It appears most are Platystrophia ponderosa brachiopods.
Maybe 3 or so (near bottom left corner of image) could be Platystrophia cypha with its high arching like fins in the shell.
Two brachiopods on the far left column and in its middle are probably Hebertella brachiopods with the fine lines on the shell. The Ohio Fossils book (Bulletin 54 from Ohio Geological Survey, 1955) lists 3 species for Hebertella: Hebertella sinuata, Hebertella occidentalis, and Hebertella insculpta.
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The name Platastrophia ponderosa has been changed for thses: now called Vilandrostrophia ponderosa for the largest. Smaller are still Vilandrostrophia, but other species.Just came from that site, and looked up info. I will try to send another comment with the internet website with this information.
"The name changed. Vinlandostrophia ponderosa used to be called Platystrophia ponderosa. The genus name was changed to Vinlandostrophia in 2007 by Zuykov and Harper, who studied specimens of the genus from around the world. They found that the original type specimen of the genus and several important early fossils upon which subsequent descriptions of the genus were based had been lost. They determined that several distinct genera should be split from what had been called Platystrophia. One of the new genera names they proposed was Vinlandostrophia. “Vinland” is from the Viking name for the eastern coast of Canada. Platystrophia ponderosa was designated as the type specimen for the new genus, Vinlandostrophia. Hence, the brachiopod is now called Vinlandostrophia ponderosa." http://www.uky.edu/KGS/fossils/fossil-month-07-2018-vinlandostropia.php
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