The collection of terrestrial mollusks, made up of specimens collected by Marià Faura i Sans (1886–1941) and Artur Bofill-Poch (1846–1929), was studied by one of the most eminent representatives of the Catalan malacological school, Miguel Bech Taberner (1919–2006).

For its part, the Casamor collection stands out both for its breadth and for the rigor with which its nomenclature was studied.

The reverend Leandro Casamor (1920–1997) was a prominent collector of marine fauna, especially from the Mediterranean. It is also worth mentioning the malacological section from the collections of the Club Muntanyenc Barcelonès, assembled by Joan Vilella. It contains numerous specimens donated and determined by Juan María Viader Garí-Montllor, who also significantly enriched the MGSB collections with valuable contributions.