Lognkosauria

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Lognkosaurians
Temporal range:
Ma
Replica mount of Futalognkosaurus at the Royal Ontario Museum
Scientific classification Edit this classification
Domain: Eukaryota
Kingdom: Animalia
Phylum: Chordata
Clade: Dinosauria
Clade: Saurischia
Clade: †Sauropodomorpha
Clade: †Sauropoda
Clade: †Macronaria
Clade: †Titanosauria
Clade: †Colossosauria
Clade: †Lognkosauria
Calvo et al. 2007
Genera[2][3]

Lognkosauria is a

sauropod dinosaurs within the clade Titanosauria
. It includes some of the largest and heaviest dinosaurs known. They lived in South America and likely Asia during the Late Cretaceous period.

Description

Lognkosaurians can be distinguished from other titanosaurs by the wide and unusually thick cervical rib loops on their neck vertebrae, 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.[4]

Skull material from

sister taxon to Lognkosauria, indicates that lognkosaurians at least began with the big-nosed, rounded head shape of earlier titanosaurs and more basal macronarians.[5]

Classification

Lognkosauria was defined as the

Mendozasaurus neguyelap and all its descendants. Malawisaurus may be related to this group.[4] Lognkosauria has been found to include other giant sauropods, such as Puertasaurus, Argentinosaurus, Patagotitan, Notocolossus, Drusilasaura and Traukutitan.[6][7][8][9][10]

Titanosauria

References

  1. ISSN 0891-2963
    .
  2. ISSN 2197-9596
    .
  3. ISSN 2197-9596
    .
  4. ^
    PMID 17768539
    .
  5. doi:10.11646/zootaxa.4577.3.1
    .
  6. ^ 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.
  7. PMID 28794222
    .
  8. ^ 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.
  9. doi:10.4072/rbp.2011.1.01
    .
  10. hdl:10044/1/53967
    .
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