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2 beams Diplodocus Carnegii

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2 Diplodocus, an adult male and a subadult are startled by a flock of Scaphognathine Pterosaurs as they move down out of the forest to seek water during the dry season of Late Jurassic Colorado.
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Image details
Image size
1800x675px 1.34 MB
KODAK EASYSHARE Z1012 IS Digital Camera
Shutter Speed
1/406 second
Focal Length
6 mm
ISO Speed
Date Taken
Jan 20, 2008, 11:50:50 PM
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anonymous's avatar
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grandesenigmes's avatar
Diplodocus is such an amazing creature. You are very talented. Check out this one:…
grisador's avatar
Diplodocus my favourite sauropod ! Awesome work here
StudioSpectre's avatar
grisador's avatar
You're very welcome ! Nice artworks :nod:
vasix's avatar
Ooohh...:) I like Diplodocus :meow: although I didn't realize that you were on DA until very, very recently...
StudioSpectre's avatar
Me too! Thanks, and no problem. I'm on here just in case, never hurts to post your art anywhere that might lead to future work ya know.
vasix's avatar
It does give you recognition of a sort...
StudioSpectre's avatar
In some ways I hate deviant art. Also, in some ways I despise facebook. Deviant art is wonderful for paleoart, and speculative biology and sci-fi art too. Just filled to the brim with any and all kinds of sillyness!
vasix's avatar
The silliness kinda makes it all the more worthwhile :D 
Sounder1995's avatar
Are they supposed to be sexually dimorphic in this picture? I know you said one's younger, but the color patterns appear too different to be attributable to age alone, in my opinion.
StudioSpectre's avatar
Age can be a powerful changer. I'm sure you've seen a baby crocodile, tapir, or a baby deer.
The large adult is definitely a male, the younger one's gender doesn't really matter, it's not really either, just a subadult. 
In an animal that may have lived upwards of 100 years, should be plenty of time to for skin patterns to change with constant shedding and alterations in the amounts of pigments displayed.
Sounder1995's avatar
I thought the 100 year lifespan was merely a leftover idea from before the dino Renaissance? I know that Sue the T. rex died around age 28, & by then, "she" was already an old "granny." Sure, Diplodocus is an R-strategy sauropod, but they're both still saurischians. Or is phylogenetic bracketing not appropriate here?
StudioSpectre's avatar
GREAT QUESTION, cause you actually made me look it up and check my info out, Good on you!
first off, You are asking the wrong guy!
From what I know, yes, Sue was 28 your correct, and diplodocus and Tyrannosaurus are both Saurischian. But lets extrapolate that to mammals, or even primates. We can live 30-100 years, 30-50 pre scientific revolution. So that's homo sapiens, but lets compare that to a really close relative, A marmoset monkey which I would 'guess' is at least as closely related to us as a Sauropod is to a Therapod (again, not personally a scientist). The marmoset lives only around 12-15 years on average. Pretty decent difference for two closely related animals.

With a little googling, I found that the best hard data on a Sauropod age was a 48 year old Apatosaur, I don't have the citation handy, but I'm asking around.

What I do know is the huge issue is sample size, we have such a limited amount of individuals to study from. If we looked at modern day African elephant carcasses, say the bones fossilized. We would have examples of individuals who died when they were fully grown at 20, or at 30, and at 40, and maybe at 80. It can depend on so many things as to when and why an animal dies, it's hard to really know unless you have a lot of individuals to study from. 
If I find out more I'll pass it along. 
Sounder1995's avatar
Oh wow. Thanks for all the info! Regardless of what age sauropods may have been able to live to though, they would've reached sexual maturity rather quickly though, given that large dinosaurs in general grew rapidly and reached sexual maturity before reaching full size.

(…; Yes, I know I'm citing Wikipedia!)

Given that Diplodocus was an R-strategy prey animal, it would've had even more evolutionary incentive to reach sexual maturity as rapidly as possible, since that's pretty much its only defense against being eaten & going extinct. Based on modern animals' color schemes, I'm going to assume that their color scheme stops changing upon reaching sexual maturity, aside from the breeding season & old age. So a sub-adult Diplodocus might already be sexually mature, and if not, it would become so very soon.

Given all this, I think it's plausible that the younger Diplodocus could also be a male, but if so, he would be adapting the more mature color scheme very rapidly at this point in his life. What do you think? Sorry if I sounded overly critical in this comment.
StudioSpectre's avatar
Your only asking questions and I don't feel that is being overly critical. I like to talk about my art :)
So yes, getting big and fast was almost certainly the plan for them. 
I would guess that different size levels of adults could reproduce, from small, medium, huge and super huge, likely the olddest the largest.
The real difference would have been in how they reproduced, or rather their (lack of) parental care. 
I'm a believer that they are possibly like a giant land sea turtle depositing eggs everywhere like its a numbers game for them
Then the sauropodlets would naturally probably need to look different since they probably had to act and behave differently until they reached hugeness, if they were lucky enough. 
vasix's avatar
Well...male...I might think male I guess. After all, teen pregnancy was pretty much normal for dinosaurs...anyway we know that sauropods might have nested mainly in groups, at least that's what we get from the Auca Mahuevo saltasaur nesting grounds but then again, R-strategists so minimal to no care for the young. I'm okay believing that's a teenager of either gender anyway...I think the Berlin Giraffatitan is of a teenager at about three-quarters adult size or something, as far as I remember. Anyhow an Apatosaurus growth study I noticed mentioned a five tons per year growth rate. 

Dammit I hope I'm not rambling...
StudioSpectre's avatar
It's a teenager, gender indeterminant. It's not likely sauropods cared much for young at first, not until they were large enough to not be stomped on. 
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fishofglass's avatar
i cannot but admire your talented!
roco6699's avatar
Very nice composition
StudioSpectre's avatar
Thank you very much! I got a lot of help from my friends!
anonymous's avatar
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