Thomas Cullenさんのイラストまとめ

In our paper in @ScienceMagazine, we weigh in on the debate on soft-tissue reconstructions in theropod dinosaurs & show they likely had extra-oral tissues (‘lips’) covering their teeth rather than having exposed teeth like crocs.

Link to paper is here: https://t.co/iCHjuAhEA7

For #FossilFriday here are images from our new paper on the ornithomimosaurs that inhabited Mississippi in the Late Cretaceous (~84-85 million years ago).

One of the ways we distinguished the larger- & smaller-bodied species was by using bone histology to track their growth.

Here are @SUEtheTrex's femur, fibula, and rib.

By sampling a combination of weightbearing and non-weightbearing bones, we found that element choice can be important in mature animals from large species, where remodeling frequently becomes an issue in fibulae, ribs, & gastralia

#DYK we use lasers to vaporize small amounts of enamel from fossil teeth (like this troodontid #dinosaur), allowing the released gases to be analyzed for their chemical composition?

This can reveal info about the diet, habitat, and physiology of extinct animals.

#FossilFriday

For #FossilFriday (and to coincide with the 10th anniversary of @MuseumofNature's VMMB re-opening), here's the holotype foot of the ornithomimid #dinosaur Struthiomimus altus from the CMN collections, alongside images from Lambe's 1902 description of the specimen.

Looking for an update on #Canadian #palaeontology #research?

While the annual @CanSVP meeting itself may not be happening as we'd hoped, you can still check out the #CSVP2020 abstract volume, now available #openaccess through @VertAnatPalaeo:

https://t.co/C67jzrA29J

As I tele-work this morning, my #mondaythoughts are of our Northern BC #fieldwork camp up in the Spatsizi Plateau. What a great place for #SelfIsolation!

In honour of @kchibs defending his PhD today, here's the unusual aquatic mammal Desmostylus and Ounalashkastylus for #MammalMonday (the latter taxon named by @kchibs et al in 2016)