Hipockets Posted May 22, 2015 Share Posted May 22, 2015 I was looking at some hardouinia mortonis I had prior collected from the Pee Dee form. in Rocky Point,NC ( late cretaceous). I noticed the peristome was spiney on a couple of these. I have seen spines in the past on the bottom side but not on the peristome. These two are an exception,. They are not crystals, but spines. Had believed until now that the peristome on echs did not have spines. Can anyone clarify this for me? Thanks. Link to comment Share on other sites More sharing options...
Auspex Posted May 22, 2015 Share Posted May 22, 2015 Great Googly Moogly, what a great fossil! I have to admit that such occurrence never crossed my mind, and now I have to wonder why it didn't "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...
JohnJ Posted May 22, 2015 Share Posted May 22, 2015 Very nice. Echinoids often have a variety of spines in different locations on the test. Some modern examples. The human mind has the ability to believe anything is true. - JJ Link to comment Share on other sites More sharing options...
Hipockets Posted May 22, 2015 Author Share Posted May 22, 2015 Thanks JohnJ, but I still don't see one with the spines attached to the teeth or between the teeth.. Could just be an illusion I guess or how the spines were laying. Link to comment Share on other sites More sharing options...
JohnJ Posted May 22, 2015 Share Posted May 22, 2015 Thanks JohnJ, but I still don't see one with the spines attached to the teeth or between the teeth.. Could just be an illusion I guess or how the spines were laying. Here are images of living 'sand dollars' that have spines similar to your Hardouinia mortonis. The human mind has the ability to believe anything is true. - JJ Link to comment Share on other sites More sharing options...
Hipockets Posted May 22, 2015 Author Share Posted May 22, 2015 so are we looking at ...cilia ? Thats what was referenced on the sand dollar page ( home to the photo examples). Thanks Link to comment Share on other sites More sharing options...
JohnJ Posted May 22, 2015 Share Posted May 22, 2015 They are spines. The human mind has the ability to believe anything is true. - JJ Link to comment Share on other sites More sharing options...
sixgill pete Posted May 22, 2015 Share Posted May 22, 2015 That is amazing Mark. Bulldozers and dirt Bulldozers and dirt behind the trailer, my desert Them red clay piles are heaven on earth I get my rocks off, bulldozers and dirt Patterson Hood; Drive-By Truckers May 2016 May 2012 Aug 2013, May 2016, Apr 2020 Oct 2022 Link to comment Share on other sites More sharing options...
erose Posted May 22, 2015 Share Posted May 22, 2015 Cool fossil. Sometimes preservation is astounding. Link to comment Share on other sites More sharing options...
Hipockets Posted May 22, 2015 Author Share Posted May 22, 2015 Thanks everyone and have a safe and happy memorial day weekend. Link to comment Share on other sites More sharing options...
Plax Posted May 26, 2015 Share Posted May 26, 2015 I would guess that the fine spines on the teeth help the animal differentiate it's food from the substrate? Spines on teeth is counter intuitive to us vertebrates. I have some dead echinoids to look at but no cassiduloids. I need to look at JohnJ's links also. Fascinating specimen for sure! Link to comment Share on other sites More sharing options...
Raggedy Man Posted May 26, 2015 Share Posted May 26, 2015 Wow ...I'm back. Link to comment Share on other sites More sharing options...
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