Leptaena sp. brachiopod from St. Petersburg, Russia

Another of my recently acquired fossils from Ordovician of St. Petersburg, Russia is this Leptaena sp. brachiopod.  Looking through the Baltoscandian Fossils website there are a large number of species listed for this genera. Based on the shape of the shell this could be Leptaena rhomboidalis.

Pedicle valve

Anterior (note that the left side of the valve is broken away)

Right profile

Posterior