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Re: Titanosaur paleobiology



Ben Creisler
bcreisler@gmail.com

With the discussions about the weight of Dreadnoughtus, this recent
preprint article from Ameghiniana may be of interest. Titanosaurs are
muscled in a different way from other sauropods and have a broader,
less columnar stance, suggesting more massively built animals. The
preprint refers to supplementary documents that do not appear to be
available at the moment.

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http://www.researchgate.net/publication/264935579_PALEOBIOLOGY_OF_TITANOSAURS_REPRODUCTION_DEVELOPMENT_HISTOLOGY_PNEUMATICITY_LOCOMOTION_AND_NEUROANATOMY_FROM_THE_SOUTH_AMERICAN_FOSSIL_RECORD

On Fri, Jul 18, 2014 at 2:38 PM, Ben Creisler <bcreisler@gmail.com> wrote:
> Ben Creisler
> bcreisler@gmail.com
>
> A new advance paper:
>
>
> Rodolfo A. García, Leonardo Salgado, Mariela S. Fernández, Ignacio A.
> Cerda, Ariana Paulina Carabajal, Alejandro Otero, Rodolfo A. Coria &
> Lucas E. Fiorelli (2014)
> Paleobiology of titanosaurs: reproduction, development, histology,
> pneumaticity, locomotion and neuroanatomy from the South American
> fossil record.
> Ameghiniana (advance online publication)
> doi:10.5710/AMGH.16.07.2014.829
> http://www.ameghiniana.org.ar/index.php/ameghiniana/article/view/1016
>
> Much of the current paleobiological knowledge on titanosaur sauropods
> was attained in just the last fifteen years, in particular that
> related to reproductive and developmental biology. In recent years it
> has also been progress on other poorly explored topics, such as
> pneumaticity, architecture and locomotion, and reconstruction
> endocasts and associated structures. Some titanosaurs laid numerous,
> relatively small Megaloolithidae eggs (with diameters ranging from 12
> to 14 cm) in nests dug on the ground and, as is known from the South
> American records, probably eggs of multispherulitic morphotype. During
> ontogeny, certain titanosaurs displayed some variations in cranial
> morphology, some of them likely associated with the differing feeding
> habits between hatchlings and adults. The osseous tissue of some adult
> titanosaurs was rapidly and cyclically deposited showing a greater
> degree of remodeling than in other sauropods. Saltasaurines, in
> particular, show evidence of postcranial skeletal pneumaticity in both
> axial and appendicular skeleton, providing clues about soft tissue
> anatomy and the structure of the respiratory system. Titanosaurs like
> all sauropods were characterized by being fully quadrupedal, although
> some appendicular features and putative trackways indicate that their
> stance was not as columnar as in other sauropods. These anatomical
> peculiarities are significantly developed in saltasaurines, a derived
> group of titanosaurs. Compared with other sauropods, some titanosaurs
> seem to have had very poor olfaction but would have been capable of
> capturing sounds in a relatively wide range of high frequencies,
> although not to the extent of living birds.