Chonetes genera brachiopods are somewhat common from the Devonian onward and they retain their Strophomenid styling. Below is a specimen of Chonetes oklahomensis from the Fayetteville shale (Carboniferous, Mississippian, Serpukhovian stage), itself a part of the Wewoka formation, of Hughes county, Oklahoma.
Pedicle valve
Anterior
Brachial valve
Posterior
Profile
Here is a group of them together.
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