Ancylus neumayri Fontannes, 1880 † accepted as Ferrissia neumayri (Fontannes, 1880) † (additional source)
Dreissensia dubia (Mayer, 1871) † accepted as Dreissena dubia (Mayer, 1871) † (basis of record)
Dreissensia dubia var. rubricatica Almera & Bofill y Poch, 1894 † accepted as Dreissena dubia rubricata Almera & Bofill y Poch, 1894 † (additional source)
Helix bolivari Royo Gómez, 1922 † accepted as Iberus bolivari (Royo Gómez, 1922) † (original description)
Hydrobia (Belgrandia) Bourguignat, 1869 accepted as Belgrandia Bourguignat, 1869 (basis of record)
Hydrobia (Belgrandia) deydieri Depéret & Sayn, 1901 † accepted as Belgrandia deydieri (Depéret & Sayn, 1901) † (basis of record)
Hydrobia calderoni Royo Gómez, 1922 † (original description)
Hydrobia romani Royo Gómez, 1922 † (original description)
Limnaea bouilleti Michaud, 1855 † accepted as Stagnicola bouilleti (Michaud, 1855) † (basis of record)
Limnaea cucuronensis Fontannes, 1878 † accepted as Radix cucuronensis (Fontannes, 1878) † (basis of record)
Limnaea lartetii Noulet, 1854 † accepted as Radix dilatata (Noulet, 1854) † (basis of record)
Limnaea navarroi Royo Gómez, 1922 † accepted as Radix navarroi (Royo Gómez, 1922) † (original description)
Limnaea rouvillei Fontannes, 1879 † accepted as Limnaea bouilleti Michaud, 1855 † accepted as Stagnicola bouilleti (Michaud, 1855) † (source of synonymy)
Melania lusitanica Roman, 1907 † accepted as Melanoides lusitanica (Roman, 1907) † (additional source)
Melanopsis (Lyrcea) pachecoi Royo Gómez, 1922 † accepted as Melanopsis pachecoi Royo Gómez, 1922 † (original description)
Neritina (Neritodonta) bolivari Royo Gómez, 1922 † accepted as Theodoxus bolivari (Royo Gómez, 1922) † (original description)
Pisidium ezquerrai Royo Gómez, 1922 † (original description)
Planorbis (Anisus) matheroni P. Fischer & Tournouër, 1873 † accepted as Gyraulus matheroni (P. Fischer & Tournouër, 1873) † (basis of record)
Planorbis (Anisus) matheroni var. sulfureus Royo Gómez, 1922 † accepted as Gyraulus sulfureus (Royo Gómez, 1922) † (original description)
Planorbis (Armiger) lluecai Royo Gómez, 1922 † accepted as Armiger lluecai (Royo Gómez, 1922) † (original description)
Planorbis mantelli Dunker, 1848 † accepted as Planorbarius mantelli (Dunker, 1848) † (basis of record)
Valvata schlosseri Royo Gómez, 1922 † accepted as Horatia schlosseri (Royo Gómez, 1922) † (original description)