August 31, 2013
In his classic monograph, Hatcher (1901) illustrated the cervical vertebrae of the Diplodocus carnegii holotype CM 84 with beautiful drawings:
But only in lateral view.
Other plates show photos in lateral, anterior and posterior views, and these are useful even though they’re much less clear than the drawings.
But he didn’t illustrate the vertebrae at all in dorsal or ventral view — and as far as I know, no-one else has done so either. I would find these views really useful for something I’m working on. Does anyone have photos?
Hatcher, Jonathan B. 1901. Diplodocus (Marsh): its osteology, taxonomy and probable habits, with a restoration of the skeleton. Memoirs of the Carnegie Museum 1:1-63 and plates I-XIII.
August 30, 2013
Here’s the mounted skeleton of Brachiosaurus altithorax outside the Field Museum in Chicago, based on the holotype FMNH P25107, with missing parts filled in from the mounted Giraffatitan brancai MB.R.2181 at the Museum für Naturkunde Berlin. To see it with humans and other animals for scale, go here.
And here’s the same thing in silhouette. It may be informative to compare this to the very different silhouette of the mounted Rapetosaurus krausei, also at the Field Museum.
I’m putting these up so they can be used. Like everything on this blog, these images are released under the CC BY license, so you can do with them what you like as long as you credit us. Go nuts!
August 19, 2013
August 13, 2013
All we have for the references are:
- Knight CR (1897) Restoration of Brontosaurus.
- Burian Z (1941) Snorkelling Brachiosaurus.
But a reviewer asked us:
Please edit the reference list with additional information, e.g.: “on the NE wall of the AMNH Hall of Saurischian Dinosaurs” or whatever is appropriate for [these references].
I don’t really have any idea what the right way is to cite artwork — does anyone?
And does anyone have the necessary information? We all know that Zallinger’s “Age of Reptiles” mural is on the wall of the YPM dinosaur hall, but where are the originals of the Knight Brontosaurus and the Burian Brachiosaurus?
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!