PaleoWilliam Posted June 22, 2016 Share Posted June 22, 2016 Here it is. It is from Texas and is almost an inch. Does anybody have an idea on the formation? Link to comment Share on other sites More sharing options...
Foshunter Posted June 22, 2016 Share Posted June 22, 2016 Hi !!!, you have found a P. mortini, nice rare find. Can I ask where it was found????......Tom Grow Old Kicking And Screaming !!"Don't Tread On Me" Link to comment Share on other sites More sharing options...
PaleoWilliam Posted June 22, 2016 Author Share Posted June 22, 2016 I got them from an old collection a few days ago. I got seven of them. Link to comment Share on other sites More sharing options...
CraigHyatt Posted June 22, 2016 Share Posted June 22, 2016 For the rest of us hoi polloi, it's a tooth from a Late Cretaceous durophagous 10 m (30 ft) shark. I guess durophagous or "shell-crushing" explains the weird shape of the tooth. ;-) http://oceansofkansas.com/ptychodus.html Info: Craig Hyatt, retired software/electrical engineer Experience: Beginner, fossil hunting less than a year Location: Eagle Pass, TX USA on the border with Mexico, hot dry desert Formation: Escondido, Marine, Upper Cretaceous Materials: Sandstone, Mudstone, Shale, Chert, Chalk Typical: Thalassinoides, Sphenodiscus, Exogyra, Inoceramus Reference: http://txfossils.com/Txfossils.html Link to comment Share on other sites More sharing options...
siteseer Posted June 27, 2016 Share Posted June 27, 2016 The matrix looked familiar but I had to look at some of my specimens first before venturing something a little more than a wild guess. It does look like some Atco Formation matrix (a site in Ellis County collected by Ken Smith, a collector I met at MAPS and who passed away way too soon) which would contain P. mortoni teeth. I'm just saying what the matrix resembles but it helps that the tooth would be what you find in it. I would be better if some collectors who know the Atco well would comment one way or the other. Here it is. It is from Texas and is almost an inch. Does anybody have an idea on the formation? Link to comment Share on other sites More sharing options...
LSCHNELLE Posted June 28, 2016 Share Posted June 28, 2016 I have found 12 P. Mortoni ranging from 7 to 17 mm width in Austin, Texas area's basal Atco conglomerate. None quite that large. Only two other teeth don't have the single point converging at the top of the crown. Only two might be another Ptychodus species like Atcoensis or Martini. Link to comment Share on other sites More sharing options...
Ramo Posted June 28, 2016 Share Posted June 28, 2016 http://oceansofkansas.com/FtHaysPtychodus.html I'm partial to this Ptychodus page 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...
doushantuo Posted June 28, 2016 Share Posted June 28, 2016 Don't know if Fruitbat has posted this yet,but; http://www.elasmo.com/refs/pdf/hamm2008-ptychodusMS.pdf Link to comment Share on other sites More sharing options...
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