E.T. Posted April 2, 2012 Share Posted April 2, 2012 I found these in the upper most layers in the Maple Mill shale, English River formation (end Devonian) in Iowa. I heard a name which sounded like 'cynthiatodis' being thrown around and also some thought they were braciopods. They must be some sort of shark/fish tooth. They are phosphatic. If anyone here has any additional information on these, please let me know. edit: 4/2/12 12:15pm EST: I just found some literature using google that describes something like this called Gluteus minimus. Link to comment Share on other sites More sharing options...
squalicorax Posted April 2, 2012 Share Posted April 2, 2012 The could be denticles or somesort of phophotized part of a shark. Not sure. That unit has many different shark genera in it. Some of these are more consistent in shape then others. We would probably need a close up detailed photo of on of these to see texture and both sides would help. They remind me of Cenozoic Tilly bones My Flickr Page of My Collection: http://www.flickr.com/photos/79424101@N00/sets Link to comment Share on other sites More sharing options...
Al Dente Posted April 2, 2012 Share Posted April 2, 2012 edit: 4/2/12 12:15pm EST: I just found some literature using google that describes something like this called Gluteus minimus. You are right with Gluteus minimus. Northern Sharks has a photo of one in the Gallery with a short discussion below. You can find it here:http://www.thefossilforum.com/index.php/gallery/image/18690-synthetodus/ Link to comment Share on other sites More sharing options...
E.T. Posted April 2, 2012 Author Share Posted April 2, 2012 So are they Synthetodus or Gluteus? Link to comment Share on other sites More sharing options...
Auspex Posted April 2, 2012 Share Posted April 2, 2012 LINK "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...
E.T. Posted April 2, 2012 Author Share Posted April 2, 2012 So, Weller (1902) wins! Link to comment Share on other sites More sharing options...
Herb Posted April 6, 2012 Share Posted April 6, 2012 Neat looking! "Absence of evidence is not evidence of absence"_ Carl Sagen No trees were killed in this posting......however, many innocent electrons were diverted from where they originally intended to go. " I think, therefore I collect fossils." _ Me "When you have eliminated the impossible, whatever remains, however improbable, must be the truth."__S. Holmes "can't we all just get along?" Jack Nicholson from Mars Attacks Link to comment Share on other sites More sharing options...
Al Dente Posted April 6, 2012 Share Posted April 6, 2012 Did you find any shark teeth when you collected these? Years ago I had the opportunity to collect these fossils and they were in a thin layer with many Devonian shark teeth. Link to comment Share on other sites More sharing options...
Diceros Posted May 25, 2015 Share Posted May 25, 2015 Although Gluteus minimus (a take on the major buttock muscle, gluteus maximus), from the latest Devonian of Iowa, is usually thought to be a fish tooth or brachiopod, the phosphatic composition suggests another interpretation - that they're phosphatic steinkerns (internal molds) of some small, bilaterally-symmetrical (brachs aren't) shelled invertebrate. They aren't Tilly bones. Link to comment Share on other sites More sharing options...
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