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Bruce MacFadden posted an update 7 years, 6 months ago
7 years, 6 months ago7 years, 6 months agoHi David–
I posted a message in the “What is it Forum” about some Devonian fossils shown to me by a volunteer. Might you be able to help with an ID of what makes the internal casts?
Hope all is well otherwise, thanks–Bruce
@bmacfadden
The middle plate is a spirifer, maybe Mucrospirifer. The internal casts are a bit harder. I searched the michiganbasinfossils.org site and a few look similar. Athyris and Atrypa have the thickness/roundness, but I’m unsure if they have the central ridge seen on the above specimens. Please share the site with Peter and let me know what he thinks.
Thanks David. Pete, the collector will really appreciate your help with this.