Type catalog of the freshwater mussels (Mollusca: Bivalvia: Unionida) in the collection of the Senckenberg Research Institute and Natural History Museum in Frankfurt am Main, Germany

The type material of freshwater mussels, Unionida, present in the collection of the Senckenberg Research Institute and Natural History Museum, Frankfurt am Main, is listed alphabetically under the respective subfamilies.Where necessary, the status of the individual lots is discussed and corrected.Additional taxonomically important material is also mentioned.The current systematic status of each taxon is given, and all taxa are listed with their current generic affiliation.There are 895 lots of type material present, including paratypes and paralectotypes, with a total of 2506 specimens.Primary types account for 455 lots, and all holo-, lecto-, and neotypes (249) are illustrated.There are 130 taxa represented by syntype lots.As a result of the collection revision, 31 nominal taxa were relegated to synonymy, and type material of a further 6 taxa was reassessed.In addition, 1 lectotype was designated and 1 taxon was revalidated.