Maassen, W. J. M. (2003). Notes on terrestrial molluscs of the island of Sulawesi. 3. The genera Palaina, Arinia and Opisthostoma (Gastropoda, Prosobranchia, Diplommatinidae), with descriptions of a dozen new species. Basteria. 67(1/3): 47-63, figs. 1-24.
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Maassen, W. J. M.
2003
Notes on terrestrial molluscs of the island of Sulawesi. 3. The genera <i>Palaina</i>, <i>Arinia</i> and <i>Opisthostoma</i> (Gastropoda, Prosobranchia, Diplommatinidae), with descriptions of a dozen new species