Raven, J. G. M.: Notes on molluscs from NW Borneo 6. Bufonaria borneensis spec. nov. (Gastropoda, Caenogastropoda, Bursidae). Raven, J. G. M.: After more than 100 years being considered a mollusc, Acmaea semicornea Preston, 1908 (Acmaeidae) turns out to be a brachiopod. Raven, J. G. M.: Notes on molluscs from NW Borneo 7. Babyloniidae (Gastropoda, Neogastropoda). Raven, J. G. M.: Notes on molluscs from NW Borneo 8. Stromboidea (Gastropoda, Caenogastropoda). Addendum, including the description of two new genera and new extinct species. Raven, J. G. M.: Notes on molluscs from NW Borneo 9. Harpidae (Neogastropoda), with the description of Asiaharpa sarawakiana gen. nov., spec. nov. Raven, J. G. M.: The Donacidae (Bivalvia, Tellinoidea) from the South China Sea and East Asia, with the rediscovery of some forgotten taxa and the description of two new species. Ter Poorten, J. J.: Microcardium pseudonomurai spec. nov. and Microcardium pseudocancellatum spec. nov., two new deep water cockles from the Indo-West Pacific wit a note on the status of Trifaricardium (Bivalvia, Cardiidae). Hoeksema, D. F. & Simons, G. F.: Erratum to: Skenea wesselinghi spec. nov., a new marine gastropod from the Pliocene of the southern North Sea Basin (Vetigastropoda, Trochoidea, Skeneidae), published in Vita Malacologica 19, December 2020. New taxa: Bufonaria borneensis n. sp., Babylonia edigitenbergeri n. sp., Babylonia sarawakiana n. sp., Onustus undosus n. sp., Stellaria striatissima n. sp., Terebellum humilispirum n. sp., Varicospira bekenuensis n. sp., Varicospira reticulata n. sp., Alatostrombus n. gen., Alatostrombus acutalatus n. sp., Laevispira n. gen., Laevispira seriaensis n. sp., Asiaharpa sarawakiana n. gen., n. sp., Donax (Deltachion) spiniferus n. sp., Tentidonax borneensis n. sp., Microcardium pseudonomurai n. sp., Microcardium pseudocancellatum n. sp.
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