The brachiopod below I believe is a
Resserella elegantula from the
Irondequoit limestone Rochester Shale near Lockport, NY. I base this upon pictures that are posted on the website
"Primitive Worlds". It is a relatively flat brachiopod and reminds me a little of the Ordovician genera
Dalmanella multisecta.
Pedicle valve
Anterior
Brachial valve
Posterior
Profile
The
Irondequoit limestone Rochester Shale is about 427 myo (Silurian, Sheinwoodian stage)
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