Fissiletag Posted July 30 Share Posted July 30 I just bought this green river fish and couln't figure out what species it was. It also looks like it is preserved from the bottom of the fish instead of the side. Link to post Share on other sites
Randyw Posted July 30 Share Posted July 30 What size is it? I agree its belly up. When i blow up the pictures i can make out all 4 lower fins 1 Link to post Share on other sites
Randyw Posted July 30 Share Posted July 30 Ps. I kind of think it may be diplomystus…but only 60% confidence in it… really cool! Whatever it turns out to be! Link to post Share on other sites
Fissiletag Posted July 30 Author Share Posted July 30 From the tip of the head to the tip of the tail in a straight line it's about 2 inches/ 5 cm. Link to post Share on other sites
Randyw Posted July 30 Share Posted July 30 Well now I’m less sure…. Let’s see what @Ptychodus04 has to say… Link to post Share on other sites
Fossildude19 Posted July 31 Share Posted July 31 Not a Diplomystus. Not seeing the long anal fin typical of those. More likely a Knightia eocaena, at that size. 1 Link to post Share on other sites
Randyw Posted July 31 Share Posted July 31 34 minutes ago, Fossildude19 said: Not seeing the long anal fin typical of those I was thinking I saw the remains of the long fin here.but at 2” around the curves it could easily be knightia…. 1 Link to post Share on other sites
Fossildude19 Posted July 31 Share Posted July 31 41 minutes ago, Randyw said: I was thinking I saw the remains of the long fin here.but at 2” around the curves it could easily be knightia…. The shape and location of the pectoral fins tell me this is a Knightia ... 1 Link to post Share on other sites
Fissiletag Posted July 31 Author Share Posted July 31 Correction on the length: The whole fish is around 3 inches, the distance between the head in the tail is 2 inches. Is it unusual for knightia to be preserved ventrally? I took a better photo so it should be easier to see some of the details. Link to post Share on other sites
Randyw Posted July 31 Share Posted July 31 1 hour ago, Fossildude19 said: The shape and location of the pectoral fins tell me this is a Knightia ... Oops! You’re right! The new pictures confirm it. It’s twisted more than I thought it was. A diplo fin is higher on the side than that. 1 hour ago, Fissiletag said: Is it unusual for knightia to be preserved ventrally? You get all kinds of preservation with these fish. I’ve got one partially prepped that’s preserved the exact opposite. The spine is up. I’ve got another diplo that is preserved with the head laying on its right side, the center section is flipped and laying on its left side and the tail is laying on its right side like the head all in their approximately right places otherwise 1 Link to post Share on other sites
Ptychodus04 Posted July 31 Share Posted July 31 It's definitely a Knightia. It is not uncommon for Knightias to be preserved in this state. dorsoventrally compressed isn't typical preservation but not unheard of. 1 1 Link to post Share on other sites
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