New species of Estlandia (Clitambonitidina, Brachiopoda) in the Upper Ordovician of the East Baltic

A new species of the gonambonitid genus Estlandia, E. hispida, is described from the lower part of the Upper Ordovician in Estonia and northwestern Russia (Ingria). The new species differs clearly from the most similar species E. marginata (Pahlen) in the external sculpture, in having less convex valves, and in the stratigraphical distribution.