New species of Titanosaurs discovered in Chile | Paleontology
A new genus and species of lithostrotian titanosaurus have been identified from a partial skeleton found in northern Chile.
Arackar licanantay lived in what is now the Atacama region of Chile during the Late Cretaceous period, between 84 and 66 million years ago.
“The Titanosauria is very large and diverse, with repeated discoveries in what is now Argentina and Brazil,” said Dr David Rubilar-Rogers, paleontologist at the Museo Nacional de Historia Natural in Chile.
“However, it is much less common to find them on this side of the mountain range.”
“There are very few records of titanosaurs in this area, which makes Arackar licanantay a very valuable find.
The partial skeleton of Arackar licanantay, including cervical and dorsal vertebrae, humerus, femur, and ischium, was recovered from the Hornitos formation in northern Chile.
It is the most complete sauropod dinosaur recorded in Chile and the southern Pacific margin of South America.
It is also the third named dinosaur of Chile, after Atacamatitis chilensis and Chilesaurus diegosuarezi.
“Arackar licanantay is a novel lithostrotian titanosaur represented by associated and disarticulated bones that belong to a single subadult specimen approximately 6.3 m (20.7 feet) long, ”paleontologists said.
“This sauropod is diagnosed by a unique combination of features of the dorsal vertebrae and appendicular bones.”
“Another peculiarity of Arackar licanantay is linked to the disposition of its members ”, declared Dr Alexandre Vargas, paleontologist at the University of Chile.
“A characteristic of many titanosaurs is that their legs were at an open angle. The new dinosaur does not have this angle, it is quite straight compared to the femur of other titanosaurs.
The teams paper was published in the journal Cretaceous research.
David Rubilar-Rogers et al. 2021. Arackar licanantay gen. and sp. nov. a new lithostrotian (Dinosauria, Sauropoda) from the Late Cretaceous from the Atacama region, northern Chile. Cretaceous research 124: 104802; doi: 10.1016 / j.cretres.2021.104802