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Re: [dinosaur] Juvenile Daspletosaurus from Late Cretaceous of Alberta (free pdf)

I can see them fine on a different computer; maybe my Mac doesn't like the file format for some reason. 

Thanks.

Bruce


From: Ben Creisler <bcreisler@gmail.com>
Sent: November 29, 2019 1:06 AM
To: Bruce Woollatt <brucewoollatt@hotmail.com>; dinosaur-l@usc.edu <dinosaur-l@usc.edu>
Subject: Re: [dinosaur] Juvenile Daspletosaurus from Late Cretaceous of Alberta (free pdf)
 
Ben Creisler


The photos are there when I open the Word document for the Supplement.

The size of the document says:

11.6 MB (12,250,038 bytes)

Does this match what you see in Properties?



On Thu, Nov 28, 2019 at 9:53 PM Bruce Woollatt <brucewoollatt@hotmail.com> wrote:
Hi all;

I can't see any of the images that are listed in the article's supplimentary information download. There's a series of descriptions, but no images. Are they missing or is it just me?

Bruce

From: dinosaur-l-request@usc.edu <dinosaur-l-request@usc.edu> on behalf of Ben Creisler <bcreisler@gmail.com>
Sent: November 28, 2019 11:03 AM
To: dinosaur-l@usc.edu <dinosaur-l@usc.edu>
Subject: [dinosaur] Juvenile Daspletosaurus from Late Cretaceous of Alberta (free pdf)
 

Ben Creisler

A new paper with free pdf:


Jared T. Voris, Darla K. Zelenitsky, François Therrien & Philip J. Currie (2019)
Reassessment of a juvenile Daspletosaurus from the Late Cretaceous of Alberta, Canada with implications for the identification of immature tyrannosaurids.
Scientific Reports 9, Article number: 17801
doi: https://doi.org/10.1038/s41598-019-53591-7
https://www.nature.com/articles/s41598-019-53591-7

Free pdf:
https://www.nature.com/articles/s41598-019-53591-7.pdf

Daspletosaurus is a large tyrannosaurine found in upper Campanian deposits of Alberta and Montana. Although several large subadult and adult individuals of this taxon are known, only one juvenile individual, TMP 1994.143.1, has been identified. This specimen has played a key role in the idea that juvenile tyrannosaurid individuals are difficult to differentiate among species. Here the taxonomic affinity of TMP 1994.143.1 is reassessed in light of a juvenile tyrannosaurine postorbital recently discovered in the Dinosaur Park Formation of Alberta. Anatomical comparisons and phylogenetic analyses reveal that TMP 1994.143.1 is referable to the albertosaurine Gorgosaurus libratus, whereas the new postorbital belongs to a small juvenile Daspletosaurus. This taxonomic reassignment of TMP 1994.143.1 results in the juvenile ontogenetic stage of Daspletosaurus being known only from two isolated cranial elements. The new postorbital provides insights into early Daspletosaurus ontogeny, revealing that the cornual process developed earlier or faster than in other tyrannosaurids. Although some ontogenetic changes in the postorbital are found to be unique to Daspletosaurus, overall changes are most consistent with those of other large tyrannosaurines. Our results also show that diagnostic features develop early in ontogeny, such that juveniles of different tyrannosaurid species are easier to differentiate than previously thought.

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