Napoleon North Posted April 7, 2016 Share Posted April 7, 2016 (edited) Hi This is ptychodus tooth? Age : Cretacous Location :near Skałki Twardowskiego , Kraków , Southern Poland Size: near 13 mm x 8-9 mm Edited April 7, 2016 by Napoleon North Link to comment Share on other sites More sharing options...
fifbrindacier Posted April 7, 2016 Share Posted April 7, 2016 (edited) Hello ! Are they photos taken with a telephone ? I can't zoom on them. It looks like some shell. But maybe there are crabs with claws like that. Edited April 7, 2016 by fifbrindacier "On ne voit bien que par le coeur, l'essentiel est invisible pour les yeux." (Antoine de Saint-Exupéry) "We only well see with the heart, the essential is invisible for the eyes." In memory of Doren Link to comment Share on other sites More sharing options...
Napoleon North Posted April 7, 2016 Author Share Posted April 7, 2016 Ok new photo . Mayby ptychodus tooth? Link to comment Share on other sites More sharing options...
Napoleon North Posted April 7, 2016 Author Share Posted April 7, 2016 looks incomplete specimen Link to comment Share on other sites More sharing options...
Napoleon North Posted April 7, 2016 Author Share Posted April 7, 2016 (edited) crab claws? Edited April 7, 2016 by Napoleon North Link to comment Share on other sites More sharing options...
PFOOLEY Posted April 7, 2016 Share Posted April 7, 2016 Mayby ptychodus tooth? Yes, maybe. Your second set of photos look similar to ptychodus enamel. looks incomplete specimen Unfortunately, yes. "I am glad I shall never be young without wild country to be young in. Of what avail are forty freedoms without a blank spot on the map?" ~Aldo Leopold (1887-1948) New Mexico Museum of Natural History Bulletins Link to comment Share on other sites More sharing options...
Napoleon North Posted April 7, 2016 Author Share Posted April 7, 2016 Ok thanks you the preparation at the end Link to comment Share on other sites More sharing options...
ckmerlin Posted April 8, 2016 Share Posted April 8, 2016 even if it is incomplete it has a lovely colour id be pleased with it best regards Chris "A man who stares at a rock must have a lot on his mind... or nothing at all' Link to comment Share on other sites More sharing options...
truceburner Posted April 9, 2016 Share Posted April 9, 2016 Do you intend to remove it from the matrix? I would like to see the margins and root if so. Link to comment Share on other sites More sharing options...
JustPlainPetrified Posted April 9, 2016 Share Posted April 9, 2016 Looks like part of an ammonite to me 2 Link to comment Share on other sites More sharing options...
Napoleon North Posted April 10, 2016 Author Share Posted April 10, 2016 Yes this is opalised ! Link to comment Share on other sites More sharing options...
Napoleon North Posted April 10, 2016 Author Share Posted April 10, 2016 next photo Link to comment Share on other sites More sharing options...
JustPlainPetrified Posted April 10, 2016 Share Posted April 10, 2016 Very nice piece! Link to comment Share on other sites More sharing options...
Napoleon North Posted April 10, 2016 Author Share Posted April 10, 2016 Thanks Link to comment Share on other sites More sharing options...
Ramo Posted April 12, 2016 Share Posted April 12, 2016 Sorry I'm a little late to the party, but I'm pretty sure it is not a ptychodus tooth. It appears that the ridges run all the way across the top, which is ok, but they also appear to run all the way down the sides, which is not a characteristic of any ptychodus I know of. Also the bottom of the "tooth" appears more narrow than the top, another red flag. It looks a lot like a 3-d ammonite to me. Ramo 1 For one species to mourn the death of another is a new thing under the sun. -Aldo Leopold Link to comment Share on other sites More sharing options...
abyssunder Posted April 12, 2016 Share Posted April 12, 2016 It looks like there are tube worm remains on the shell. " We are not separate and independent entities, but like links in a chain, and we could not by any means be what we are without those who went before us and showed us the way. " Thomas Mann My Library Link to comment Share on other sites More sharing options...
Carl Posted April 12, 2016 Share Posted April 12, 2016 I can't claim to know Ptychodus as well as some here, but I definitely get the sense that it is more like a tooth than an ammonite. The slight translucency, the color, and the white lines all remind me of a lot of the fossil teeth we have in our collections. I know that ammonites are often infilled with calcite of this general color but there's something about the luminosity that, to me, is much more reminiscent of a tooth. And those white marks are what I've sometimes heard called "root burns" where, as the story goes, roots reached the fossil and leached out some of the minerals. 1 Link to comment Share on other sites More sharing options...
Ramo Posted April 13, 2016 Share Posted April 13, 2016 (edited) Well, I had another look. When I refered to the sides being narrower than the crown, I was looking at the example "Just plain petrified" posted, not the item we were trying to ID. Sorry about that. That really threw me off. I am still uncertain, as to ptychodus based on the way the ridges run across it. However the color and lines do appear tooth like. I also see on the most recent photo what appears to possibly be a flat "wear" area towards the left side of the photo. I agree now, that it is most likely tooth, but to whom it belonged is what I would like to know now. ("root burns" I have all ways attributed those lines to feeding traces from an unknown mollusk. Perhaps we need to start a new thread discussing and showing photos of examples of those) Ramo Edited April 13, 2016 by Ramo For one species to mourn the death of another is a new thing under the sun. -Aldo Leopold Link to comment Share on other sites More sharing options...
Carl Posted April 28, 2016 Share Posted April 28, 2016 Finally! Here's a close up shot of one of our Albertosaurus specimens that shows these "root burns." Link to comment Share on other sites More sharing options...
abyssunder Posted April 28, 2016 Share Posted April 28, 2016 Are these also "root burns" visible on the crowns of the teeth, or microborings under the surface, such as ichnogenus Mycelites, Abeliella or Mycobystrovia? http://www.thefossilforum.com/index.php?/gallery/sizes/40718-meg-shark-tooth-with-pelecypod-boring/large/http://www.thefossilforum.com/index.php?/topic/17846-a-bone-and-shark-teeth/ " We are not separate and independent entities, but like links in a chain, and we could not by any means be what we are without those who went before us and showed us the way. " Thomas Mann My Library Link to comment Share on other sites More sharing options...
Carl Posted April 29, 2016 Share Posted April 29, 2016 I, personally, would call those root burns. Link to comment Share on other sites More sharing options...
NSRhunter Posted April 30, 2016 Share Posted April 30, 2016 This is clearly a ptychodus tooth. Has the characteristic ridges and the sheen like enamel reminiscent of some of the specimens here in Texas. Just the crown though but nice find! Link to comment Share on other sites More sharing options...
abyssunder Posted April 30, 2016 Share Posted April 30, 2016 From the collected and studied material of Opole Silesia region of SW Poland the following species were recognized : Ptychodus rugosus, Ptychodus mammillaris, Ptychodus polygyrus, P. latissimus, where inoceramid shells were dominant over ammonite shells which suggest that the ptychodontids fed on inoceramid bivalves. Late Cretaceous sharks in the Opole Silesia region (SW Poland).pdf 1 " We are not separate and independent entities, but like links in a chain, and we could not by any means be what we are without those who went before us and showed us the way. " Thomas Mann My Library Link to comment Share on other sites More sharing options...
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