HOME | DD
GetAwayTrike — Lancian helmets
Published: 2017-09-30 04:09:35 +0000 UTC; Views: 6940; Favourites: 120; Downloads: 0
Redirect to original
Description
Top to bottom,Pachycephalosaurus wyomingensis AMNH 1696 (holotype of P. "grangeri"; adult).
?Pachycephalosaurus sp. NMNS specimen ("Sandy"; subadult).
"Stygimoloch spinifer" MPM 8111 (subadult),
"Dracorex hogwartsia" holotype TCMI 2004.17.1 (large juvenile),
"William's ranch pachycephalosaur".
Scale bar is 1m.
Related content
Comments: 21
Did I measured it wrong or is the adult Pachy 6 meters in length?
👍: 0 ⏩: 1
I measured: ~6 m standing length, probably ~6.5 m along the centra (roughly, I haven´t measured the pixels).
Quickly drew an improvised chart and Pachy is bloody humongous.
👍: 0 ⏩: 1
Ohh, it's much larger them i thought I imagined 4,5/5 meters
👍: 0 ⏩: 2
Late update: I measured the pachys more accurately, in straight lines to get better results. And I just felt like scaling some pachys.
Pachycephalosaurus wyomingensis AMNH 1696 (holotype of P. "grangeri"; adult). = 6 meters long, 1.75 m tall (hip)
?Pachycephalosaurus sp. NMNS specimen ("Sandy"; subadult). = 4.5 meters long. (probably the size of the commonly cited 4.5 meters for Pachycephalosaurus)
"Stygimoloch spinifer" MPM 8111 (subadult), = 4.2 meters long
"Dracorex hogwartsia" holotype TCMI 2004.17.1 (large juvenile),= 4.85 m long-
"William's ranch pachycephalosaur". = 2.55 m long, scaled with Dracorex.
(And Alaskacephale seems to be 1.83 meters long based on this Pachycephalosaurus skeletal) (And Spaerotholus buchholtzae seems to be ~1.12 meters long)
👍: 0 ⏩: 1
The "new" size of Pachycephalosaurus is interesting since it is a good size for a herbivore intermediate between larger Triceratops & Friends and smaller ones like Thescelosaurus an Anzu*, fits better in the environment. Dakotaraptor doesn't approve that :/
👍: 0 ⏩: 2
Actually, all Pachycephalosaurs are omnivores, because they had sharp teeth in the front bills, but flat teeth in the cheek parts of their mouths.
👍: 0 ⏩: 0
What does the asterix next to Anzu denote?
👍: 0 ⏩: 1
Cause it is an omnivore, I forgot the ornithomimid it would also had an asterix.
👍: 0 ⏩: 0
I also thought that.
👍: 0 ⏩: 0
The Stygimoloch holotype actually shows signs of being an adult that underwent skull ontogeny previously.
👍: 1 ⏩: 1
Dracorex tho is definitely a juvenile.
👍: 0 ⏩: 1
A juvenile of a separate Stygimoloch species probably, it's larger than the more mature MPM 8111 at least in skull length lol.
👍: 1 ⏩: 2
We have Torosaurus skull of a subadult bigger than most of the mature..
This is not a super true rule with living being.
The MPM specimen is highly incomplete so se can t determinate the exact size of the skull.
Still you could be right...
👍: 0 ⏩: 1
"We have Torosaurus skull of a subadult bigger than most of the mature..."
You mean the MOR skulls that have nasal bosses? I'm agreed with Nima on the idea of "Torosaurus magnus".
"This is not a super true rule with living being."
It's not always followed, but assuming the exception isn't the most parsimonious option unless we have enough evidence to show it as an exception. Generally, juveniles tend to be smaller than adults (MPM 8111 has no external sutures and post-metaplasia erosion) from the same species.
"The MPM specimen is highly incomplete so se can t determinate the exact size of the skull."
True, but then it's also scales larger than Sandy at least here(which is probably a Stygimoloch IMO, it has significant cranial horns rather than Pachycephalosaurus' knobs).
"Still you could be right..."
👍: 0 ⏩: 1
As for Camarasaurus supremus and C.lentus there aren t strong morphological difference between the MOR Torosaurus and other specimens, and the horn boss could be a taphonomic artifact.
Humans, sa other animal, clearly show the fallacity of the size rule:
A lot of sons Are taller than they mother when they Are still not fully grown.
I know Nima argued some good point against but The Pachycephalosaurus ontogeny is still a relatively strong thesis in the hell Creek.
👍: 0 ⏩: 1
"Humans, sa other animal, clearly show the fallacity of the size rule:
A lot of sons Are taller than they mother when they Are still not fully grown."
Those are teenage sons being taller than their mothers. I don't think I've seen or heard of many cases of things like 8-year old children taller than their parents lol.
👍: 0 ⏩: 1
Still noto fully mature bsed in their skeleton
👍: 0 ⏩: 0
Nice work.
These animals are such a mess with the ontogeny / separate species debate....
👍: 0 ⏩: 0
Very nice stuff. It's a pity we see so few postcranial remains of these animals
👍: 0 ⏩: 0
