Welcome Guest [Log In] [Register]






Shoot a firework rocket ~ Winners!
Make a forum zoo!

Welcome to The Round Table. We hope you enjoy your visit.


You're currently viewing our forum as a guest. This means you are limited to certain areas of the board and there are some features you can't use. If you join our community, you'll be able to access member-only sections, and use many member-only features such as customizing your profile, sending personal messages, and voting in polls. Registration is simple, fast, and completely free.


Join our community!


If you're already a member please log in to your account to access all of our features:

Username:   Password:
Add Reply
Extinct Animal Questions
Topic Started: Nov 26 2013, 10:24 PM (193,306 Views)
Incinerox
Member Avatar
Āeksiot Zaldrīzoti

Yi Qi
Mar 24 2016, 02:08 PM
I Raptus
Mar 24 2016, 11:32 AM
Did Macrauchenia really have a trunk? Some sources I've read said it didn't likely have the muscular support in its skull for a trunk.
The short answer is, we don't know yet. Some studies have propposed that they lacked a trunk based on the fact that their muscular insertions look very different from modern trunked animals. However we actually don't have anything living in the world with nasal insertions quite like the machraucheniids, and while different, their nasal cavities could very likely have supported a trunk.

So at this moment, any of the two onterpretations is equally likely.
To be fair, it wasn't that they were different.

They were absent.

Compare the skull of Macrauchenia:
https://www.gastondesign.com/store/images/uploads/macrauchenia-skull.jpg

To that of a tapir:
http://www.boneroom.com/uploads/4/8/1/1/48118243/s521972503441136676_p1269_i1_w338.jpeg

Or the saiga antelople:
http://www.izw-berlin.de/tl_files/images/Services/Skull%20of%20a%20male%20saiga.%20Photo%20R.%20Frey.jpg

Or the elephant seal:
https://upload.wikimedia.org/wikipedia/commons/4/4c/Northern_Elephant_Seal_Skull.jpg

It's weird that the biggest and most iconic examples, the elephants, do things backwards, with most of their muscle support being that broad bit under the nasal openings:
http://www.skullsunlimited.com/userfiles/image/variants_large_2967.jpg

Even then, there's still muscle support across the face.

Macrauchenia seems to lack anything of the sort, hence why the presence of a trunk in that genus has been pulled into question.

Honestly it's shaping up to be a mimic of everybody's favourite mainstream group of Jurassic sauropods, the diplodocids:
https://upload.wikimedia.org/wikipedia/commons/4/42/Kaatedocus_skull.png




Viavenator was a brachyrostran, like Carnotaurus itself, and unlike Majungasaurus. Simple enough question.
Edited by Incinerox, Mar 24 2016, 05:05 PM.
Offline Profile Quote Post Goto Top
 
heliosphoros
Member Avatar


Incinerox
Mar 24 2016, 04:57 PM
It's weird that the biggest and most iconic examples, the elephants, do things backwards, with most of their muscle support being that broad bit under the nasal openings:
http://www.skullsunlimited.com/userfiles/image/variants_large_2967.jpg

Reminds me of a dugong or manatee skull.
Offline Profile Quote Post Goto Top
 
Zoo Tycooner FR
Member Avatar
#Lithopédion

Well , Manatees closest living relatives are Proboscidae .
Offline Profile Quote Post Goto Top
 
Paleop
Member Avatar
Paleopterix

I've been on a hunt for information about the Alaskan therizinosaurus footprint, so far from what I've been able to gather the footprint is from the Cantwell Formation dating around 70 MYA meaning it likely coincided with some of the Prince Creek formation's fauna.

however I cannot find any information on the size of the prints. does anyone know how large these prints are?
Offline Profile Quote Post Goto Top
 
Incinerox
Member Avatar
Āeksiot Zaldrīzoti

Not only can I tell you that it's 23.1cm long, I can give you the paper itself:
[Linky link]
Edited by Incinerox, Mar 26 2016, 03:48 AM.
Offline Profile Quote Post Goto Top
 
BossMan, Jake
Member Avatar
Son of God

Based on tracks being about 9 inches (cause I'm American) I'd would think that it was no bigger then 15 feet, 20 feet at max. Based on information from other theropods.
Offline Profile Quote Post Goto Top
 
Luizo
Member Avatar
#MOREBADGES

I have a Question:

The andrewsarchus, was not found more fossils, because so far what appears on wikipedia is only found a skull from his hallmark discovery.
Offline Profile Quote Post Goto Top
 
Ztlabraptor211
Member Avatar


What part of that is a question?
Offline Profile Quote Post Goto Top
 
Even
No Avatar


I think he means to say whether Andrewsarchus has more remains already found, which sadly there are none of, even until now...
Offline Profile Quote Post Goto Top
 
Posted Image Guat
No Avatar


How much did Yutyrannus weigh?
Offline Profile Quote Post Goto Top
 
BossMan, Jake
Member Avatar
Son of God

Estimates range from 1000-3300 pounds or for you metric users
455-1500 KG

EDIT: So I saw this piece of art by Paleop and I was curious, what is the evidence for those spikes underneath the neck of the brontosaurus?

Posted Image
Edited by BossMan, Jake, Mar 29 2016, 02:23 PM.
Offline Profile Quote Post Goto Top
 
Posted Image Flish
Member Avatar


I was wondering the same, as that is not the only place I've seen those.
Offline Profile Quote Post Goto Top
 
CyborgIguana
Member Avatar


Something about the prong-like bones protruding from the bottom of the neck vertebrae IIRC, though don't quote me on that.
Offline Profile Quote Post Goto Top
 
Paleop
Member Avatar
Paleopterix

Quote:
 
EDIT: So I saw this piece of art by Paleop and I was curious, what is the evidence for those spikes underneath the neck of the brontosaurus?
Posted ImagePosted Image

brontosmash
let me summarize: the necks of apatosaurines were thickly muscled and likely had bony protrusions (bosses).
the spikes are a speculative expansion of the brontosmash.

also side note; I forgot to scale the stego at the time this was released, I will update that soon.
Offline Profile Quote Post Goto Top
 
Stan The Man
Member Avatar
Honorary Party Member

What are the best references to use for Concavenator? With the absence of our savoir Scott Hartman I've picked these images (I know atrox's has a shrinkwrapped skull).

Posted Image

Posted Image

Posted Image
Offline Profile Quote Post Goto Top
 
2 users reading this topic (2 Guests and 0 Anonymous)
ZetaBoards - Free Forum Hosting
Create your own social network with a free forum.
Go to Next Page
« Previous Topic · Extinct Animals & Evolution · Next Topic »
Add Reply