Go read this: Marugán-Lobón et al. 2013 on semicircular canal orientation and head posture in saurischian dinosaurs
August 7, 2013
I know it’s been quiet around here for a while. Mike and I have both been on vacation, and before that, we were both up to our necks in day-job work, and after we get back, we’ll be up to our necks in revising accepted manuscripts. So no time for a long post right now, but I couldn’t let this pass without notice: Jesús Marugán-Lobón, Luis Chiappe, and Andy Farke just published a cool paper on semicircular canal orientation in saurischians and its value–or lack thereof–as a reference system. This is something Mike and Darren and I have addressed before (here and here), but Marugán-Lobón et al. have gone waaaaay further than anyone else I know if in addressing the inherent variability in lateral semicircular canal orientation.
The TL;DR, from the abstract:
The variability of LSC relative to skull landmarks is large (ca. 50°) and likely unpredictable, thus making it an inconsistent reference system for comparing and describing the skulls of saurischian (sauropodomorph and theropod) dinosaurs.
But you shouldn’t stop there! The paper is short, straightforward, and freely available on PeerJ, so go read it. Read the review comments, too–like an increasing number of authors, Marugán-Lobón et al. put the whole paper trail up along with the finished paper. Nice work!