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Flat/flat verts?


Peace river rat

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I find quite a few verts that are flat on both sides. How many critters, besides cetaceans are flat on both sides? Thanks.

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3 hours ago, ynot said:

I think most mammals have flat vertebrae.

I seem to find a broad range of combinations between flat/concave/convex.

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Mammals in general can't really be characterised by having flat/acoelous vertebrae.

 

Here's a picture of the different types of vertebrae centra there are. Many different animals have different configurations. Finding a vertebra with a certain type may not always give you a good indication as to what group of animals it belongs to. Some animals also have different types of vertebrae in different parts of their bodies.

6efb61689d54a9c8cb8093c83aa1a837.png

 

For example, here are a few fossils from my collections from different groups. Some types of vertebrae appear in many groups, while some appear in some groups at all.

 

An Opistocoelous cervical vertebra from a woolly rhino from the North Sea.

 
An acoelous vertebra of a dinosaur from Morocco

 

A procoelous caudal vertebra of a mosasaur from Morocco

 
Sadly I don't have any other mammal examples in 3D right now. But hopefully this illustrates how variable it can be, not just in mammals but in all animals.

Olof Moleman AKA Lord Trilobite

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I don't understand the original proposition.  Flat mammal vertebrae?  Flat in which dimension?  . . . The faces (epiphyses) of the centra, as with cetacean vertebrae?

 

Here's the flattest vertebra I've ever collected . . . Recognize it?

 

 

 

2mystery_hand.JPG

2mysteryC.JPG

http://pristis.wix.com/the-demijohn-page

 

What seest thou else

In the dark backward and abysm of time?

---Shakespeare, The Tempest

 

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2 minutes ago, jpc said:

Harry.... I was going to guess frog, but it would be huge.  

Unless it was run over by a car...sorry! Couldn't help myself. It's been a long day. :blush::P

 

Greetings from the Lake of Constance. Roger

http://www.steinkern.de/

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5 hours ago, Harry Pristis said:

 

 

I don't understand the original proposition.  Flat mammal vertebrae?  Flat in which dimension?  . . . The faces (epiphyses) of the centra, as with cetacean vertebrae?

 

Here's the flattest vertebra I've ever collected . . . Recognize it?

 

 

 

2mystery_hand.JPG

2mysteryC.JPG

Yes, flat on the faces (epiphyses)

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