Lognkosauria

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Lognkosauria
Temporal range: Late Cretaceous, 101.1–83.5 Ma
Futalognkosaurus Royal Ontario Museum.jpg
Replica mount of Futalognkosaurus at the Royal Ontario Museum
Scientific classification e
Kingdom: Animalia
Phylum: Chordata
Clade: Dinosauria
Order: Saurischia
Suborder: Sauropodomorpha
Clade: Sauropoda
Clade: Titanosauria
Clade: Lithostrotia
Clade: Lognkosauria
Calvo et al. 2007
Genera

Lognkosauria is a group of giant long-necked sauropod dinosaurs within the clade Titanosauria. It includes some of the largest and heaviest dinosaurs known.

Description[edit]

Lognkosaurians can be distinguished from other titanosaurs by the wide and unusually thick cervical rib loops on their neck vertebrae, their extremely robust neck neural spines, the relatively narrow neural canal, and their huge vaulted neural arches. They also had very wide dorsal vertebrae with wing-like side processes, and extremely wide rib cages. Their dorsal side processes are also fairly in-line with the level of the neural canal, instead of being attached further up the neural arch as in lithostrotians.[citation needed]

Skull material from Malawisaurus, the sister taxon to Lognkosauria, indicates that lognkosaurians at least began with the big-nosed, rounded head shape of earlier titanosaurs and more basal macronarians.[citation needed]

Classification[edit]

Lognkosauria was defined as the clade encompassing the most recent common ancestor of Futalognkosaurus dukei and Mendozasaurus neguyelap and all its descendants. Malawisaurus may be related to this group.[1] Lognkosauria has been found to include other giant sauropods, such as Puertasaurus, Argentinosaurus, Patagotitan and Notocolossus, Drusilasaura, and Traukutitan.[2][3][4][5][6]

Titanosauria


Dreadnoughtus Dreadnoughtus NT small.jpg


Lithostrotia
Rinconsauria

Rinconsaurus Rinconsaurus test 2.jpg




Muyelensaurus




Aeolosaurus



Overosaurus Overosaurus life restoration.jpg







Bonitasaura




Notocolossus Notocolossus NT small.jpg


Lognkosauria

Mendozasaurus





Futalognkosaurus Futalognkosaurus BW.jpg



Quetecsaurus Quetecsaurus.jpg





Puertasaurus Puertasaurus reuili.png



Drusilasaura




Argentinosaurus Argentinosaurus BW.jpg



Patagotitan











References[edit]

  1. ^ Calvo, J. O., Porfiri, J. D., González-Riga, B. J., and Kellner, A. W. (2007) "A new Cretaceous terrestrial ecosystem from Gondwana with the description of a new sauropod dinosaur". Anais Academia Brasileira Ciencia, 79(3): 529-41.
  2. ^ Calvo, J. O.; Porfiri, J. D.; González Riga, B. J.; Kellner, A. W. A. (2007). "Anatomy of Futalognkosaurus dukei Calvo, Porfiri, González Riga, & Kellner, 2007 (Dinosauria, Titanosauridae) from the Neuquen Group, Late Cretaceous, Patagonia, Argentina" (PDF). Arquivos do Museu Nacional. 65 (4): 511–526. Archived from the original (PDF) on 2011-07-13. 
  3. ^ José L. Carballido; Diego Pol; Alejandro Otero; Ignacio A. Cerda; Leonardo Salgado; Alberto C. Garrido; Jahandar Ramezani; Néstor R. Cúneo; Javier M. Krause (2017). "A new giant titanosaur sheds light on body mass evolution among sauropod dinosaurs". Proceedings of the Royal Society B: Biological Sciences. 284 (1860): 20171219. doi:10.1098/rspb.2017.1219. 
  4. ^ Juárez Valieri, Rubén D.; Calvo, Jorge O. (2011). "Revision of MUCPv 204, a Senonian Basal Titanosaur from Northern Patagonia" (PDF). Paleontología y dinosarios desde América Latina: 143–152. Archived from the original (PDF) on 2011-07-06. 
  5. ^ Navarrete, César; Casal, Gabriel; Martínez, Rubén (2011). "Drusilasaura deseadensis gen. et sp. nov., a new titanosaur (Dinosauria-Sauropoda), of the Bajo Barreal Formation, Upper Cretaceous of north of Santa Cruz, Argentina". Revista Brasileira de Paleontologia. 14 (1): 1–14. doi:10.4072/rbp.2011.1.01. 
  6. ^ Bernardo J. Gonzàlez Riga; Philip D. Mannion; Stephen F. Poropat; Leonardo D. Ortiz David; Juan Pedro Coria (2018). "Osteology of the Late Cretaceous Argentinean sauropod dinosaur Mendozasaurus neguyelap: implications for basal titanosaur relationships". Zoological Journal of the Linnean Society. in press. doi:10.1093/zoolinnean/zlx103.