Amargatitanis

Amargatitanis
Temporal range: Early Cretaceous
Scientific classification
Kingdom:Animalia
Phylum:Chordata
Clade:Dinosauria
Order:Saurischia
Suborder:†Sauropodomorpha
Clade:†Sauropoda
Family:†Dicraeosauridae
Genus:†Amargatitanis
Apesteguía, 2007
Species: †A. macni
Binomial name
Amargatitanis 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, Philip D.; Upchurch, Paul; Barnes, Rosie N.; Mateus, Octávio (2013). "Osteology of the Late Jurassic Portuguese sauropod dinosaur Lusotitan atalaiensis (Macronaria) and the evolutionary history of basal titanosauriforms" (PDF). Zoological Journal of the Linnean Society. 168: 98–206. doi:10.1111/zoj.12029.
  4. ↑ Ariel Gallina, Pablo (2016). "Reappraisal Of The Early Cretaceous Sauropod Dinosaur Amargatitanis macni (Apesteguía, 2007), From Northwestern Patagonia, Argentina". Cretaceous Research. 64: 79–87. doi:10.1016/j.cretres.2016.04.002.


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