Contrasting with the small brachiopod in yesterday's post, today I have
Meristella obtusa from the Silurian aged (Wenlock epoch, Sheinwoodian to Homerian stage) Wenlock formation, near Dudley, England. The shell is smooth and round, about the same ratio wide as it is long. There is a wide but shallow sulcus and a heavily recurved umbo on the pedicle valve.
Brachial valve
Anterior
Pedicle valve
Posterior
Profile
I have featured several species of Meristella on my blog before like
Meristella atoka from the Haragan formation,
Meristella haskinsi from the Centerfield mbr. of the Ludlowville formation, and
Meristella arcuata from the Onondoga limestone.
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