LanceH Posted May 23, 2009 Share Posted May 23, 2009 (edited) Well today Me and Rozilla headed out to our super-secret Pennsylvanian hideaway to gather another batch of "Petrodus" shark dermal denticles. IIRC Petrodus is one of those weird Paleozoic critters supposedly only know from it's denticles (last refs I had). In fact they maybe part of some critter aleady known from it's teeth, who knows. I did find several Deltodus/Sandalodus teeth amongst the same area where the denticles were. I also found a spine thingy. I will get pics of the spine and teeth tomorrow. My take for the day was 39 denticles! Rozilla found 40 denticles, AND a nice Cretaceous Salenia urchin on the way back. Edited January 17, 2011 by LanceHall Link to comment Share on other sites More sharing options...
Gatorman Posted May 23, 2009 Share Posted May 23, 2009 Cool! Hey Lance can I use one of those pics for the header images? Link to comment Share on other sites More sharing options...
LanceH Posted May 23, 2009 Author Share Posted May 23, 2009 Cool! Hey Lance can I use one of those pics for the header images? Sure! Link to comment Share on other sites More sharing options...
Roz Posted May 23, 2009 Share Posted May 23, 2009 Will add mine... This is from the Mingus Shale member of the Garner formation in Palo Pinto county, Texas. It is Pennsylvanian fauna. The age here is Desmoinesian (306.5 to 307 mya). I have to say I love dermal denticles! Wish I would have found a tooth also but happy with what I found. I think there are 3 on the ground in that pic Welcome to the forum! Link to comment Share on other sites More sharing options...
Auspex Posted May 23, 2009 Share Posted May 23, 2009 I have to say I love dermal denticles!I think there are 3 on the ground in that pic I have never heard of these before; love the mystery! Are those crinoid stem sections in there too? "There has been an alarming increase in the number of things I know nothing about." - Ashleigh Ellwood Brilliant “Try to learn something about everything and everything about something.” - Thomas Henry Huxley >Paleontology is an evolving science. >May your wonders never cease! Link to comment Share on other sites More sharing options...
Roz Posted May 23, 2009 Share Posted May 23, 2009 Yes, good eyes seeing the crinoids Dermal Denticles I also have this info "Class Chondrichthyes Subclass Elasmobranchi The genus Petrodus patelliformis represents elasmobranch remains not identifiable to any specific order or family. They are the dermal denticles from an unknown hybodontid (?) shark. Dermal denticles are the cuticular elements that create the rough textured surface of shark skin ("shagreen"). Inj fact dermal denticles are actually shark teeth. Or more accurately ; shark teeth are really modified dermal denticles. They possess the two attributes used to define teeth. The outer surface is covered in a layer of dentine, and its central pulp canal contains a nerve and blood vessels that connect it to the blood and nervous system underneath the skin." The above information was taken from the book, Pennsylvanian Fossils Of North Texas, by Mark McKinzie and John McLeod. Welcome to the forum! Link to comment Share on other sites More sharing options...
mommabetts Posted May 24, 2009 Share Posted May 24, 2009 WOW, those are very nice, I had never heard of those. Thanks for the pictures and the info. Link to comment Share on other sites More sharing options...
MikeD Posted May 25, 2009 Share Posted May 25, 2009 Nice crinoid spine. Most of mine have the tips missing. Link to comment Share on other sites More sharing options...
CreekCrawler Posted May 25, 2009 Share Posted May 25, 2009 Those denticles are neat.It's nice to see something different. Link to comment Share on other sites More sharing options...
LanceH Posted May 25, 2009 Author Share Posted May 25, 2009 Here's the spine thingy. Anyone know for sure? Link to comment Share on other sites More sharing options...
LanceH Posted May 25, 2009 Author Share Posted May 25, 2009 (edited) and the Deltodus/Sandalodus tooth and two smaller ones. Edited January 17, 2011 by LanceHall Link to comment Share on other sites More sharing options...
MikeD Posted May 26, 2009 Share Posted May 26, 2009 Here's the spine thingy. Anyone know for sure? Please post a pic of the blunt end and the other side view (where the white part is). Link to comment Share on other sites More sharing options...
cat shark Posted May 26, 2009 Share Posted May 26, 2009 Those dermal denticles are sooo cool and to have found that many, WOW!! Link to comment Share on other sites More sharing options...
Recommended Posts
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 accountSign in
Already have an account? Sign in here.
Sign In Now