March 8, 2014
As I noted last time, I had a reason for going through the SV-POW! search logs. Inspired by a feature at Math with Bad Drawings, I’m going to interpret unusual or interesting search terms as questions, and answer them here.
brachiosaurus vs brontosaurus. Brachiosaurus wins on mass, height, not being a junior synonym, general awesomeness and probably length. Brontosaurus wins on date of naming. Despite this imbalance, if it came to a fight, my money would be on the Brontosaurus: it’s just insanely robust compared with pretty much all other sauropods. If they got into a neck-bashing contest (as giraffes sometimes do), it would kick Brachiosaurus‘s butt.
how long is a supersaurus. Lovelace et al. (2008:542) said of the WDC specimen “Jimbo” that “Supersaurus was neither the heaviest nor the longest sauropod, although it is well enough known to place confidence in its estimated length of 33-34 meters, and mass of 35-40 tons.” That rather modest length is only a quarter as long again as Boring Old Diplodocus (hereafter BOD), and doesn’t chime well with Matt’s estimate of 13.3-16.2m for the neck alone of the BYU specimen (Wedel 2007:195-197). That neck is, conservatively, 7 m longer than the neck of BOD, which would make the total body length 34 m even if the torso and tail were identical to those of BOD! Either someone made a mistake, or the two specimens are significantly different sizes.
gross neck bird. We don’t have any of those: all bird necks are beautiful, at least once divested of soft tissue. (Though we’d admit that the neck of a flamingo is weird.)
breviparopus skeleton real. Ha, we wish!
cannot login jstor. Yes, it’s a very common problem. Two years ago, we calculated that five people every second are denied access to JSTOR.
images of sauripasidan. Learn to spell. A certain amount of room for error is reasonable, but four incorrect vowels in a single word suggests someone who’s not even trying.
how did a plateosaurus act. You’d need to ask Heinrich Mallison about that.
does a crocodile has eye under his neck. Nuh-uh.
skeleton made from drinking straws. An excellent idea, but not one that we’ve attempted. Perhaps this year when Matt’s over in the UK for SVPCA, we’ll try a drinking-straw-skeleton challenge. Or perhaps we should get a whole bunch of packets, hand them out on the opening night of SVPCA, and let that be the ice-breaker.
cool heart made out of pincel led. This would make a good name for a progressive rock album.
- Lovelace, David M. Scott A. Hartman and William R. Wahl. 2008. Morphology of a specimen of Supersaurus (Dinosauria, Sauropoda) from the Morrison Formation of Wyoming, and a re-evaluation of diplodocid phylogeny. Arquivos do Museu Nacional, Rio de Janeiro 65(4):527-544.
- Taylor, Michael P., and Mathew J. Wedel. 2013. Why sauropods had long necks; and why giraffes have short necks. PeerJ 1:e36. doi:10.7717/peerj.36
- Wedel, Mathew J. 2007. Postcranial pneumaticity in dinosaurs and the origin of the avian lung. Ph.D dissertation, Integrative Biology, University of California, Berkeley, CA. Advisors: Kevin Padian and Bill Clemens. 290 pages.
March 7, 2014
A while back, Matt mentioned some of the surprising search-terms that lead people to SV-POW!. For reasons that will shortly become clear, I was checking out what’s being searched for now, and I thought I may as well issue this update. Here are the all-time top ten:
It’s nice to see good old Brachiosaurus up there at the top: a proper sauropod, and possibly my favourite (not counting the two that I’ve named myself, and which I have an obvious special affection for). But then you have to drop down to number six before you hit another sauropod (Sauroposeidon). Those top two sauropods are reasonable: we’ve written a lot about them here. The third top sauropod is Amphicoelias fragillimus, which is more surprising as we’ve not written that much about it. I guess it just reflects a lot of interest in that beast. Boring old Diplodocus is the fourth and last sauropod in the top ten. The next few are Argentinosaurus (#11), Amphicoelias (#12), Giraffatitan (#16). Apatosaurus (#18)
Unsurprisingly, SV-POW! itself crops up twice in the top ten: once as “svpow” (#8) and once as “sv pow” (#10). It’s also #15 as “sv-pow”.
Meanwhile, four of the top five slots are still held by terms that have nothing to do with sauropods. “Rabbit” can only be due to this post on sauropod neck posture; “Leopard seal” is due to the inclusion of a single sensational (but off-topic) photo in a post on Cetiosaurus nomenclature. “Basement” is another one-hit wonder, thanks to a poorly located Mamenchisaurus cast. “Flamingo” is more of a mystery. I think it must be due to the passing flamingo in the classic Necks Lie post.
Other oddities include “twinkie” at #17, “shish kebab” at #25, “corn” at #34, “corn dog” at #42 and “corn on the cob” at #77 (probably all due to the same post on sauropod neck fatness). Rather sadly, “big ass” comes in at #89. I doubt that the 602 people who came here by searching for that found what they were looking for.
Wedel, M.J., and Taylor, M.P. 2013. Neural spine bifurcation in sauropod dinosaurs of the Morrison Formation: ontogenetic and phylogenetic implications. Palarch’s Journal of Vertebrate Palaeontology 10(1): 1-34. ISSN 1567-2158.
March 1, 2014
Christine Argot of the MNHN, Paris, drew our attention to this wonderful old photo (from here, original caption reproduced below):
I found a different version of what seems to be the same photo (greyscaled, lower resolution, but showing more of the surrounding area) here:
What we have here is a truly bizarre mount of Diplodocus – almost certainly one of the casts of the D. carnegii holotype CM 84 — with perfectly erect, parasagittal hind-limbs, but bizarrely everted elbows.
There are a few mysteries here.
First, where and when was this photo taken? Christine’s email described this as a “picture of a Diplodocus cast taken in St. Petersburg around 1920″, and the caption above seems to confirm that location; but then why is it copyright the Paleontological Museum, Moscow? Since the web-site in question is for a Swedish museum, it’s not forthcoming.
The second photo is from the web-site of the Borisyak Paleontological Institute in Moscow, but that site unfortunately provides no caption. The juxtaposition with two more modern Diplodocus-skeleton photos that are from its own gallery perhaps suggest that the modern mount shown in the more recent photographs is a re-pose of the old mount in the black-and white photo. If so, that might mean that the skeleton was actually in Moscow all along rather than St. Petersburg, or perhaps that it was moved from St. Petersburg to Moscow and remounted there.
Does anyone know? Has anyone out there visited the St. Petersburg museum recently and seen whether there is still a Diplodocus skeleton there? If so, is it still mounted in this bizarre way? Better yet, do you have photos?
The second question of course is why was this posture used? This pose makes no sense for several reasons — one of which is that even if Diplodocus could attain this posture it would only serve to leave the forefeet under the torso in the same position as erect forelimbs would have them. The pose only makes any kind of sense at all if you imagine the animal lowering its torso to drink; but given that it had a flexible six-meter-long neck, that hardly seems necessary.
Of course Diplodocus does have a history of odd postures: because of the completeness of the D. carnegii holotype, it became the subject of the Sauropod Posture Wars between Tornier, Hay and Holland in the early 20th Century. Both Tornier (1909) and Hay (1910) favoured a sprawling posture like that of lizards (see images above and below), and were soundly refuted by Holland
But the Tornier and Hay postures bear no relation to that of the mounted skeleton in the photographs above: they position the forefeet far lateral to the torso, and affect the hindlimbs as well as the forelimbs. So whatever the Russian mount was doing, I don’t think it can have been intended as a representation of the Tornier/Hay hypothesis.
But it gets even weirder. Christine tells me that “I’m aware of [...] the tests that Holland performed on the Russian cast to get rid of the hypothesis suggesting a potential lizard-like posture. So I think that he would have never allowed such a posture for one of the casts he mounted himself.” Now I didn’t know that Holland had executed the mounting of this cast. Assuming that’s right, it makes it even more inexplicable that he would have allowed such a posture.
Or did he?
Christine’s email finishes by asking: “What do you think? do you think that somebody could have come behind Holland to change the position? do you know any colleague or publication who could mention this peculiar cast and comment its posture?”
Can anyone help?
- Hay, Oliver. P. 1910. On the manner of locomotion of the dinosaurs, especially Diplodocus, with remarks on the origin of birds. Proceedings of the Washington Academy of Sciences 12(1):1-25.
- Holland, W. J. 1910. A review of some recent criticisms of the restorations of sauropod dinosaurs existing in the museums of the United States, with special reference to that of Diplodocus carnegiei in the Carnegie museum. American Naturalist 44:259-283.
- Nieuwland, Ilja. 2010. The colossal stranger. Andrew Carnegie and Diplodocus intrude European Culture, 1904–1912. Endeavour 34(2):61-68.
- Tornier, Gustav. 1909. Wie war der Diplodocus carnegii wirklich gebaut? Sitzungsbericht der Gesellschaft naturforschender Freunde zu Berlin 4:193– 209.
February 27, 2014
I’m pretty certain this is the dorsal vertebra that’s been on exhibition in Paris for some time, and which is part of the holotype of Rebbachisaurus garasbae, which is in turn the type specimen of Rebbachisaurus and so of Rebbachisauridae as a whole. In which case it’s pretty darned important as defining a major group of sauropods.
This specimen was initially described, very briefly and without illustrations, by Lavocat (1954). The species (though a different specimen) was given a slightly better treatment by Russell (1996), as part of a larger work on isolated dinosaur bones. Russell included some line-drawings of the material (his figures 29-31), of which the pick is definitely this one of the bottom part of a dorsal vertebra:
As noted by Russell (p388), this vertebra is similar, but not identical, to the one in Wilson’s photo. Russell says of his specimen that “the greater length of the centrum relative to the height and width of the intercentral articulations and less steeply projecting transverse processes imply that the vertebra occupied a more anterior position in the column.”
Will Rebbachisaurus ever get the detailed treatment that such gorgeous material deserves? Yes! here’s another tweet from Jeff:
Rebbachisaurus is submitted; Ronan and I start work next Summer on Nigersaurus remains housed in Paris and Chicago.—
Jeff Wilson (@diapophysis) February 11, 2014
Fantastic to think that Rebbachisaurus is in the works, and Nigersaurus to follow! Happy days!
- Lavocat, R. 1954. Sur les Dinosauriens du continental intercalaire des Kem-Kem de la Daoura. [On the dinosaurs of the Continental Intercalaire of the Kem Kem of the Daoura].Comptes Rendus 19th Intenational Geological Congress 1952 (1):65-68. [English translation]
- Russell, D.A. (1996). Isolated dinosaur bones from the Middle Cretaceous of the Tafilalt, Morocco. Museum Natl. d’Histoire Nat. (Paris) Bull. Ser. 4 18 (Section C, Nos. 2-3), 349-402.
February 25, 2014
Hey, remember this? Your bound-for-PeerJ manuscript is like our Mauritian friend here, and the March 1 deadline is approaching like a hungry sailor with a club. So if you still want a voucher, let me know ASAP.