, Adamantisaurus shared its environment with other titanosaurians, such as Gondwanatitan.
Physical Characteristics and Classification
Due to the scarcity of fossil material, detailed anatomical descriptions of Adamantisaurus are limited, with knowledge primarily derived from the anterior portion of its tail. As a titanosaurian sauropod, it is inferred to have been a large herbivore. Size estimates vary, with some paleontological assessments suggesting a length of approximately 13 meters (43 ft) and a weight of 5 tonnes (5.5 short tons), while others propose a larger size of up to 18 meters (60 ft) and 14.4 tonnes (15.8 short tons). The phylogenetic relationships of Adamantisaurus are not well-established, though it shows some similarities to Aeolosaurus and Trigonosaurus. Its vertebral articulations suggest it was more derived than Malawisaurus and likely belonged to the clade Lithostrotia.
Source: Wikipedia ↗
Frequently Asked Questions
What kind of dinosaur was Adamantisaurus?
Adamantisaurus was a titanosaurian sauropod, a group of large, long-necked, herbivorous dinosaurs. As a sauropod, it is presumed to have been a very large animal.
Where were the fossils of Adamantisaurus found?
The fossils of Adamantisaurus were discovered in the Adamantina Formation, located in the Brazilian state of São Paulo. This formation is part of the Bauru Group.
When did Adamantisaurus live?
Adamantisaurus lived during the Late Cretaceous Period. The Adamantina Formation, where its fossils were found, is estimated to be from the Turonian through early Maastrichtian stages, approximately 93 to 70 million years ago.
What does the name Adamantisaurus mean?
The name Adamantisaurus is derived from the Adamantina Formation where the fossil was found, combined with the Greek word 'sauros,' meaning 'lizard.' The species name, mezzalirai, honors Sérgio Mezzalira, the geologist who discovered the specimen.
How well-known is Adamantisaurus?
Adamantisaurus is considered poorly known because its remains consist of only six tail vertebrae. This limited fossil record makes it difficult to determine its exact anatomy and relationships with other dinosaurs.
What were the estimated sizes of Adamantisaurus?
Estimates for Adamantisaurus vary. In 2010, one estimate placed its length at roughly 13 meters and its weight at 5 tonnes. A later estimation in 2020 suggested a larger size of 18 meters long and 14.4 tonnes.
Related Dinosaur species
Arrudatitan
Arrudatitan was a titanosaur sauropod dinosaur that lived during the Late Cretaceous period in what is now Brazil. This relatively gracile titanosaur is known from partial skeletal remains, including vertebrae, ribs, and limb bones. The genus was established in 2021 to house the species previously known as Aeolosaurus maximus, reflecting its distinctiveness from the Aeolosaurus genus.
Austroposeidon
Austroposeidon is a genus of titanosaurian sauropod dinosaur that lived in Brazil during the Late Cretaceous period. Known from a single adult specimen, it is recognized as the largest dinosaur discovered in Brazil, with an estimated length of approximately 25 meters. Its scientific name, Austroposeidon magnificus, reflects its southern origin and magnificent size.
Brasilotitan
Brasilotitan was a titanosaurian sauropod dinosaur from Brazil, living during the Late Cretaceous period. Named for its Brazilian origin and its herbivorous diet, it was characterized by a distinctive squared-off snout and a relatively small size for a sauropod.