Brachial valve
M. mucronatus is noted for the somewhat ornate exterior shell surface and obvious growth lines.
Compare this specimen to M. thedfordensis and M. arkonensis from Arkona, Canada, and Eleutherokomma diluvianoides from Poland
Monday, September 8, 2014
Mucrospirifer mucronatus brachiopod from the Silica Shale
Here is an example of the somewhat ubiquitous Mucrospirifer mucronatus from the Silica Shale (Devonian, Givetian) at Milan, MI. Mucrospirifer is a prolific member of many mid-Devonian units and are something of a index fossil.
Brachial valve
Anterior
Pedicle valve
Posterior
Profile
M. mucronatus is noted for the somewhat ornate exterior shell surface and obvious growth lines.
Compare this specimen to M. thedfordensis and M. arkonensis from Arkona, Canada, and Eleutherokomma diluvianoides from Poland
Brachial valve
M. mucronatus is noted for the somewhat ornate exterior shell surface and obvious growth lines.
Compare this specimen to M. thedfordensis and M. arkonensis from Arkona, Canada, and Eleutherokomma diluvianoides from Poland
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