Bithinia procera Mayer, 1864 † accepted as Hydrobia procera (Mayer, 1864) † (original description)
Cardium fraternum Mayer, 1864 † accepted as Acrosterigma fraternum (Mayer, 1864) † (original description)
Cerithium etruscum Mayer, 1864 † accepted as Pirenella etrusca (Mayer, 1864) † (original description)
Corbula tournoueri Mayer, 1864 † (original description)
Dentalium burdigalinum Mayer, 1864 † accepted as Laevidentalium burdigalinum (Mayer, 1864) † (original description)
Dentalium lamarcki Mayer, 1864 † accepted as Antalis exlamarcki (Sacco, 1897) † (original description)
Dentalium parvum Mayer, 1864 † (original description)
Dreissenia sanensis Mayer, 1864 † accepted as Dreissensia sanensis C. Mayer, 1864 † (original description)
Dreissensia sanensis C. Mayer, 1864 † (original description)
Fasciolaria jouanneti Mayer, 1864 † accepted as Aurantilaria michelotiana (Grateloup, 1845) † (original description)
Fasciolaria raynevali Mayer, 1864 † (original description)
Fusus adolescens Mayer, 1864 † (original description)
Mactra burdigalensis Mayer, 1864 † accepted as Barymactra burdigalensis (Mayer, 1864) † (original description)
Natica burdigalensis Mayer, 1864 † (original description)
Natica saucatsensis Mayer, 1864 † (original description)
Pleurotoma mortilleti Mayer, 1864 † (original description)
Raulinia Mayer, 1864 † (original description)
Scalaria billaudeli Mayer, 1864 † accepted as Opalia billaudeli (Mayer, 1864) † (original description)
Sigaretus suturalis Mayer, 1864 † accepted as Eunaticina striatella (Grateloup, 1828) † (original description)
Syndosmya rolandae Mayer, 1864 † (original description)
Tellina aquitanica Mayer, 1864 † accepted as Bosemprella aquitanica (Mayer, 1864) † (original description)

France for Cardium fraternum Mayer, 1864 † 
France for Corbula tournoueri Mayer, 1864 † 
France for Dentalium burdigalinum Mayer, 1864 † 
France for Dentalium lamarcki Mayer, 1864 † 
France for Dentalium parvum Mayer, 1864 † 
France for Fasciolaria jouanneti Mayer, 1864 † 
France for Mactra burdigalensis Mayer, 1864 † 
France for Natica burdigalensis Mayer, 1864 † 
France for Natica saucatsensis Mayer, 1864 † 
France for Scalaria billaudeli Mayer, 1864 † 
France for Sigaretus suturalis Mayer, 1864 † 
France for Syndosmya rolandae Mayer, 1864 † 
France for Tellina aquitanica Mayer, 1864 † 
Italy for Bithinia procera Mayer, 1864 † 
Italy for Dreissensia sanensis C. Mayer, 1864 † 
Italy for Fusus adolescens Mayer, 1864 † 

 Type locality

 for Bithinia procera Mayer, 1864 †

Hills of Siena ("colline de Sienne"), Italy; Villafranchian, late Pliocene to early Pleistocene [details]