Lognkosauria

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

Lognkosaurians Temporal range: Early-Late Cretaceous, 132.9–70.9 Ma  PreꞒ Ꞓ O S D C P T J K Pg N
Replica mount of Futalognkosaurus at the Royal Ontario Museum
Scientific classification
Kingdom:	Animalia
Phylum:	Chordata
Clade:	Dinosauria
Clade:	Saurischia
Clade:	†Sauropodomorpha
Clade:	†Sauropoda
Clade:	†Macronaria
Clade:	†Titanosauria
Clade:	†Lithostrotia
Clade:	†Colossosauria
Clade:	†Lognkosauria Calvo et al. 2007
Genera
†Aegyptosaurus?[citation needed] †Argentinosaurus †Drusilasaura †Futalognkosaurus †Quetecsaurus †Mendozasaurus †Notocolossus †Patagotitan †Puertasaurus †Traukutitan †Volgatitan

DescriptionEdit

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]}

ClassificationEdit

Lognkosauria was defined as the cladeencompassing 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, Notocolossus, Drusilasaura and Traukutitan.^{[2][3][4][5][6]}

Titanosauria	Dreadnoughtus    Lithostrotia Rinconsauria   Rinconsaurus        Muyelensaurus       Aeolosaurus     Overosaurus              Bonitasaura       Notocolossus    Lognkosauria   Mendozasaurus         Futalognkosaurus     Quetecsaurus          Puertasaurus      Drusilasaura       Argentinosaurus     Patagotitan

This article uses material from the Wikipedia article  Metasyntactic variable, which is released under the  Creative Commons Attribution-ShareAlike 3.0 Unported License.