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  • Isaac E. Pope posted a new specimen. 1 year, 10 months ago

    1 year, 10 months ago
    1 year, 10 months ago

    Isaac E. Pope has contributed specimen mFeM 58455 to myFOSSIL!

    • Hi, @i-edwards – are you sure this was found in Oligocene rocks? It looks very similar to other brachiopods I have found that went extinct in the Permian, namely Lepidocyclus and Hiscobeccus. PBDB is suggesting maybe there are some Oligocene occurrences: http://fossilworks.org/bridge.pl?a=taxonInfo&taxon_no=86574 but it jumps from the Devonian to the Oligocene, which seems unreasonable to me. Let me know what you think, Jen

      • Hello @jbauer, thank you for your comment! I was just about to ask you about this specimen’s identity. Actually, I found this in a fairground parking lot and off the top of my head I thought it resembled some Oligocene brachiopods here in Washington State, but after looking more into it I doubt that it is local. I will update it and if you have any more info I greatly look forward to reading it!

        • Let me tag in @mackenzie-smith who is more familiar with PNW fossils to chime in on the potential origin. I’ve collected similar looking fossils from the Ordovician – but certainly they extend beyond that time period. Oligocene just seems a bit too far – but I’m not super familiar with brachiopods outside of the Paleozoic.

      • @jbauer and @i-edwards Get ready for a long answer! WA has rocks from almost every period in the Phanerozoic. The PBDB also has a lot of omissions from PNW fossils since many of the original collections were USGS, have been lost or were never cataloged into PBDB. So it would not surprise me if this was an Oligocene occurrence that is not it PBDB. Likewise, it wouldn’t surprise me if it was older. Furthermore, Rhynchonellida (the order this fossil belongs to) extends into the present day and perhaps this could be a different genus. There are living braciopods in Friday Harbor (near Seattle) and three species of braciopods from the Miocene of Oregon (two are in Terebratulida though and the rhynchonellid surprisingly lacks the ribbing that most rhynchonellids have). Where this is from a fairground though it is also very likely that this was a bought or given away at a rock, mineral and gem show and then lost so the original locality and time is unknown.

        • Yay! I love long answers! Thanks, @mackenzie-smith. I figured there was a lot of information ‘missing’ from all the online databases in terms of specimens & lithologic information.

          From what I remember the strong ribbing decreases through time – which was the first big trigger for me that maybe something was a bit off. I can try to track down an image of the Italian Oligocene specimens!