Cyclostrema messanensis G. Seguenza, 1876 accepted as Moelleriopsis messanensis (G. Seguenza, 1876) (additional source)
Fissurisepta rostrata G. Seguenza, 1863 accepted as Cornisepta rostrata (G. Seguenza, 1863) (additional source)
Iphitus marshalli (Sykes, 1925) accepted as Iphitus tenuisculptus (G. Seguenza, 1876) (source of synonymy)
Iphitus tenuisculptus (G. Seguenza, 1876) (additional source)
Leda messanensis Jeffreys, 1870 accepted as Ledella messanensis (Jeffreys, 1870) (additional source)
Neilonella salicensis (G. Seguenza, 1877) † accepted as Pseudoneilonella salicensis (G. Seguenza, 1877) (additional source)
Nucula corbuloides G. Seguenza, 1877 accepted as Ennucula corbuloides (G. Seguenza, 1877) (additional source)
Oxystele romettensis Granata Grillo, 1877 accepted as Cirsonella romettensis (Granata Grillo, 1877) (additional source)
Pedicularia deshayesiana G. Seguenza, 1865 † (additional source)
Poromya neaeroides G. Seguenza, 1876 accepted as Cetomya neaeroides (G. Seguenza, 1876) (additional source)
Scalaria brevissima G. Seguenza, 1876 accepted as Epitonium brevissimum (G. Seguenza, 1876) (additional source)
Seguenzia monocingulata G. Seguenza, 1876 † (additional source)
Stylotrochus asperatus G. Seguenza, 1876 accepted as Iphitus tuberatus Jeffreys, 1883 (additional source)
Verticordia trapezoidea G. Seguenza, 1876 accepted as Haliris trapezoidea (G. Seguenza, 1876) (additional source)
Yoldia minima G. Seguenza, 1877 accepted as Pristigloma minima (G. Seguenza, 1877) (additional source)

Italy for Pedicularia deshayesiana G. Seguenza, 1865 † 
Italy for Verticordia trapezoidea G. Seguenza, 1876 

 Nomenclature

 for Alvania seguenzorum Bertolaso & Palazzi, 2000 †

Replacement name for Rissoa solidula Seguenza, 1876, non Philippi, 1848 [details]