Ptychodus04 Posted July 20, 2018 Share Posted July 20, 2018 I need the collective help of the TFF community on some identifications. I received a lot of a few fossils to prep and some have no identification. The first is this fish. The skull makes me think gar, but there are no scales. The body seems to have dermal denticles like a shark. This one has me stumped. It is in a thin, layered, limestone of unknown origin. Regards, Kris Global Paleo Services, LLC https://globalpaleoservices.com http://instagram.com/globalpaleoservices http://instagram.com/kris.howe Link to comment Share on other sites More sharing options...
Ptychodus04 Posted July 20, 2018 Author Share Posted July 20, 2018 Regards, Kris Global Paleo Services, LLC https://globalpaleoservices.com http://instagram.com/globalpaleoservices http://instagram.com/kris.howe Link to comment Share on other sites More sharing options...
Ptychodus04 Posted July 20, 2018 Author Share Posted July 20, 2018 Regards, Kris Global Paleo Services, LLC https://globalpaleoservices.com http://instagram.com/globalpaleoservices http://instagram.com/kris.howe Link to comment Share on other sites More sharing options...
Ptychodus04 Posted July 20, 2018 Author Share Posted July 20, 2018 Regards, Kris Global Paleo Services, LLC https://globalpaleoservices.com http://instagram.com/globalpaleoservices http://instagram.com/kris.howe Link to comment Share on other sites More sharing options...
snolly50 Posted July 20, 2018 Share Posted July 20, 2018 Not a clue. Is it your impression, it is situated in ventral aspect? Human beings, who are almost unique in having the ability to learn from the experience of others, also are remarkable for their apparent disinclination to do so. - Douglas Adams, Last Chance to See Link to comment Share on other sites More sharing options...
piranha Posted July 20, 2018 Share Posted July 20, 2018 Crossopholis magnicaudatus figures from: Grande, L. 2013 The lost world of Fossil Lake: Snapshots from deep time. University of Chicago Press, 425 pp. Link to comment Share on other sites More sharing options...
Bone guy Posted July 20, 2018 Share Posted July 20, 2018 +1 crossopholis, and a nice one at that. I like how it's preserved in a smaller piece of matrix which allows for easier observation. Link to comment Share on other sites More sharing options...
Ptychodus04 Posted July 20, 2018 Author Share Posted July 20, 2018 Thanks @piranha and @Bone guy. Regards, Kris Global Paleo Services, LLC https://globalpaleoservices.com http://instagram.com/globalpaleoservices http://instagram.com/kris.howe Link to comment Share on other sites More sharing options...
Al Dente Posted July 20, 2018 Share Posted July 20, 2018 Does the matrix look like typical Green River Formation? If not it could be a Chinese paddlefish, Protopsephurus sp. Link to comment Share on other sites More sharing options...
Pixpaleosky Posted July 20, 2018 Share Posted July 20, 2018 38 minutes ago, Al Dente said: Does the matrix look like typical Green River Formation? If not it could be a Chinese paddlefish, Protopsephurus sp. Fully agree with you, that's a Chinese one Link to comment Share on other sites More sharing options...
Bone guy Posted July 20, 2018 Share Posted July 20, 2018 2 hours ago, Pixpaleosky said: Fully agree with you, that's a Chinese one You know the funny thing is that's what I thought at first, for some reason I just assumed this was green river formation.... if its not green river it's likely Protosephurus liui. Link to comment Share on other sites More sharing options...
RJB Posted July 20, 2018 Share Posted July 20, 2018 I imeadiatly thougth paddle fish but its not green river rock. Something funny lookin about that rock? has anything been done to it? RB Link to comment Share on other sites More sharing options...
Fossildude19 Posted July 20, 2018 Share Posted July 20, 2018 18 minutes ago, RJB said: I imeadiatly thougth paddle fish but its not green river rock. Something funny lookin about that rock? has anything been done to it? RB I agree, Ron. Not Green River Matrix. It looks like there were extensive crack/break repairs, as well as some sort of filling of missing matrix to smooth out the plate. This could very well be Chinese in origin. 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...
Ptychodus04 Posted July 20, 2018 Author Share Posted July 20, 2018 All, Thanks for the added insight. This is the hard part of identifying specimens from poorly curated collections. I suspected a Chinese origin when I first saw this but didn’t want to sway the discussion process. I have not seen a ton of Chinese plates though but the pattern of breaks looked similar. There has been some filler added but they did a pretty good job. I still need to do some serious inspection work on it. Regards, Kris Global Paleo Services, LLC https://globalpaleoservices.com http://instagram.com/globalpaleoservices http://instagram.com/kris.howe Link to comment Share on other sites More sharing options...
Ptychodus04 Posted July 20, 2018 Author Share Posted July 20, 2018 @Al Dente I think you are onto something. A quick Google of Protopsephurus pulls up a link to @oilshale's gallery with a beautiful image of a specimen very similar to this one. Regards, Kris Global Paleo Services, LLC https://globalpaleoservices.com http://instagram.com/globalpaleoservices http://instagram.com/kris.howe Link to comment Share on other sites More sharing options...
piranha Posted July 20, 2018 Share Posted July 20, 2018 Good catch. My initial thought was the first preparator attempted to smooth the mangled the matrix. Grande et al. 2002 has specimens with similar matrix fractures. Grande, L., Jin, F., Yabumoto, Y., & Bemis, W.E. 2002 Protopsephurus liui, a well-preserved primitive paddlefish (Acipenseriformes: Polyodontidae) from the Lower Cretaceous of China. Journal of Vertebrate Paleontology, 22(2):209-237 Link to comment Share on other sites More sharing options...
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