Jump to content
Sign in to follow this  
Roger

Poterioceras Or Conularid?

Recommended Posts

Roger

While collecting in the Finis Shale (Pennsylvanian) near Jacksboro, TX, I came across this interesting piece. When I looked at it in the field I thought that it was a short stubby Conularid but when I cleaned it up and looked at more closely (ie under the magnifying lite) it did not have the proper appearance of a Conularia. I did some research and in "Pennsylvania Fossils of North Texas" (McKinzie andMcLeod) published by the Dallas Paleo Society, I came across the picture and description of a cephalopod called Poterioceras which looked a lot like the fossil I have (general size, shape, growth lines and, of course, location).

So I put it to you - what do you think?

this image gives the size - scale: x-axis = inches y axis = mm

9be29d49.jpg

This image shows the growth lines

3c5989e8.jpg

Finally this image taken on end shows the slight curvature from top to bottom (sorry depth of field went with the close up)

309b0bc3.jpg

Thanks

Share this post


Link to post
Share on other sites
jkfoam

Roger,

I can see why you initially thought it was a Conularid and I agree that it is not. I think it may well be a Nautiloid and could very well be Poterioceras sp. I am just not that familiar with Nautiloids. My book calls Poterioceras a short stout nautiloid.

JKFoam

Share this post


Link to post
Share on other sites
Roger
Roger,

I can see why you initially thought it was a Conularid and I agree that it is not. I think it may well be a Nautiloid and could very well be Poterioceras sp. I am just not that familiar with Nautiloids. My book calls Poterioceras a short stout nautiloid.

JKFoam

Thanks - JK - I have an email out to Mark McKinzie (one of the authors of the book I referenced) and I believe that he'll be able to tie down the ID once he replies. He's an oil geologist and works off shore quite a bit. I'll keep you informed when he gets back to me.

btw - <My book calls Poterioceras a short stout nautiloid> I don't know why the people that name things don't have some fun once in a while . for example rather than "Poterioceras" how about "Teapotoceras" - after all it is short and stout!!!

Roger

Share this post


Link to post
Share on other sites
jkfoam

Roger,

I have known a couple of Taxonomist in the past and they were generally as fun loving a group as you would ever want to meet. But, I have to tell you none of them would ever dream of taking liberties with a Genus name. Now the species name is another matter. How about "Poterioceras teapotii".

JKFoam

Share this post


Link to post
Share on other sites

Create an account or sign in to comment

You need to be a member in order to leave a comment

Create an account

Sign up for a new account in our community. It's easy!

Register a new account

Sign in

Already have an account? Sign in here.

Sign In Now

Sign in to follow this  

  • Recently Browsing   0 members

    No registered users viewing this page.

×