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What’s this fish?


JohnBrewer

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Nice little Knightia eocaena. :) 

 

EDIT: PS - You might want to turn him over. He might be getting dizzy from being upside down. :P 

 

 

9C6500A1-EFDE-490F-BADE-BEEACB5AE1FD.thumb.jpeg.c7893d52e1236bdd754267d9a97e60a5.jpeg

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    Tim    -  VETERAN SHALE SPLITTER

   MOTM.png.61350469b02f439fd4d5d77c2c69da85.png      PaleoPartner.png.30c01982e09b0cc0b7d9d6a7a21f56c6.png.a600039856933851eeea617ca3f2d15f.png     Postmaster1.jpg.900efa599049929531fa81981f028e24.jpg    VFOTM.png.f1b09c78bf88298b009b0da14ef44cf0.png  VFOTM  --- APRIL - 2015  

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"In every walk with nature one receives far more than he seeks."

John Muir ~ ~ ~ ~   ><))))( *>  About Me      

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With fish fossils showing the backbone attached to the skull, the vertebral column usually attaches to the top 1/3 - 1/2 or so of the skull.

So if the vertebral column is in the upper 1//3-  1/2 of the body, that is the top.  :) 

Or more simply, the verts are usually situated closer to the top of the fish than the bottom.

 

 

9C6500A1-EFDE-490F-BADE-BEEACB5AE1FD.thumb.jpeg.c7893d52e1236bdd754267d9a97e60a5.jpeg

 

Also, fin placement is  helpful for figuring out orientation. The belly or bottom (ventral) side will have (if they are preserved well, that is, they aren't on yours) the pectoral fins, pelvic fins, and anal fin showing. Usually only one or two dorsal fins on the top. 

 

Sorry for the impromptu lesson. :blush:

 

 

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    Tim    -  VETERAN SHALE SPLITTER

   MOTM.png.61350469b02f439fd4d5d77c2c69da85.png      PaleoPartner.png.30c01982e09b0cc0b7d9d6a7a21f56c6.png.a600039856933851eeea617ca3f2d15f.png     Postmaster1.jpg.900efa599049929531fa81981f028e24.jpg    VFOTM.png.f1b09c78bf88298b009b0da14ef44cf0.png  VFOTM  --- APRIL - 2015  

__________________________________________________
"In every walk with nature one receives far more than he seeks."

John Muir ~ ~ ~ ~   ><))))( *>  About Me      

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 Hard to tell from the photo but there seems to be some paint work on the tail  and the other fins?  Not sure.  but it looks very much like a Knightia from GRF? 

 

RB

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1 hour ago, RJB said:

 Hard to tell from the photo but there seems to be some paint work on the tail  and the other fins?  Not sure.  but it looks very much like a Knightia from GRF? 

RB

Good eye, Ron.  :) 

Definitely looks a bit painted.

And I agree, probably Green River Formation, but not the Parachute Creek Member. I believe articulated fish fossils are not abundant there.

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    Tim    -  VETERAN SHALE SPLITTER

   MOTM.png.61350469b02f439fd4d5d77c2c69da85.png      PaleoPartner.png.30c01982e09b0cc0b7d9d6a7a21f56c6.png.a600039856933851eeea617ca3f2d15f.png     Postmaster1.jpg.900efa599049929531fa81981f028e24.jpg    VFOTM.png.f1b09c78bf88298b009b0da14ef44cf0.png  VFOTM  --- APRIL - 2015  

__________________________________________________
"In every walk with nature one receives far more than he seeks."

John Muir ~ ~ ~ ~   ><))))( *>  About Me      

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On 2/14/2019 at 5:42 PM, Fossildude19 said:

but not the Parachute Creek Member.

I didnt catch this.  Its most deffinetly not from the Parachute member.

 

RB

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