The Collection of Medical Malacology (Fiocruz-CMM) is located at the CPqRR’s Laboratory of Helminthology and Medical Malacology (LHMM), Fiocruz/MG . The collection includes samples of mollusks from Germany, France, Argentina, Bolivia, Brazil, Chile, Colombia, Costa Rica, Cuba, Ecuador, Mexico, Paraguay, Dominican Republic, Uruguay, and Venezuela. This collection is comprised of representatives of the genera Biomphalaria Preston, 1910, Lymnaea Lamarck, 1799, Pseudosuccinea (Say, 1817), Galba d’Orbigny, 1835, Physa Draparnaud, 1801; Drepanotrema Fischer & Crosse, 1880; Helisoma Swainson, 1840; Melanoides Olivier, 1804. The fourth ones genera include, the Brazilian, intermediate hosts of the trematodes Schistosoma mansoni Sambon, 1907 and Fasciola hepatica (Linnaeus, 1758), etiological agents of schistosomiasis mansoni and fasciolosis. Fiocruz-CMM is an important collection for the national system of epidemiological control and health surveillance and is directly related to research activities and the LHMM’s National Schistosomiasis Reference Service, mostly aimed at mollusks of the Biomphalaria genus.