• Welcome to TONMO, the premier cephalopod interest community, and birthplace of #WorldOctopusDay and #CephalopodAwarenessDays. Founded in 2000, we are a large community of experts, hobbyists and enthusiasts, some of whom come together when we host our biennial conference. To join in on the fun, sign up. You can also become a Supporter for just $50/year to remove all ads and enjoy other perks. Follow us on Twitter for more cephy goodness.

Fossil Hooks

Steve O'Shea

TONMO Supporter
Registered
Joined
Nov 19, 2002
Messages
4,671
Tough one Kevin. I'm having trouble determining the structures symmetry (if it has any at all), exacerbated by focus/resolution problems. If it is a hook then it is almost certainly incomplete (no prize there). Whoever collected/photographed it (?Mike Everhart) must recollect and look for further material, hopefully series of them, hopefully some of which will be more complete (and more revealing).

I know of one squid type only (extant squid) that has a single hook on an arm (two hooks in total on the intact animal; all other suckers carry conventional sucker rings) .... tiz a 'secret squid' .... All other squid that possess hooks, with which I am familiar, possess many of them, in two rows, either along the arms or arming the tentacle clubs (this is not to say the fossil 'cephalopod' shared the same body plan). Nevertheless, if this structure was a hook, or part of a hook, then more than likely there'll be many more of them locked in that matrix.

Verdict .... unknown - UFO (unidentified fishy object)
 

Clem

Architeuthis
Registered
Joined
Apr 6, 2003
Messages
1,839
Hello Architeuthoceras,

My guess is that those are teeth, rather than hooks, perhaps "baby teeth" from a ray-finned animal equipped with plate-like, crushing teeth. At first, I thought they might be dermal denticles (in part because of their small size), but most denticles I've seen have a flared ring around the base.

oceansofkansas.com has some photos of Ptychodus teeth, here:

http://www.oceansofkansas.com/FieldGuide2.html



:?:
 

Architeuthoceras

Architeuthis
Staff member
Moderator
Joined
Nov 19, 2002
Messages
2,445
Hi Clem,

You are correct, the webmaster of that site has changed the content of that page, it used to show a small "glob" of something that really didn't resemble anything, he thought it might be a squid hook. Those small teeth look alot more like hooks than the "glob" ever did! Sorry for the confusion.
:ammonite:
 

Clem

Architeuthis
Registered
Joined
Apr 6, 2003
Messages
1,839
No worries, Kevin. The confusion led me to some nifty sites.

BTW, do you know of any online sources for images of belemnite arm hooks? I'd like to see what the genuine article looks like.

Clem
 

Clem

Architeuthis
Registered
Joined
Apr 6, 2003
Messages
1,839
Phil,

The Peachnet.edu site notes that many of the fossils shown are "floor tiles" from Atlanta's Fernbank Museum. If those tiles are castings from the originals (seems likely: wouldn't want to tromp on the real thing), that could explain the mysterious reversal of the image Kevin provided.

Just a guess.

:roll:

Clem
 
Joined
Dec 24, 2002
Messages
1,169
Maybe I just skimmed it too fast... What's wrong with the article? I mean, they left out the Class Caudofoveata, but hell... EVERYONE leaves out that class...

I tell ya, they get NO respect... :roll:

Sushi and Sake,

John
 

Latest Posts

Forum statistics

Threads
21,023
Messages
207,082
Members
8,492
Latest member
DHF8

Monty Awards

TONMOCON IV (2011): Terri
TONMOCON V (2013): Jean
TONMOCON VI (2015): Taollan
TONMOCON VII (2018): ekocak


Top