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With not a lot of new material to obsess with (broken arm) I have been going through old specimens to see if there are unfinished prepping and ID needed. Here is a set of scales/scale impressions collected in 2014 at Red Hill, late devonian (Famennian) site in Pennsylvania. Found in the shallow channel margin (red sediments) with what has been ID'd as a couple scapulocoracoids of the acanthodian, Gyracanthus (plus a fin spine). They are almost certainly sarcopterygian but not sure what clade. Has anyone, Archie? seen similar scales. Thought they might be Holoptychius but they don't look like the classic Holoptychius scales and they were not at all common in this upriver environment. Doug Rowe who oversees the site and runs the outstanding museum there, suggested they might be Rhizodont but nothing I've seen of Rhizodont scales looks anything like these. Thanks for any help.
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