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Green River fish ID

Xiphactinus

By Xiphactinus
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Xiphactinus Regular Member

Xiphactinus

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I found this a couple of summers ago at the American Quarry in Kemmerer. Just cleaned it up. It doesn’t look exactly like a Knightia. Might it be something else?90153AD2-CF25-41ED-B8E5-077C070BF7A1.thumb.jpeg.8e120a0abdf051ce255c99e2c48ccf94.jpeg

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Fossildude19 Regular Member

Fossildude19

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I agree this is most likely an Amphiplaga brachypterus.

I think I can count 9 dorsal fin rays, and 11 dorsal pterygiophores. 

90153AD2-CF25-41ED-B8E5-077C070BF7A1.thumb.jpeg.8e120a0abdf051ce255c99e2c48ccf94.jpeg

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    Tim    -  VETERAN SHALE SPLITTER

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PaleoNoel Regular Member

PaleoNoel

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On my first ever trip out west I found an Amphiplaga in the GRF and it looks similar to your fish. I've noticed that many specimens of this particular species have well defined skin impressions, which seems in line with this being Amphiplaga.

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