Hi All! Welcome to this week’s PaleoNews. Over the past few days, a new hadrosaur from the continent of Appalachia has been discovered (Which I’m very excited about) as well as an antelope who’s nasal anatomy seems to mimic that of hadrosaurian dinosaurs.
One of the most interesting findings in the past few days has come out of the examination of the skull of an extinct antelope taxon called Rusingoryx atopocranion. This large, herbivorous mammal hails from the Late Pleistocene of Kenya and bears a nasal dome which may have been able to produce sounds like a trumpet. Incredibly, the ontogeny of Rusingoryx atopocranion bears similarities with that of lambeosaurine dinosaurs. O’Brien et. al. (2016) conclude that because of the similarities between the extinct antelope and lambeosaurs, osseous nasal crests develop only within specific enivronmental, ontogenic, and evolutionary circumstances.
The past couple of months have been extremely successful for Appalachian paleontology. In the fall of 2015, the presence of leptoceratopsids on Appalachia was announced. Now, a new species of hadrosaurid dinosaur named Eotrachodon sheds light on the probable Appalachian origins for hadrosaurids. Eotrachodon orientalis is known from a partially complete skeleton with an extremely well preserved skull from the Mooreville Chalk Formation of Alabama. During the Cretaceous, Eotrachodon would have roamed around the coast of southwestern Appalachia, likely drinking from the rivers and deltas which ran directly into the Western Interior Seaway. A phylogenetic analysis by Prieto-Marquez et. al. (2016) has found Eotrachodon to be a sister taxon to lambeosaurinae and saurolophinae. The non-saurolophine non-lambeosaurine Hadrosaurus as well as Lophorhothon, a hadrosauroid extremely closely related to the ancestor of hadrosaurids, have been found on Appalachia, it seems likely that the birthplace of hadrosauridae was on the aforementioned landmass.
THE INTERNET AND PALEONTOLOGY
Dodos were incredible animals, but often they are thought of as evolutionary failures or simply just dumb animals. Check out this post at Twilight Beasts detailing these wonderful birds.
At The Bite Stuff,
At Mark Witton’s Blog, he discusses the giant Deinosuchus and showcases his fantastic artwork of the giant marine predator. You can find the post here.
At Extinct Monsters, Ben has written two fantastic articles comparing and contrasting the fossil exhibitions of the Perot Museum and the Houston Museum of Natural Science. These post will be especially interesting to those interested in in the aesthetics and scientific impact of museums. You can find the post on the Perot Museum here and the one on the HMNS here.
At the Royal Tyrell Museum’s blog, they spotlight the newest lecture of their speaker series. Within it, Don Henderson discusses pterosaurs. You can find the post here.
This week we have a C. megalodon tooth housed within the Stamford Museum’s collections. C. megalodon were massive sharks which preyed on a variety of marine animals, including whales, from the Miocene to the Pliocene epochs of the Neogene period.
1. O’Brien H. D.; Faith, J. T.; Jenkins, K. E.; Peppe, D. J.; Plummer, T. W.; Jacobs, Z. L.; Li, B.; Joannes-Boyau, R.; Price, G.; Feng, Y.; Tryon, C. A. 2016.”Unexpected Convergent Evolution of Nasal Domes between Pleistocene Bovids and Cretaceous Hadrosaur Dinosaurs.” Current Biology. DOI:10.1016/j.cub.2015.12.050
2. Prieto-Marquez, A.; Erickson, G. M.; Ebersole, J. A. 2016. “A primitive hadrosaurid from southeastern North America and the origin and early evolution of ‘duck-billed’ dinosaurs. “Journal of Vertebrate Paleontology: e1054495. DOI:10.1080/02724634.2015.1054495.