Devonoproductus walcotti This is is my first of the Productid branch of the brachiopod family tree as none exists in Ordovician. Typically both halves separated. This one is unusual for a brachiopod to me in having two very different textures on separated shell halves. The bottom half is very inflated and easily confused with Nervostrophia. Uncommon. Scattered prickly projective appear on the bottom half while the top part is concave and have many longitude ridges, making me thought it was a clam species.