Lambeosaurus nasal misidentification
So, while looking through old JVPs I ran across this oddity. Perhaps it has already been discussed elsewhere. Any dino-guys out there, feel free to chirp in.
Evans and Reisz (2007) took a look at the skull of Lambeosaurus magnicristatus (Fig. 1) and apparently misidentified some bones. They put the nasal above and behind the orbit, gave the skull two premaxillae (per side) and did not label a frontal. Here it is:
Figure 1. From Evans and Reisz (2007) in which the skull of Lambeosaurus is missing a frontal, has two premaxillae and the nasal is above the eye socket.
This strikes me as odd. Is there a reason why labels can’t be like so (Fig. 2)?
Figure 2. Reinterpretation of Lambeosaurus skull.
This way the frontal and nasal are where they should be and the premaxilla is reduced to a single bone.
We’ll take a look at bones that make up crests soon, as I see similarities here to the pterosaur Tupuxuara.
As always, I encourage readers to see specimens, make observations and come to your own conclusions. Test. Test. And test again.
Evidence and support in the form of nexus, pdf and jpeg files will be sent to all who request additional data.
References
Evans DC and Reisz RR 2007. Anatomy and relationships of Lambeosaurus magnicristatus, a crested hadrosaurid dinosaur (Ornithischia) from the Dinosaur Park Formation, Alberta. Journal of Vertebrate Paleontology 27 (2): 373–393.
2012-11-08 18:48:05
Source: http://pterosaurheresies.wordpress.com/2012/11/09/lambeosaurus-nasal-misidentification/
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