Arackar
Arackar is an extinct genus of lithostrotian sauropod, possibly belonging to the Saltasauridae family. Discovered in the Hornitos Formation of Chile, its single species, Arackar licanantay, represents the most complete sauropod specimen found in the country. Due to its juvenile holotype, the full size of an adult Arackar remains unknown.
Key Facts
- ›Arackar licanantay means "bones of the Atacamans" in the Kunza language.
- ›Fossils were discovered in the Hornitos Formation of Atacama Province, Chile.
- ›The holotype specimen is the most complete sauropod fossil found in Chile.
- ›It lived during the Late Cretaceous period, specifically the Campanian-Maastrichtian stages.
- ›Distinctive features include the hollowing between vertebral processes and reduced ridges on the neural spine.
- Estimated Body Length of Juvenile Holotype: 6.3 Meters .
- High and Wide Hollowing Between the Front Joint Process and Vertebral Body.
- Hollowing Between the Parapophysis and Lamina Extends Over the Front of the Neural Arch Pedestal.
- Posterior Joint Processes Are Narrower Than the Neural Spine.
- Reduced and Shorter Ridges Between the Neural Spine and Posterior Joint Processes.
Isisaurus, Rapetosaurus
Chile
About Arackar
Arackar: The Skeleton from the Atacama
Arackar is an extinct genus of sauropod dinosaur that roamed the Earth during the Late Cretaceous period. Its scientific name, Arackar licanantay, is derived from the Kunza language, meaning "skeleton of the Atacamans," a tribute to its discovery location in the Atacama Province of Chile.
Discovery and Significance
The holotype specimen of Arackar licanantay was unearthed in the Hornitos Formation, specifically at Quebrada La Higuera. This discovery is particularly significant as the fossil material includes vertebrae from the neck and back, along with a humerus, femur, and ischium, making it the most complete sauropod specimen ever found in Chile. The fossils date back to the Campanian-Maastrichtian stages of the Late Cretaceous.
Description and Classification
The known fossil remains belong to a juvenile individual, with an estimated body length of approximately 6.3 meters (21 feet). The full adult size of Arackar remains unknown. Paleontologists have identified distinctive anatomical features, including specific hollowing patterns between vertebral processes and reduced ridges on the neural spine. Arackar has been classified within the Titanosauria, specifically the Lithostrotia, and is considered a sister taxon to the genus Isisaurus.
Paleoecology and Habitat
While details about Arackar's specific habitat and ecological role are limited, its classification as a sauropod indicates it was a herbivore. As a lithostrotian, it belonged to a diverse group of titanosaurs that were widespread during the Cretaceous period. The discovery in Chile provides valuable insights into the dinosaur fauna of South America during the final stages of the Mesozoic Era.
Source: Wikipedia ↗
Frequently Asked Questions
What does the name Arackar mean?
The genus name Arackar means "skeleton" in the Kunza language. The species name, licanantay, translates to "of the Atacamans" in the same language, reflecting its discovery location.
Where was Arackar discovered?
Fossils of Arackar were discovered in the Hornitos Formation, located in Atacama Province, Chile. The holotype was found at Quebrada La Higuera.
What period did Arackar live in?
Arackar lived during the Late Cretaceous period. Specifically, the fossils were found in rock layers dating to the Campanian and Maastrichtian stages.
How large was Arackar?
The holotype specimen of Arackar belonged to a juvenile individual and was estimated to be around 6.3 meters (21 feet) long. The size of a fully grown Arackar is currently unknown.
What is known about Arackar's physical characteristics?
Distinctive features identified include the high and wide hollowing between the front joint process and vertebral body. The posterior joint processes were narrower than the neural spine, with reduced ridges.
What group does Arackar belong to?
Arackar is classified as a lithostrotian sauropod, possibly part of the Saltasauridae family. It is considered a sister taxon to Isisaurus within the Lithostrotia.
Related Dinosaur species
Chilesaurus
Chilesaurus is an extinct genus of herbivorous dinosaur known from the Late Jurassic period of Chile, living approximately 148-147 million years ago. Its classification has been a subject of debate, with many researchers considering it a theropod, while others suggest it might be an ornithischian. This unique combination of traits has significant implications for understanding dinosaur evolution.
Abditosaurus
Abditosaurus is an extinct genus of titanosaurian sauropod dinosaur that lived during the Late Cretaceous period in what is now Catalonia, Spain. It is known from the most complete titanosaur skeleton ever discovered in Europe, representing a large species that inhabited the Ibero-Armorican Island. Phylogenetic analyses suggest it was related to South American and African saltasaurines, distinguishing it from other European dwarf sauropods.
Acantholipan
Acantholipan is a genus of herbivorous nodosaurid dinosaur discovered in Mexico. It lived during the early Santonian age of the Late Cretaceous period and is known from fragmentary fossils, including a partial skeleton with osteoderms. Acantholipan gonzalezi is the type species, named in honor of paleontologist Arturo Homero González-González.