HuckMucus Posted February 5, 2021 Share Posted February 5, 2021 I know there is not enough to ID but thought I'd share. I used to hike the oil shale cliffs behind the Job Corps Center out of Colbran, Colorado, back in the 70s. The size of the scales on this fish were such that I knew it would be a keeper if I caught it. The oil shale there is such that you can actually light it and it burns. (The little one on the right I found out of Eden, Wyoming, sometime in the 80s). 1 Link to comment Share on other sites More sharing options...
Fossildude19 Posted February 5, 2021 Share Posted February 5, 2021 The one on the right is a Knightia eocaena. (upside down, though.) Too bad the other one is so worn. Nice finds, though. 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...
jpc Posted February 5, 2021 Share Posted February 5, 2021 The one on the left is a pile of articulated gar scales from the genus Lepisosteus. There are two species in the Green River Fm, but you need the skull to ID them to species. The oneon the rightmight be a Knightia, but I need the anal fin to tell them from a Diplomystus. Tim... how do you ID this to Knightia? 1 Link to comment Share on other sites More sharing options...
Fossildude19 Posted February 5, 2021 Share Posted February 5, 2021 1 hour ago, jpc said: The one on the left is a pile of articulated gar scales from the genus Lepisosteus. There are two species in the Green River Fm, but you need the skull to ID them to species. The oneon the rightmight be a Knightia, but I need the anal fin to tell them from a Diplomystus. Tim... how do you ID this to Knightia? JPC, The pectoral fins are below the jaw. On Diplomystus, they are up higher up the side of the body. Also the mouth does not appear to me to be upturned as in Diplomystus. Although the area is messed up, there also does not appear to be any thickened post cranial bones on this fish. Diplomystus would have those. 3 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...
jpc Posted February 5, 2021 Share Posted February 5, 2021 1 hour ago, Fossildude19 said: JPC, The pectoral fins are below the jaw. On Diplomystus, they are up higher up the side of the body. Also the mouth does not appear to me to be upturned as in Diplomystus. Although the area is messed up, there also does not appear to be any thickened post cranial bones on this fish. Diplomystus would have those. Thanks, Fossildude. Link to comment Share on other sites More sharing options...
HuckMucus Posted February 5, 2021 Author Share Posted February 5, 2021 Thanks for the education. I wish I would have looked around for more of it. Link to comment Share on other sites More sharing options...
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