Anodonta mutabilis Clessin, 1877 accepted as Anodonta cygnea (Linnaeus, 1758) (original description)
Anodonta mutabilis var. anatina (Linnaeus, 1758) accepted as Anodonta anatina (Linnaeus, 1758) (basis of record)
Anodonta mutabilis var. cygnea (Linnaeus, 1758) accepted as Anodonta cygnea (Linnaeus, 1758) (basis of record)
Bythinella schmidtii var. bavarica Clessin, 1877 accepted as Bythinella bavarica Clessin, 1877 (original description)
Limnaea (Gulnaria) ampla W. Hartmann, 1821 accepted as Ampullaceana balthica (Linnaeus, 1758) (basis of record)
Limnaea (Gulnaria) ampla var. heldii Clessin, 1877 accepted as Ampullaceana balthica (Linnaeus, 1758) (original description)
Limnaea (Gulnaria) auricularia var. albescens Clessin, 1873 accepted as Radix auricularia (Linnaeus, 1758) (basis of record)
Limnaea (Gulnaria) auricularia var. contracta Clessin, 1877 accepted as Ampullaceana ampla (W. Hartmann, 1821) (original description)
Limnaea (Gulnaria) mucronata Held, 1836 (basis of record)
Limnaea (Gulnaria) mucronata var. alpestris Clessin, 1877 accepted as Radix auricularia (Linnaeus, 1758) (original description)
Limnaea (Gulnaria) mucronata var. alpestris bartolomaea Clessin, 1877 accepted as Radix auricularia (Linnaeus, 1758) (original description)
Limnaea (Limnus) Montfort, 1810 accepted as Lymnaea Lamarck, 1799 (basis of record)
Limnaea (Limnus) stagnalis (Linnaeus, 1758) accepted as Lymnaea stagnalis (Linnaeus, 1758) (basis of record)
Limnaea (Limnus) stagnalis var. ampliata Clessin, 1877 accepted as Lymnaea stagnalis (Linnaeus, 1758) (original description)
Limnaea (Limnus) stagnalis var. angulosa Clessin, 1877 accepted as Lymnaea stagnalis (Linnaeus, 1758) (original description)
Limnaea (Lymnophysa) [sic] accepted as Stagnicola Jeffreys, 1830 (additional source)
Limnaea (Lymnophysa) peregra (O. F. Müller, 1774) accepted as Peregriana peregra (O. F. Müller, 1774) (basis of record)
Limnaea (Lymnophysa) peregra var. attenuata Clessin, 1877 accepted as Peregriana peregra (O. F. Müller, 1774) (original description)
Limnaea (Lymnophysa) peregra var. curta Clessin, 1877 accepted as Peregriana peregra (O. F. Müller, 1774) (original description)
Limnaea (Lymnophysa) peregra var. elongata Clessin, 1877 accepted as Peregriana peregra (O. F. Müller, 1774) (original description)
Pupa (Edentulina) Clessin, 1876 accepted as Columella Westerlund, 1878 (original description)
Pupa (Pagodulina) Clessin, 1876 accepted as Pagodulina Clessin, 1876 (original description)
Pupa muscorum var. elongata Clessin, 1876 accepted as Pupilla muscorum (Linnaeus, 1758) (original description)
Unio pseudolitoralis Clessin, 1877 accepted as Unio crassus Philipsson, 1788 (original description)
Vitrella Clessin, 1877 accepted as Bythiospeum Bourguignat, 1882 (original description)
Vitrella puerkhaueri Clessin, 1877 accepted as Bythiospeum puerkhaueri (Clessin, 1877) (original description)
Vitrella turrita Clessin, 1877 accepted as Bythiospeum turritum (Clessin, 1877) (original description)