• TONMOCON VII Announced | MBL at Woods Hole | Apr 6-8, 2018
  • Thanks for visiting! TONMO is the world's greatest online cephalopod enthusiast community, with interactive content going back to May of 2000, and a biennial conference. If you'd like to join in on the fun, become a TONMO member -- it's easy and free. You can follow us on Facebook and Twitter for more cephy goodness.


Tarphycerids

Hajar

Haliphron Atlanticus
Registered
Joined
Mar 7, 2009
Messages
540
#1
Here's a pretty 9 cm Lituites from the Ordovician of Sweden. I've just been reading here that this was one of the first fossil cephalopods to be recognised.

There's a tarphycerid from the Ordovician of the Welsh Borderland here.
 

Attachments

Hajar

Haliphron Atlanticus
Registered
Joined
Mar 7, 2009
Messages
540
#3
Just found a brand new publication by Turek & Manda discussing colour patterns in the tarphycerid Peismoceras. It can be downloaded from here (Turek & Manda 2010).

They write "A marked asymmetry of colour pattern on lateral sides has been observed in several cases, but with no proven relationship to the slight dextral coiling of the shell."
 

Attachments

Hajar

Haliphron Atlanticus
Registered
Joined
Mar 7, 2009
Messages
540
#6
Yes, in this case each of those red bands occurs at the edge of a septum. I don't think the red bands are actually at the surface of the shell (with its fine growth lines), but are visible through the calcite. Have you ever come across something like this?
 

Members online

No members online now.