Bone guy Posted May 3, 2018 Share Posted May 3, 2018 Hello. I did a double take when I saw this Knightia alta for sale. I see this fish has a pair of both dorsal and ventral fins. I'm thinking this may actually be a Mioplosus, but it could also be a priscacara but I'm not really sure. Would anyone have any idea what it is? P.S the picture quality is aweful, but it's the only picture the seller has posted. Link to comment Share on other sites More sharing options...
caldigger Posted May 3, 2018 Share Posted May 3, 2018 Looks kinda dead to me. 1 Link to comment Share on other sites More sharing options...
Miocene_Mason Posted May 3, 2018 Share Posted May 3, 2018 gosiutichthys perhaps? “...whilst this planet has gone cycling on according to the fixed law of gravity, from so simple a beginning endless forms most beautiful and most wonderful have been and are being evolved.” ~ Charles Darwin Happy hunting, Mason Link to comment Share on other sites More sharing options...
Fossildude19 Posted May 3, 2018 Share Posted May 3, 2018 Had a neat little discussion about this not too long ago. I'm watching this one, too. This looks like a juvenile Priscacara to me. The thicker fin rays on the second dorsal point to that, in my opinion. Here it is, compared with juveniles of both species. 1 hour ago, WhodamanHD said: gosiutichthys perhaps? Gosiutichthys parvus has only one dorsal fin. 4 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...
Miocene_Mason Posted May 3, 2018 Share Posted May 3, 2018 18 minutes ago, Fossildude19 said: Gosiutichthys parvus has only one dorsal fin And so it does. I’ll leave the fishes to the experts next time “...whilst this planet has gone cycling on according to the fixed law of gravity, from so simple a beginning endless forms most beautiful and most wonderful have been and are being evolved.” ~ Charles Darwin Happy hunting, Mason Link to comment Share on other sites More sharing options...
Bone guy Posted May 3, 2018 Author Share Posted May 3, 2018 After seeing @Fossildude19's post I'm convinced it's a priscacara. I might follow up this thread with better pictures once I have mr. Fishy in my hands. Link to comment Share on other sites More sharing options...
Bone guy Posted May 7, 2018 Author Share Posted May 7, 2018 I now have the priscacara in my hands. I'm very happy with it, I have a strange fondness of juvenile green river fish. Is there any way to narrow this down to the species? The fish is 2.5 inches long. Link to comment Share on other sites More sharing options...
Fossildude19 Posted May 7, 2018 Share Posted May 7, 2018 Nice buy, Bone guy. Not sure you could get it down to species, but you could look through the Green River PDF, to see what the differences between the species are. 1 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...
Bone guy Posted May 7, 2018 Author Share Posted May 7, 2018 Thanks, I'll take a look. The detective process has begun! Link to comment Share on other sites More sharing options...
Fossildude19 Posted May 7, 2018 Share Posted May 7, 2018 3 minutes ago, Bone guy said: Thanks, I'll take a look. The detective process has begun! LINK 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...
Bone guy Posted May 7, 2018 Author Share Posted May 7, 2018 I think this may be a Priscacara liops. My reasoning lies in the dorsal fins. When I look at this fish I see that both dorsal fins are about the same size, the exterior is slightly larger. This is characteristic of Priscacara liops. When I look at Priscacara serrata I see the anterior dorsal fin is larger than the exterior, which doesn't match what I see on this fish. Does this sound right? Link to comment Share on other sites More sharing options...
Fossildude19 Posted May 7, 2018 Share Posted May 7, 2018 20 minutes ago, Bone guy said: I think this may be a Priscacara liops. My reasoning lies in the dorsal fins. When I look at this fish I see that both dorsal fins are about the same size, the exterior is slightly larger. This is characteristic of Priscacara liops. When I look at Priscacara serrata I see the anterior dorsal fin is larger than the exterior, which doesn't match what I see on this fish. Does this sound right? It really is hard to say, as the posterior dorsals rays are not standing up, and it is mostly a stain. The anterior dorsal is not fully extended either, which negates the ability to really figure this out, in regards to fin size. Most people would probably say it is whichever is most common from the area, but Green River Formation isn't exactly a pinpoint location. I would label this as "Juvenile Priscacara, sp indet. " You could always try to e-mail Lance Grande, and see if he can be more precise about a species for this fish. 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...
Bone guy Posted May 7, 2018 Author Share Posted May 7, 2018 Well hey, it's a Priscacara. And I got it for a steal of a price. I think I can live with that. Link to comment Share on other sites More sharing options...
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