Today, we bring you the long-overdue third installment in everyone’s  favourite Mystery Sauropod Dorsals serial, our trawl through the NHM’s collection of mostly isolated elements from the Wealden Supergroup. Many of these elements are too bashed up to be diagnostic (with the Xenoposeidon holotype R2095 being an honourable exception).

If you’re new to this thread, here’s a minimal reading list, in chronological order. I say ‘minimal’ because all of the relevant papers are freely available, and therefore all of the factual claims are easy to check.

Internal structure of a cervical vertebra of Sauroposeidon, OMNH 53062. A, parts of two vertebrae from the middle of the neck. The field crew that dug up the bones cut though one of them to divide the specimen into manageable pieces.

You know, we have not done what we intended with this blog. We intended to post pretty pictures of sauropod vertebrae, sketch a few lines of text a la our inspiration, and call it good. But not one of us is capable of shutting up –me least of all–so we sit down to write 6 lines and end up writing 60 or 600. Well, not this time.

Considering how much time I’ve spent playing around mounted sauropod skeletons, I cannot believe it never occurred to me to do this: This is the mounted Brachiosaurus skeleton in the United terminal at Chicago O’Hare.

This figure is stolen from Wedel et al. (2000:fig. 5). A shows the first 11 cervical vertebrae* of Sauroposeidon in articulation. B shows how the holotype specimen, OMNH 53062, must have disarticulated, and C shows it as it was found. Shaded vertebrae and bits of vertebrae were not found. The thickness of the cervical ribs is greatly exaggerated for clarity.

Mike and Darren and I correspond a LOT. Like people in any long-running friendship, we’ve developed a lot of private shorthand. We also share an inordinate fondness for acronyms. One of our favorites is POOP, Prioritized Ordering Of Projects. As in, “What piece of POOP are you working on now?” or “I’ll get back to you on that as soon as I get this load of POOP in the mail.” There are even subdivisions of POOP.

This one, obviously, is a follow-up to this one. Mark drew the picture, Mike had the idea, Mark gave the go-ahead, and here we are. Cry havoc and let slip the azhdarchids of war! Who’s next? Who wants some? You want a little? Huh?

Again, another exclusive peek at an interesting specimen: the MIWG.7306 vertebra, aka ‘Angloposeidon’ (Naish et al . 2004). Apologies if, by now, you’re bored of my show-casing of this specimen, but – not only is it the only sauropod vertebra of which I personally have multiple unpublished images – it is also a really nice demonstration of the fact that, even in just a single vertebra, there are multiple interesting, bizarre, and

It’s a lonely night here at the Fortress of Sauropoditude. Darren is off at one of his numerous conferences, and Mike is in hiding, trying to avoid the reality that 4% of a millennium has passed since he was loosed upon the world. I gave the serfs the night off, which means it’s just me here in this lonely tower, surrounded by arcane devices, mouldering tomes and piles of ancient bones.