Here comes Santaposeidon!

December 22, 2009

Ever since we started working on Sauroposeidon, Rich Cifelli and I dreamed of seeing the reconstructed neck on display. That vision has come to fruition.

The Oklahoma Museum of Natural History opened a totally new building in 2000. Coincidentally, the opening ceremony for the new digs was held the same week that the paper naming Sauroposeidon came out in JVP. The exhibits in the new building were pretty cool right out of the gate, but the exhibit people have not been idle, and if you haven’t been there in a year or three you will find many things that you have not seen before.

My favorite upgrade is the new orientation gallery, which introduces museum visitors to the functions of the museum and the kinds of work that go on in the research wing, including most of the traditional -ologies. The reconstructed neck and head of Sauroposeidon hang from the ceiling, spanning most of the length of the gallery and extending out into the museum’s great hall.

The beast was reconstructed by Research Casting International. I got to visit their workshop in Ontario, Canada, a little over a year ago to see how things were coming along. The people there were extremely serious about getting things right (how refreshing!). We spent quite a while talking about how Sauroposeidon was different from Giraffatitan (RCI remounted the Humbolt dinos) and sketching out what the missing bits might have looked like, especially the skull.

Of course we don’t have any skull material from Sauroposeidon, but we do have skulls and partial skulls from several other basal titanosauriforms. Together with one of the people working on the Sauroposeidon project, I filled up a couple of pieces of paper with sketches showing what a slender mid-Cretaceous brachiosaur might have looked like. In particular, and in keeping with the gracility of the cervical vertebrae, we narrowed the skull a bit to get rid of the dreaded Giraffatitan Toilet-Bowl Head.

The completed neck and head were already mounted in the OMNH when I visited last Christmas, but the gallery wasn’t open yet so all I got–and all I could pass on to you–was this teaser. The new orientation gallery opened in the middle of this spring, so Sauroposeidon has been hanging out there for a while. This is just the first chance I’ve gotten to go see my baby.

What a fine present. Merry Christmas from the SV-POW!sketeers!

Update from Mike

Here is my Christmas card to you all.

Happy Christmas from Mike Taylor and brachiosauridae incertae sedis BMNH R5937, “The Archbishop”, coalesced dorsal vertebrae 8-9 (in right lateral view, like you need me to tell you that).  Image in part copyright (C) the Natural History Museum, but it’s the season of goodwill so they probably won’t sue you even if you send copies to all your friends.

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Click to titanosaurize. Trust me.

I was in Philadelphia a couple of weeks ago to work with Liguo Li, of Yongjinglong fame, and I took a day to run up to New York for a quick day’s work at the American Museum of Natural History. It was my first time visiting since the cast skeleton of Patagotitan went up, so it was my first chance to see that beast in the flesh (so to speak). The pano up top is mine, but the other two photos here are by Liguo. I’m writing with my thoughts on the mount.

Pros:

  • It’s big.
  • You can walk all the way around it, with no glass in the way.
  • It’s very convincing. The casting job on the real elements is superb, with all of the cracks and so on faithfully recorded. And the vertebrae they had to sculpt look pretty good.
  • The spotlights aimed at the neck cast these immense shadows of the cervical vertebrae on the far wall, which is cool (see below).
  • Now the AMNH has mounted skeletons of Brontosaurus (or some apatosaurine at any rate), Barosaurus, Kaatedocus (masquerading as a juvenile Barosaurus in the rotunda), and Patagotitan – that’s pretty not bad. I’m hard pressed to think of another museum in the Western Hemisphere with so many mounted sauropod skeletons. Carnegie, maybe? Someone help me out, here.

Cons:

  • In striking contrast to the well-lit, mostly-white aesthetic of the rest of the fossil halls, the orientation gallery holding Patagotitan is mostly in near-Stygian darkness. Shoot in HDR mode if you can.
  • The head poking out into the hallway is a nice trick (see also: Sauroposeidon at the Oklahoma Museum of Natural History), but it means that one of the focal bits of the animal is in a different lighting regime, which makes photography even trickier than it might otherwise have been.
  • The mount feels a bit…cramped by the geometry of the room. Of the AMNH mounted sauropods, it’s easily in the worst space. If you ask me, they should have dethroned Barosaurus from the rotunda (religious commitments notwithstanding) and put Patagotitan there. The Patagotitan mount that is going in Stanley Field Hall at the Field Museum is going to look much more impressive just because of the setting.

In all, not bad, could be better. It was fun for me because the longest cervicals of Sauroposeidon are veeerrry slightly longer than the longest of Patagotitan, and now that Sauroposeidon is coming out as a titanosaur in most analyses…it might have been friggin’ immense.

So, yeah, go see Patagotitan, and all the other good stuff on display at the AMNH.

For more posts on Patagotitan, see:

It’s that time of year…

December 22, 2017

This year Santaposeidon comes to you courtesy of OMNH vert paleo head preparator and 20th-level fossil conservation wizard Kyle Davies, who took the photo, composed the card, and gave me kind permission to share it here. Needless to say, we’re happy to pass on the happy holiday wishes to all of you, wherever you are and whenever you are reading this.

For previous Santaposeidon sightings, please see:

 

aquilops-display-omnh-dec-2016-1

I’m back in Oklahoma for the holidays, and anytime I’m near Norman I pop in to the OMNH to see old friends, both living and fossil. Here’s the Aquilops display in the hall of ancient life, which has been up for a while now. I got some pictures of it when I was here back in March, just never got around to posting them.

aquilops-close-up-omnh-dec-2016-2

Aquilops close up. You can’t see it well in this pic, but on the upper right is a cast of the Aquilops cranium with a prosthesis that shows what the missing bits would have looked like. That prosthesis was sculpted by – who else? – Kyle Davies, the OMNH head preparator and general sculpting/molding/casting sorceror. You’ve seen his work on the baby apatosaur in this post. I have casts of everything shown here – original fossil, fossil-plus-prosthesis, and reconstructed 3D skull – and I should post on them. Something to do in the new year.

ceratopsians-large-and-small-omnh-dec-2016-3

The Aquilops display is set just opposite the Antlers Formation exhibit, which has a family of Tenontosaurus being menaced by two Deinonychus, and at the transition between Early and Late Cretaceous. The one mount in the Late Cretaceous area is the big Pentaceratops, which is one of the best things in this or any museum.

pentaceratops-omnh-dec-2016-4

Evidence in support of that assertion. Standing directly in front of this monster is a breathtaking experience, which I highly recommend to everyone.

It’s just perfect that you can see the smallest and earliest (at least for now) North American ceratopsian adjacent to one of the largest and latest. Evolution, baby!

mammoth-santa-omnh-dec-2016-5

I didn’t only look at dinosaurs – the life-size bronze mammoth in the south rotunda is always worth a visit, especially in holiday regalia.

santaposeidon-omnh-dec-2016-6

No holiday post about the OMNH would be complete without a shot of “Santaposeidon” (previously seen here). I will never get tired of this!

The chances that I’ll get anything else posted in 2016 hover near zero, so I hope you all have a safe and happy holiday season and a wonderful New Year.

Giraffatitan skull photos

February 10, 2014

Giraffatitan skull left lateral

Let it never be said that we don’t take good care of our commenters. Heck, we’ll even degrade ourselves by blogging about theropods, if that’s what it takes to keep you all happy.

Giraffatitan skull left anterolateral

Derp dah durr

Today’s post is a response to this comment by Dean, asking for lateral view photos of the skull of Giraffatitan. Mike and I did get to spend some quality time with the T1 skull (a.k.a. “Old Toilet-Face”) when we were in Berlin in 2008.

Giraffatitan skull anterior

Unfortunately, most of our photos turned out not-so-hot. The room around the skull was not large, so we couldn’t get back very far from it. Hence our photos are plagued by perspective distortions.

Giraffatitan skull right anterolateral

Ah hurr hurr hurr

Also, we didn’t have a tripod along and the light level was fairly low, and the combination of handheld shots and long exposure times meant that most of the shots are at least a little blurry.

Giraffatitan skull right lateral

BUT. It was still a thrill to see that skull up close.

The crazy thing about Giraffatitan is that the skull looks like it’s going to be pretty sweet when you see it from the side. Because you’re thinking it’s going to be kinda narrow, like a giraffe’s head. Then you get even a partial front view and suddenly the animal’s whole skull looks like a partially-deflated whoopie cushion (whereas in life it looked like a mostly-inflated whoopie cushion). And then you have to live with the knowledge that one of the most majestic animals that ever lived on Earth was afflicted with derpty-face. I’ll bet they went extinct from shame.

Giraffatitan skull dorsal oblique

Still, there is some cool anatomy to see here, especially the snout-troughs leading down from the external nares, and the neurovascular foramina on the maxillae.

And, crucially, brachiosaurs had the good taste to hide their freakish countenances 45 feet up, where they could be safely ignored by everyone other than pterosaurs and birds. This has not escaped the notice of exhibit designers:

Giraffatitan skeleton hmmm

Go here for the unmarked original.

Here are two photos of what I infer to be C8 of OMNH 53062, the holotype of Sauroposeidon. The top one was taken by Mike during our visit to the OMNH in 2007. If you’re a regular you may recognize it from several older posts: 1, 2, 3. The bottom one was taken by Mike Callaghan, the former museum photographer at the OMNH, sometime in 1999 or 2000. I used it in Wedel et al. (2000) and Wedel and Cifelli (2005).

Sauroposeidon OMNH 53062 C8 photos compared

You’ll notice that the two photos are far from identical. In both cases, the photographers were up on ladders, as far above the vertebra as they could get, and there are still significant perspective effects. That’s just a fact of life when you’re taking photos of a vertebra that is 1.4 meters long, from anything lower than a helicopter. In Mike Taylor’s shot, the neural spine looms a little too large; in Mike Callaghan’s shot, the prezygapophysis looks a little too small, probably because it was curving off at the edge of the shot. So neither photograph is “right”; both distort the morphology of the specimen in different ways. Here’s how the two images stack up, with the outlines scaled to the same length:

Sauroposeidon OMNH 53062 C8 outlines compared

When I ran a draft of this post past Mike, he wrote (with permission to post):

I think the current draft misses an important point: the warning. We really can’t trust photos, however carefully taken, and however beautifully composited into TNFs*. You’re welcome to quote me as having said I’d have assumed the two C8s were different vertebrae. For that matter, I bet I could have worked up several taxonomically significant characters to distinguish them. Yikes.

* TNF = Taylor Normal Form, i.e., making multi-view photos like the ones here and here.

So the moral is, photos of big specimens almost always involve some distortion. This is clearly not ideal. But I have a plan for fixing it. I am hoping to get back to the OMNH this spring, and the next time I’m there, I’m going to take photos of this vertebra from a zillion angles and make a 3D model through photogrammetry. Happily, Heinrich Mallison has been producing a very helpful series of tutorials on that very topic over at dinosaurpaleo: 1, 2, 3, 4, with more on the way (I’ll update the links here later). Update: Don’t forget to check out Peter Falkingham’s (2012) paper in PE on making photogrammetric models with free software.

Armed with that model, it should be possible to produce a perspective-free lateral view image of the vertebra, to which all of the previous photos can be compared. I can’t use CT data because this vertebra has never been CTed; it’s too big to fit through a medical CT scanner, and probably too fragile to be packed up and shipped to an industrial CT machine like they used on Sue (not to mention that would require a significant chunk of money, which is probably not worth spending on a problem that can be solved in other ways).

So, photogrammetry to the rescue, or am I just deluding myself? Let me know what you think in the comments.

Finally, I should mention that the idea of superseding photographs with 3D photogrammetric models is not original. I got religion last week while I was having beers with Martin Sander and he was showing me some of the models he’s made. He said that going forward, he was going to forbid his students to illustrate their specimens only with photographs; as far as he was concerned, now that 3D models could be cheaply and easily produced by just about everyone, they should be the new standard. Inspiring stuff–now I must go do likewise.

Some previous posts on Sauroposeidon:

References

Pimp my ‘pod 2: haids

December 13, 2010

Here’s another dual-purpose post (part 1 is here), wherein I use some of Brian Engh’s cool art to riff on a related topic (with kind permission–thanks, Brian!). Back when he was first planning his awesome Sauroposeidon life restoration, Brian sent these head studies:

(Note that Brian’s ideas were still evolving at this point, and he roofed the nasal chamber with a keratinous resonating chamber instead of the inflatable sac seen in the finished product. I think both are plausible [not likely, just plausible] and look pretty rad, although the latter is obviously a lot more metal.)

I think these are dynamite, because they show that you can avoid “shrink-wrapped dinosaur syndrome” (SWDS) and still make an anatomically detailed, realistic-looking life restoration. SWDS is what I call the common convention in paleo-art of simply draping the skeleton–and especially the skull–in Spandex and calling that a life restoration. I think it’s a popular technique because you can show off the skeleton inside the animal and thereby demonstrate that you’ve done your homework (especially to an audience that already knows the skeletons*). It gives artists an easy way to add detail to their critters; if you actually slab on realistic soft tissues and lose most of those skeletal and cranial landmarks, you have to come up with something else to make your animals look detailed and visually interesting. And by now it’s been going strong for several decades, so people expect it.

* Without harshing on anyone, I suspect that a lot of consumers of paleo-art have spent more time looking at dinosaur skeletons than looking at live animals and thinking about how much or little of their skeletal structure is visible in life, which may make them susceptible to mistaking “shows a lot of the bony structure” for “biologically realistic”. I suspect that because it was true of me for a good chunk of my life; as usual, the one ranting is ranting mostly at his former self. What cured me was dissecting animals and reading TetZoo–happily, two avenues of self-improvement that are open to everyone.

In the second image above (the one showing the innards) Brian kindly credited me for lending a little assistance. That assistance was mainly in forwarding him my full cranio-centric anti-SWDS rant, which I originally put together for a certain documentary that ended up using almost none of my ideas. I’ve been meaning to recycle it here for ages, and Brian’s new art is just the kick in the pants I needed. Without further ado:

“Sauroposeidon head suggestions no labels.jpg” [above] shows a mock-up of the skull, a traditional restoration of the head, the skull with accurate soft tissues, and an updated restoration. The traditional restoration looks like a lot of paleoart from the past two decades–it looks like someone shrink-wrapped the skull. But this is not what the heads of real animals look like at all. If you look at almost any animal, whether it is a lizard, croc,* turtle, snake, bird, cow, horse, rodent, or human, you can’t see the holes in the skull because they are filled with muscles or air sacs and smoothed over with skin. Here are the 8 specific features I fixed in the updated restoration:

* I got a little carried away here–some of the holes in croc skulls are not hard to make out, because their skin is unusually tightly bound to the very rugose skull. Most dinosaurs didn’t have that same skull texture, and there is little reason to think that their heads were similarly shrink-wrapped. Abelisaurs, maybe. Sauropods, not so much.

(1) the profile of the top of the head and start of the neck would have been smoothed out by jaw muscles bulging through holes in the top of the head (strange but true), and by neck muscles coming up onto the back of the skull.

(2) The fleshy nostril should be down on the snout at the end of the nasal troughs. The bony nostrils make that huge hump on top of the head, but they are continuous with these two grooves that run down the front of the face, and almost certainly the whole bony-nostril-plus-groove setup was covered by soft tissues and the actual air holes were down on the snout. That fleshy covering would have been propped up and not sucked down tight to the skull, so you wouldn’t be able to see the boundaries of bony nostrils from the outside. The fleshy nostril should also be fairly big; it is unlikely that a 50-ton animal with a head a yard long had nostrils the size of a horse’s.

(3) The holes in the skull should not be visible. The habit of drawing and painting dinosaurs with shrink-wrapped heads is so entrenched that smooth heads look undetailed and a little fake, but smooth heads are undoubtedly more accurate. The head wasn’t necessarily a completely smooth bullet–it probably had decorative scales and patches of color–but we can be fairly certain that the holes in the skull were not visible through the skin.

(4) The jaw joint is all the way at the back of the head, but past the tooth row the upper and lower jaws were bound together by jaw muscles.  When the jaws opened, as shown in the lower images, the muscles were covered by skin. This skin might have been outside the jaws and stretchy, as shown in the attached image “bird cheeks.jpg”, or it might have been tucked in between the jaws as shown in “croc cheeks.jpg” [below].

Another caveat in my own defense: I know that condors do not have muscular, mammal-style cheeks, so the “cheek” skin here is doing more than just covering jaw muscles (farther back on the  jaw the skin is covering jaw muscles). Remember that I was writing quick art suggestions for a less technically sophisticated audience, not a dissertation on condor heads. The take home point is that you can’t tell from looking at the condor below where the jaw muscles start or where the jaw joint is located (unless you already know something about bird skulls). Other than the  gross outline, there simply isn’t much osteology on display–and this is a naked head!

(5) The eyes are usually reconstructed as small, dull, and centered in the vertical middle of the eye socket. In fact the eyes were probably located toward the top end of the eye socket, they were probably colorful as in most reptiles and birds, and they may have been pretty big. [But not that big; see Mickey’s comment below, and note that Brian got it right anyway.]

(6) The external ear hole is usually left out. It should be behind the back of the skull and in front of the hindmost jaw muscles.

(7) The profile of the back of the head follows jaw muscles, not the boundaries of the skull bones.

(8) Sauropods had true flip-top heads. The skull of Giraffatitan looks like nothing so much as an upside down toilet bowl, with the toilet seat for the lower jaw. Sauropods probably used that big gape to shove in as much plant material as possible per unit time. Crocodiles and many birds have an extensible throat pouch that allows them to bolt larger bites than you’d think, and the same was probably true of most dinosaurs, especially sauropods. There may have been a visible division between the muscular neck and this fleshy “gullet”. See “croc throat.jpg” and “bird throat.jpg” [below].

After seeing one of the preliminary designs for the documentary Sauroposeidon–which sadly ended up being a Big Gray Pachyderm in the show–I sent the following. Even though they ignored it, and even though it appears here as a rehash of an argument I’ve made several times already, I’m still proud of it. Especially the concluding advice–potential artistic collaborators take note!
I think you could safely put on a lot more color. People are used to big animals being dull, but that’s because most big animals are mammals and, except for primates, all mammals are effectively colorblind. So big mammals are a horrible guide to how colorful other big animals might be. Komodo dragons and crocs are both fairly dull, but they’re all ambush predators and they have to be dull or they don’t eat. If I get inspired I might take your Sauroposeidon into Photoshop and color it up; otherwise maybe have your artists look at tropical birds, toss back a couple of stiff drinks, and throw caution to the wind.

The ghost of Christmas past

December 25, 2008

santaposeidon-480

But also of Christmas future.

Or, perhaps, the spirit (pneuma) of the season.

Merry Christmas to all! We’ll see you back here in 2009.

Cheers,

The SV-POW!sketeers