Troost, A.I., Rupert, S.D., Cyrus, A.Z., Paladino, F.V., Dattilo, B.F. and Peters, W.S. 2012. What can we learn from confusing Olivella columellaris and O. semistriata (Olivellidae, Gastropoda), two key species in panamic sandy beach ecosystems?. Biota Neotropica. 12, 2 (Jun. 2012).