D.N.FossilmanLithuania Posted December 26, 2018 Share Posted December 26, 2018 Dear Guys, I recently got a new camera and made the better pictures of all my lungfish dental plates. There are some families identified but I would be very happy to discuss with you about unidentified specimens and features of each dental plate, maybe some of you would know genera of these finds? The age of fossils is Devonian- Early Carboniferous, they are found in Lithuanian erratics (the majority in marine dolomite and some in shallow marine sandstone). The smallest find is 1,5 mm length and the largest is 1,2 cm length. Please tell your opinion about identifications of these finds, any help will be very appreciated because it would be great material for publication The first fossils I show are holodipterid dental plates. The main feature- merged tooth rows with poorly visible odontodes in the top. 4-7 mm length. 4 Link to comment Share on other sites More sharing options...
D.N.FossilmanLithuania Posted December 26, 2018 Author Share Posted December 26, 2018 The second group is stomiahykid dental plates (1,5 mm- 1,2 cm length). The main feature is more crimson lower corners of tooth plates, the odontodes are usually ball shaped and rarely more crimson. 4 Link to comment Share on other sites More sharing options...
D.N.FossilmanLithuania Posted December 26, 2018 Author Share Posted December 26, 2018 The third group (Dipterids). they have specific oblong dental plates in lower jaw and there (except Conchodus) usually are many tooth rows. The first dental plate (identified as Conchodus) is 5 mm length, the other is 3 mm length and incomplete. 2 Link to comment Share on other sites More sharing options...
D.N.FossilmanLithuania Posted December 26, 2018 Author Share Posted December 26, 2018 The fourth group is Chirodipterids. The dental plates have more oblong rectangular shape with horizontal lower edge, odontodes are visible in upper half of surface. The both dental plates are 5 mm length. 2 Link to comment Share on other sites More sharing options...
D.N.FossilmanLithuania Posted December 26, 2018 Author Share Posted December 26, 2018 The fifth group is Phaneropleurids. Triangular shape of dental plates is common, similar as Harajicadipterus. The size of dental plate is 7 mm length. 2 Link to comment Share on other sites More sharing options...
D.N.FossilmanLithuania Posted December 26, 2018 Author Share Posted December 26, 2018 The sixth group- possible stem Lepidosireniformes. I saw in wikipedia that they appeared about 400 million years ago and I have found two dental plates with sharp tooth rows similar as Gnathorhiza, however there are five rows when Gnathoriza has 3 rows. But I think the ancestry is possible. The both dental plates are 3-4 mm length. 2 Link to comment Share on other sites More sharing options...
The Amateur Paleontologist Posted December 26, 2018 Share Posted December 26, 2018 (edited) Neat! You seem to have documented very well the Lithuanian Devo-Carbo lungfish fauna Looking forward to some more updates! -Christian Edited December 26, 2018 by The Amateur Paleontologist 1 Opalised fossils are the best: a wonderful mix between paleontology and mineralogy! Q. Where do dinosaurs study? A. At Khaan Academy!... My ResearchGate profile Link to comment Share on other sites More sharing options...
D.N.FossilmanLithuania Posted December 26, 2018 Author Share Posted December 26, 2018 The other type is specific tooth plates from lower jaw. the size is between 3 and 7mm length. 2 Link to comment Share on other sites More sharing options...
doushantuo Posted December 26, 2018 Share Posted December 26, 2018 Nice work,DN! 1 Link to comment Share on other sites More sharing options...
D.N.FossilmanLithuania Posted December 26, 2018 Author Share Posted December 26, 2018 The other toothplate- Ctenodus sensu strictos in better quality! 6 mm length. 2 Link to comment Share on other sites More sharing options...
D.N.FossilmanLithuania Posted December 26, 2018 Author Share Posted December 26, 2018 And the last are unidentified- from 3 mm to 1 cm length, the genera or families would be helpful. 2 Link to comment Share on other sites More sharing options...
D.N.FossilmanLithuania Posted December 26, 2018 Author Share Posted December 26, 2018 Notice that 4 th unidentified dental plate has thickest tooth row in short edge! It would be interesting to know which genera it would be typical to. 1 Link to comment Share on other sites More sharing options...
D.N.FossilmanLithuania Posted December 26, 2018 Author Share Posted December 26, 2018 Dear Christian and Doushantuo, Thank you very much for kind answers, I wish there could be someone who knows fossil lungfishes good in this forum! Merry Christmas to you! Link to comment Share on other sites More sharing options...
ynot Posted December 26, 2018 Share Posted December 26, 2018 Very nice teeth and pictures. Sorry I can not help with IDs, maybe @Fossildude19 will know. Darwin said: " Man sprang from monkeys." Will Rogers said: " Some of them didn't spring far enough." My Fossil collection - My Mineral collection My favorite thread on TFF. Link to comment Share on other sites More sharing options...
Archie Posted December 26, 2018 Share Posted December 26, 2018 These are really cool specimens! I cant help with I'd though either sorry, all I know is the ones I find (very rarely) in the Upper Carboniferous formation I hunt are usually a Ctenodus sp. if the ridges are parallel and a Sagenodus sp. if they are radiating. Link to comment Share on other sites More sharing options...
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