minnbuckeye Posted May 8, 2019 Share Posted May 8, 2019 Our fossil club gained access to a quarry in Central Iowa. The quarry exposes most of the Cedar Valley Formation, so I can not break it down any farther than this, as the fossil was found in a pile of rubble. When I found this specimen, I showed it to 4 different individuals, all of whom called it placoderm "tooth". My research upon arriving home could not find placoderm examples resembling this find. So I am leaning towards a shark tooth??????? Your assistance is appreciated to helping me ID this: Link to comment Share on other sites More sharing options...
digit Posted May 8, 2019 Share Posted May 8, 2019 Very cool looking--and well out of my league. Look forward to learning along with you on this one. Cheers. -Ken Link to comment Share on other sites More sharing options...
Mark Kmiecik Posted May 8, 2019 Share Posted May 8, 2019 Mark. Fossil hunting is easy -- they don't run away when you shoot at them! Link to comment Share on other sites More sharing options...
Al Dente Posted May 8, 2019 Share Posted May 8, 2019 It’s placoderm. Your piece is the back of the jaw. I’ve forgotten the name, maybe I can find it somewhere. 3 Link to comment Share on other sites More sharing options...
minnbuckeye Posted May 8, 2019 Author Share Posted May 8, 2019 Great!!!!!!!!! Florida has spoiled me with shark's teeth. So I was really hoping it was placoderm! 1 Link to comment Share on other sites More sharing options...
Al Dente Posted May 8, 2019 Share Posted May 8, 2019 I remember what type of placoderm- it is from a small placoderm called Ptyctodus. Not to be confused with the Cretaceous Ptychodus. 3 Link to comment Share on other sites More sharing options...
sixgill pete Posted May 8, 2019 Share Posted May 8, 2019 Fantastic find. 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...
FossilDAWG Posted May 8, 2019 Share Posted May 8, 2019 Don Link to comment Share on other sites More sharing options...
Tidgy's Dad Posted May 8, 2019 Share Posted May 8, 2019 Great find, Mike! Life's Good! Tortoise Friend. Link to comment Share on other sites More sharing options...
jcbshark Posted May 8, 2019 Share Posted May 8, 2019 Awesome find Mike! Congrats Every once in a great while it's not just a big rock down there! Link to comment Share on other sites More sharing options...
Fossildude19 Posted May 9, 2019 Share Posted May 9, 2019 I'm thinking FotM, (if it qualifies) Mike. Great find! Tim - VETERAN SHALE SPLITTER VFOTM --- APRIL - 2015 __________________________________________________ "In every walk with nature one receives far more than he seeks." John Muir ~ ~ ~ ~ ><))))( *> About Me Link to comment Share on other sites More sharing options...
digit Posted May 9, 2019 Share Posted May 9, 2019 Yup. It would be nice for this to be admired by a wider audience on the forum. Cheers. -Ken Link to comment Share on other sites More sharing options...
Shellseeker Posted May 9, 2019 Share Posted May 9, 2019 Mike, Mike, You did not tell me that you had a Placoderm teeth site. Congrats !!!! How many of these do you REALLY have ? Apologies. I needed to give @Northern Sharks full credit for this outstanding photo: The White Queen ".... in her youth she could believe "six impossible things before breakfast" Link to comment Share on other sites More sharing options...
minnbuckeye Posted May 9, 2019 Author Share Posted May 9, 2019 @Elasmohunter, the forum has spoken!!! @Shellseeker, I also stumbled onto @Northern Shark's picture. His puts mine to shame but it is labeled "unusual shark's teeth" . This is incorrect??? Placoderms were NOT sharks from my limited understanding??? To everyone else, thanks for appreciating my find!!! Mike 1 Link to comment Share on other sites More sharing options...
Northern Sharks Posted May 9, 2019 Share Posted May 9, 2019 P 8 minutes ago, minnbuckeye said: @Elasmohunter, the forum has spoken!!! @Shellseeker, I also stumbled onto @Northern Shark's picture. His puts mine to shame but it is labeled "unusual shark's teeth" . This is incorrect??? Placoderms were NOT sharks from my limited understanding??? To everyone else, thanks for appreciating my find!!! Mike You are correct, placoderms were not sharks. I already had the album and I didn't feel the need to create a new one for non-shark teeth considering I have so few. There's no limit to what you can accomplish when you're supposed to be doing something else Link to comment Share on other sites More sharing options...
minnbuckeye Posted May 9, 2019 Author Share Posted May 9, 2019 It is so confusing because Ptyctodus was also a cretaceous shark. This is what lead to my confusion over this find as I searched for an ID. They should change the name of one or the other to help with this. Link to comment Share on other sites More sharing options...
FossilDAWG Posted May 9, 2019 Share Posted May 9, 2019 33 minutes ago, minnbuckeye said: It is so confusing because Ptyctodus was also a cretaceous shark. This is what lead to my confusion over this find as I searched for an ID. They should change the name of one or the other to help with this. Ptychodus: Cretaceous shark Ptyctodus: Devonian placoderm The names are close but not the same. The rule in taxonomy is that names within a kingdom must be unique, but a single letter difference is enough to make a name unique. There isn't a valid reason to change either name. The situation is not so uncommon, in Entomology there are many examples of similar but slightly different names. When you are making literally millions of species it's impossible to avoid this. Don 1 Link to comment Share on other sites More sharing options...
minnbuckeye Posted May 9, 2019 Author Share Posted May 9, 2019 My mistake!! 7 minutes ago, FossilDAWG said: Ptychodus: Cretaceous shark Ptyctodus: Devonian placoderm Link to comment Share on other sites More sharing options...
FossilDAWG Posted May 9, 2019 Share Posted May 9, 2019 I admit when I first saw Ptyctodus I thought "wait, isn't that a Cretaceous shark?". It is confusing. Don Link to comment Share on other sites More sharing options...
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