- FOLCO GIUSTI & GIUSEPPE MANGANELLI (1990) Ciliellopsis oglasae, a new Hygromiid from Montecristo Island (Tuscan Archipelago, Italy) (Pulmonata: Helicoidea)¹
- KEPA ALTONAGA (1990) A new species from the Iberian Peninsula: Oxychilus (Ortizius?) basajaunan. sp. (Pulmonata: Zonitidae)
- R. C. PREECE (1990) The occurrence of the genus Neumayria (Gastropoda: Bithyniidae) in the British Lower Pleistocene
- R. C. PREECE (1990) The molluscan fauna of Late Devensian loess from Reculver, Kent
- MARY B. SEDDON (1990) Undescribed Quaternary land-snail species from SW Porto Santo (Madeiran Islands) (Mollusca: Gastropoda)
- A. J. DE WINTER (1990) On some small West African land snails (Gastropoda: Pulmonata)
- JANICE M. LIGHT & JOHN M. BAXTER (1990) LEPTOCHITON SCABRIDUS (JEFFREYS, 1880) - A LIVE RECORD FROM COUNTY DONEGAL, IRELAND
