Annotated list of type specimens of mollusks deposited in Museu de Zoologia da Universidade de São Paulo, Brazil

Type specimens representing 306 species were researched, deposited at the malacological collection of the Museu de Zoologia da USP. The data on the type specimens are here presented in alphabetical order of specific epithet, another list is presented based on the authorship of the species, and an additional systematic list. In the former list the data on the species are presented in annotated and syntetic way, mainly original and present taxonomical status, list of specimens, and other pertinent data. Most specimens are illustrated, except for those representing Brazilian land and freshwater species, which are published in a recent catalogue (Simone, 2006).