Amargatitanis

Amargatitanis
Temporal range: Early Cretaceous
Scientific classification
Kingdom: Animalia
Phylum: Chordata
Class: Sauropsida
Superorder: Dinosauria
Order: Saurischia
Suborder: Sauropodomorpha
Infraorder: Sauropoda
(unranked): Dicraeosauridae
Genus: Amargatitanis
Apesteguía, 2007
Species
  • A. macni Apesteguía, 2007

Amargatitanis (meaning "Amarga giant") is a genus of dicraeosaurid sauropod dinosaur (a type of large, long-necked quadrupedal herbivorous dinosaur) from the Barremian-age (Lower Cretaceous) La Amarga Formation of Neuquén, Argentina.

Classification

The holotype, MACN PV N53, which was collected in March 1983 by José Fernando Bonaparte, consists of two tail vertebrae, a right ischium, and a partial right hindlimb. Although classified as a titanosaur in the original description, the titanosaur placement of Amargatitanis was subsequently questioned by later authors, who noted that a scapula (MACM PV N34) and six tail vertebrae (MACN PV N51) seen as syntypes of Amargatitanis were found at a different locality than MACN PV N53 and that putative titanosaur characters of the genus were invalid.[1][2][3] A 2016 re-evaluation by Pablo Ariel Gallina reclassified Amargatitanis as a dicraeosaurid.[4]

References

  1. ↑ Apesteguía, Sebastián (2007). "The sauropod diversity of the La Amarga Formation (Barremian), Neuquén (Argentina)". Gondwana Research 12 (4): 533–546. doi:10.1016/j.gr.2007.04.007.
  2. ↑ D'Emic, M. D. (2012). "The early evolution of titanosauriform sauropod dinosaurs". Zoological Journal of the Linnean Society 166 (3): 624–671. doi:10.1111/j.1096-3642.2012.00853.x.
  3. ↑ Mannion, P. D., Upchurch P., Barnes R. N., & Mateus O. (2013). Osteology of the Late Jurassic Portuguese sauropod dinosaur Lusotitan atalaiensis (Macronaria) and the evolutionary history of basal titanosauriforms. Zoological Journal of the Linnean Society. 1-109.
  4. ↑ Pablo Ariel Gallina, in press. Reappraisal Of The Early Cretaceous Sauropod Dinosaur Amargatitanis Macni (Apesteguía, 2007), From Northwestern Patagonia, Argentina. Cretaceous Research (advance online publication)doi:10.1016/j.cretres.2016.04.002http://www.sciencedirect.com/science/article/pii/S0195667116300507


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