Sauroposeidon and friends

February 24, 2014

Sauroposeidon and kin cervicals - DRAFTAs a break from photography posts, here are four pretty big vertebrae that swirl in the same thought-space in my head. All are shown to scale, in right lateral view. These are not the biggest sauropod cervical vertebrae–Supersaurus beats them all, and there are vertebrae of Puertasaurus, Alamosaurus, and Futalognkosaurus that rival the big Sauroposeidon vert, but those are either less well preserved or still awaiting detailed description.

Incidentally, I think BYU 12867 is a C10. The centrum proportions are about right, compared to Giraffatitan, and the neural spine looks good, too, like a geometric transformation of the big Giraffatitan C8. Also, the drawn-in prezyg outline for MIWG.7306 is a little short; the actual prezyg is a monster and would have overhung the condyle by another 10cm or so. I’m pretty sure that we had a composite photograph showing this at one point, but irritatingly none of us can find it at the moment. If it turns up, I’ll update the image.

For a long time I thought Sauroposeidon was a brachiosaurid. Now it seems to be a somphospondyl (D’Emic 2012) or possibly even a basal titanosaur (Mannion et al. 2013), even if we stick just to the holotype. But if it’s not a brachiosaurid, it’s cervical vertebrae are at least coarsely brachiosaur-y in outline.

You  may recall from Naish et al. (2004) that MIWG.7306 shares several derived characters with the holotype vertebrae of Sauroposeidon. Does that mean that Angloposeidon is a somphospondyl or titanosaur as well? I dunno–as always, we need more material–but it’s an interesting possibility.

References

chaos_gigantes_by_algoroth-d3ljhww

This beauty is by Bryan Riolo, aka Algoroth on DeviantART, who also let me use his giant space Cthulhu for my Collect Call of Cthulhu over on Echo Station 5-7. Update: and here, belatedly, is a link to the piece on DA, with Bryan’s thoughts on it.

I love the sense of scale here, with paralititans striding through the surf, the chiaroscuro, and the sheer amount of stuff going on. It reminds me of William Stout’s murals, and lots of atmospheric classic paintings. Sure, there’s a theropod getting his guts rearranged, which I’m always up for, but that’s literally just a sidelight (or sidedark?) in this epic image. In short, I’m diggin’ the art in this paleoart.

For more sauropods stomping theropods, see:

And if your definition of ‘stomping’ encompasses pooping on, vomiting at, and blowing away with sheer awesomeness, you may also enjoy:

Mark Witton, pterosaur-wrangler, Cthulhu-conjurer, globe-trotting paleo playboy and all-around scientific badass, drew this (and blogged about it):

Buzzed small

I liked it, but I thought it could use some color, so I hacked a crude version in GIMP and sent it to Mark with a, “Hey, please put this on a t-shirt so I can throw money at you” plea. Lo and behold, he did just that.

Buzzed for Wedel - 480

You can get your own from Mark’s Zazzle store. And apparently he will have more sauropod-themed merch coming soon.

Brian Engh: Stomp time!

September 16, 2013

FutalognkosaurusStompingWebBecause “here’s that Brian Engh sketch of a sauropod literally stomping the guts out of a theropod you ordered” was a bit ungainly for a post title.

Here we have Futalognkosaurus sporting some speculative soft tissues, smooshing some very non-speculative soft tissues out of SeriouslywhogivesacrapwhatitisImjustgladitsdyingvenator. If you just look at the theropod’s face and not the…other stuff, you can imagine that maybe it is laughing. “Oh, ha-ha, you found my tickle spot! Hahaha, stop it! HAHAHA TOO MUCH AAIIIIEEEE–” Schploorrchtbp!!

Futalognkosaurus is clearly saying, “…and I thought they smelled bad on the outside.”

Brian drew this just because we’ve been living up to our mandate lately and posting pictures of sauropod vertebrae. So clearly we gotta do more of that.

For more posts with Brian’s art, go here.

LACM dino camp 3 - Mamenchisaurus and Triceratops 1

Last night London and I spent the night in the Natural History Museum of Los Angeles County (LACM), as part of the Camp Dino overnight adventure. So we got lots of time to roam the exhibit halls when they were–very atypically–almost empty. Above are the museum’s mounted Triceratops–or one of them, anyway–and mounted cast of the Mamenchisaurus hochuanensis holotype, presented in glorious not-stygian-darkness (if you went through the old dino hall, pre-renovation, you know what I mean).

LACM dino camp 1 - dueling dinos

We got there early and had time to roam around the museum grounds in Exposition Park. The darned-near-life-size bronze dinos out front are a minor LA landmark.

LACM dino camp 2 - fountain

The rose garden was already closed, but we walked by anyway, and caught this rainbow in the big fountain.

LACM dino camp 4  - Mamenchisaurus and Triceratops 2After we checked in we had a little time to roam the museum on our own. I’ve been meaning to blog about how much I love the renovated dinosaur halls. The bases are cleverly designed to prohibit people touching the skeletons without putting railings or more than minimal glass in the way, and you can walk all the way around the mounted skeletons and look down on them from the mezzanine–none of that People’s Gloriously Efficient Cattle Chute of Compulsory Dinosaur Appreciation business. Signage is discreet and informative, and so are the handful of interactive gizmos. London and I spent a few minutes using a big touch-screen with a slider that controlled continental drift from the Triassic to the present–a nice example of using technology to add value to an exhibit without taking away from the real stuff that’s on display. There are even a few places to sit and just take it all in. That’s pretty much everything I want in a dinosaur hall.

Also, check out the jumbotron on the left in the above photo. It was running a (blessedly) narration-free video on how fossils are found, collected, prepared, mounted, and studied, on about a five-minute loop. Lots of pretty pictures. Including this next one.

LACM dino camp 5 - big ilium photo

There are a couple of levels of perspective distortion going on here, both in the original photo and in my photo of that photo projected on the jumbotron. Still, I feel confident positing that that is one goldurned big ilium. I’m not going to claim it’s the biggest bone I’ve ever seen–that rarely ends well–but sheesh, it’s gotta be pretty freakin’ big. And apparently a brachiosaurid, or close to it. Never mind, it’s almost certainly an upside-down Triceratops skull. Thanks to Adam Yates for the catch. I will now diminish, and go into the West.

LACM dino camp 6 - ceratopsian skulls

Triceratops, Styracosaurus, and Einiosaurus–collect the whole set!

LACM dino camp 7 - tyrants

Of course, the centerpiece of the second dinosaur hall–and how great is it that there are two!?–is the T. rex trio: baby, juvenile (out of frame to the right), and subadult. Yes, subadult: the “big” one is not as big as the really big rexes, and from the second floor you can see unfused neural arches in some of the caudal vertebrae (many thanks to Ashley Fragomeni for pointing those out to me on a previous visit).

LACM dino camp 8 - baby rex

Awwwww! C’mere, little fella!

LACM dino camp 9 - pneumatic diplodocid caudals

Still, this ain’t Vulgar Overstudied Theropod Picture of the Week. Here are some sweet pneumatic diplodocid caudals in the big wall o’ fossils (visible behind Mamenchisaurus in the overhead photo above). The greenish color is legit–in the Dino Lab on the second floor, they’re prepping a bunch of sauropod elements that look like they were carved out of jade.

Sculpey allosaur claws

Sudden violent topic shift, the reason for which will be become clear shortly: London and I have been sculpting weapons of mass predation in our spare time. In some of the photos you may be able to see his necklace, which has a shark tooth he sculpted himself. Here are a couple of allosaur claws I made–more on those another time.

LACM dino camp 10  - molding and casting

The point is, enthusiasm for DIY fossils is running very high at Casa Wedel, so London’s favorite activity of the evening was molding and casting. Everyone got to make a press mold using a small theropod tooth, a trilobite, or a Velociraptor claw. Most of the kids I overheard opted for the tooth, but London went straight for the claw.

LACM dino camp 11 - raptor claw mold

Ready for plaster! Everyone got to pick up their cast at breakfast this morning, with instructions to let them cure until this evening. All went well, so I’ll spare you a photo of this same shape in reverse.

LACM dino camp 12 - Camp Wedel in the African bush

We were split into three tribes of maybe 30-40 people each, and each tribe bedded down in a different hall. The T. rex and Raptor tribes got the North American wildlife halls, but our Triceratops tribe got the African wildlife hall, which as a place to sleep is about 900 times cooler. Someone had already claimed the lions when we got there, so London picked hyenas as our totem animals.

LACM dino camp 13 - London with ammonite

Lights out was at 10:30 PM, and the lights came back on at 7:00 this morning. Breakfast was out from 7:15 to 8:00, and then we had the museum to ourselves until the public came in at 9:30. So I got a lot of uncluttered photos of stuff I don’t usually get to photograph, like this ammonite. Everyone should have one of these.

LACM dino camp 14 - Wedel boys with Carnotaurus

London’s favorite dino in the museum is Carnotaurus. It’s sufficiently weird that I can respect that choice.

LACM dino camp 15 - London with rexes

Not that there’s anything wrong with the old standards, especially when they’re presented as cleanly and innovatively as they are here.

LACM dino camp 16 - Matt with Argentinosaurus

Finally, the LACM has a no tripod policy, and if they see you trying to carry one in they will make you take it back to your car. At least during normal business hours. But no one searched my backpack when we went in last night, and I put that sucker to some good use. Including getting my first non-bigfoot picture of the cast Argentinosaurus dorsal. It was a little deja-vu-ey after just spending so much time with the giant Oklahoma Apatosaurus–elements of the two animals really are very comparable in size.

If you’re in the LA area and interested in spending a night at the museum–or at the tar pits!–check out the “Overnight Adventures” page on the museum’s website. Cost is $50 per person for members or $55 for non-members, and worth every penny IMHO. It’s one of those things I wish we’d done years ago.

So, this happened today

March 28, 2013

Big Bend Alamosaurus cervical J with Matt for scale

As I noted in a comment on the previous post, titanosaurs have stupid cervicals.

As evidence, here is as gallery of titanosaur cervicals featured previously on SV-POW!.

1. From Whassup with your segmented lamina, Uberabatitan ribeiroi?, an anterior cervical of that very animal, from Salgado and Carvalho (2008: fig. 5). As well as the titular segmented lamina, note the ridiculous ventral positioning of the cervical rib. It’s like it’s trying to be Apatosaurus, but it just doesn’t have the chops.

uberabatitan-cervicals-copy

2. From Mystery of the missing Malawisaurus vertebra, this alleged vertebra of that taxon from Jacobs et al. (1993:fig. 1), which completely fails to resemble all the other cervicals subsequently described from Malawisaurus (see the earlier post for details). Note the crazy sail-like neural spine and super-fat parapophyseal stump.

malawisaurus-1993

3. From Futalognkosaurus was one big-ass sauropod, this completely insane posterior cervical vertebra of Futalognkosaurus in right anterolateral view, with Juan Porfiri (175 cm) for scale. It’s super-tall — much taller than it is wide, and seemingly taller than it is long.

Posterior cervical vertebra of Futalognkosaurus in right anterolateral view; Juan Porfiri (175 cm) for scale

4. From Ch-ch-ch-changes, cervical 11 of Rapetosaurus, from Curry Rogers (2009:fig. 5). Notice how tiny the centrum is compared with the tall superstructure, and how the neural spine has such a distinct peak. Weird.

Rapetosaurus cervical

5. From Talking about sauropods on The Twenty-First Floor, cervical 9 of the same Rapetosaurus individual, from Curry Rogers (2009:fig. 9). The neural spine is a completely different shape from that of C11, but that is presumably mostly due to damage. One of the interesting things here is the apparent lack of pneumatic foramina in the centrum. They’re there somewhere: Curry Rogers (2009:1054) writes “In cervical vertebrae 9, 11, and 12, the centrum bears an elongate shallow pneumatic fossa with two anterior pneumatic foramina surrounded by sharp, lip-like boundaries.” But they are hard to make out! 

CurryRogers2009-rapetosaurus-fig9-C9

The meta-oddity here is that the cervicals of the four titanosaur genera pictures here are all so different from each other. What does this mean?

Probably only that Titanosauria is a huge, disparate, long-lived clade that encompasses far more morphological variation than (say) Diplodocidae. It’s a truism that we don’t, even now, really have a handle on titanosaur phylogeny — every new study that comes out seems to recover a dramatically different topology — so our perception of the clade is really as a big undifferentiated blob. In contrast, the division of Diplodocoidea into Rebbachisaurids, Dicraeosaurids and Diplodocids (plus some odds and ends) is nicely established and easy to think about.

So. Lots of work to be done on titanosaurs.

References

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