It’s Ultrasaurus… I mean, um, Ultrasauros… err, Supersaurus!
September 10, 2008
The remarkable object shown here (the one on the left) is a copy of the famous BYU 9044 bone. I know you’ve all heard the story a million times before: it’s the stuff of late-night parties, and fireside stories-from-grandpa, but it would be wrong not to recount it again. First described by Jensen (1985) as the holotype of the new brachiosaurid Ultrasaurus macintoshi (a name that was later changed to Ultrasauros macintoshi), it was much later shown – by Curtice et al. (1996) – to belong not to a brachiosaur, but to a diplodocid. Furthermore, because it was found literally among the bones of the holotype of the diplodocid Supersaurus vivianae, the most logical course of action was to, alas, sink Ultrasauros into Supersaurus… and hence Ultrasauros was no more.
Jensen (1985) figured the vertebra in right lateral view, so the left-hand view you’re getting here is the sort of thing that has sauropod vertebra fans swooning and lying awake at night. There is, of course, a ton of neat anatomy to talk about here.. but I don’t have time to talk about it. You will no doubt have been impressed by the size: the scale is kindly provided by Sam Heads of Palaeoentemology and Insect Evolution.
Curtice, B., Stadtman, K. L. & Curtice, L. J. 1996. A reassessment of Ultrasauros macintoshi (Jensen, 1985). In Morales, M. (ed) The Continental Jurassic. Museum of Northern Arizona Bulletin 60, 87-95.
Jensen, J. A. 1985. Three new sauropod dinosaurs from the Upper Jurassic of Colorado. Great Basin Naturalist 45, 697-709.
Special Bonus: Non-Sauropod Saurischian Vertebra Picture Of The Week!
Hi, Mike here. It’s a bit rude to tag onto the end of Darren’s post, but I don’t want to make a brand new post and shove Ultrasaurus, er, Ultrasauros off the front-page. Anyway, I’ve made available my close-up photos of a turkey cervical. Click through the image for details. Enjoy!