Puertasaurus [SEP] parent taxon
heavily expanded neural spines on the cervical vertebrae, which result in the neural spines being longer than the vertebral body. The neural spines possess strong dorsolateral (high on the side) ridges, robust spinoprezygapophyseal laminae (projections in front of the neural spine) of the posterior cervicals, anterior dorsals that are very short from front to back, and the animal's giant size.
"Puertasaurus" belonged to the clade Titanosauria, one of the most diverse groups of sauropods. It is a member of the group Lognkosauria, which
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.
Classification.
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. Lognkosauria has been found to include other giant sauropods, such as "Puertasaurus", "Argentinosaurus", "Patagotitan" and "