Two New Species of Unionid Mussels (Bivalvia: Unionidae) from Korea

Abstract

Two new species of unionid mussels are described as Pronodularia seomjinensis and Inversiunio verrucosus from the Seomjin River, Jeollabuk-do, Korea. P. seomjinensis differs from related species in having a smooth surface, and I. verrucosus in having a warty sculpture and coarse radial ribs on the posterior slope. I. verrucosus also resembles P. japanensis very closely, but they differ in the shape of the glochidium.