• 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.


origins of the beak

zen_mantid

Larval Mass
Registered
Joined
Feb 14, 2011
Messages
1
#1
I have always thought that the ceph beak was derived from the ancestral molluscan radula. Now that I know they also have radulas, I wonder if b oth are derived from the ancestral radula. I cannot find anything online about it, nor did my searches here succeed.

Does anyone have any information on this?

Thanks!
 

OB

Colossal Squid
Staff member
Moderator
Joined
Oct 19, 2003
Messages
3,084
#2
Hi there zen_mantid and :welcome: to Tonmo! I would expect the beak not to be derived from the "ancestral" radula proper, as it appears more as a chitinized edge on the sphincter muscle lining the "ancestral mouth". I remember PZ doing a blog entry on beaks back in 2006, so hyperlinked herewith. have fun in our little corner of the web!
 

Members online

No members online now.