Anodonta (Euphrata) bahlikiana Pallary, 1939 accepted as Anodonta vescoiana Bourguignat, 1856 (source of synonymy)
Anodonta (Pseudanodonta) albica Drouët, 1893 accepted as Pseudanodonta complanata (Rossmässler, 1835) (source of synonymy)
Anodonta bactriana Rolle, 1897 accepted as Anodonta anatina (Linnaeus, 1758) (basis of record)
Anodonta baudoniana Drouët, 1893 accepted as Anodonta anatina (Linnaeus, 1758) (source of synonymy)
Anodonta cygnea var. armenica Ovtschinnikov, 1935 accepted as Anodonta anatina (Linnaeus, 1758) (source of synonymy)
Anodonta cygnea var. balatonica Hazay, 1883 accepted as Anodonta anatina (Linnaeus, 1758) (source of synonymy)
Nodularia (Lanceolaria) bilirata E. von Martens, 1902 accepted as Lanceolaria bilirata (E. von Martens, 1902) (basis of record)
Unio abbreviatus Westerlund, 1897 accepted as Nodularia douglasiae (J. E. Gray, 1833) (basis of record)
Unio acrorrhynchus E. von Martens, 1894 accepted as Lanceolaria acrorrhyncha (E. von Martens, 1894) (basis of record)
Unio aeneus Jickeli, 1874 accepted as Unio dembeae Reeve, 1865 (source of synonymy)
Unio alexandri Kobelt & Rolle, 1895 accepted as Unio delicatus I. Lea, 1863 (basis of record)
Unio amnicus Rossmässler, 1835 accepted as Unio nanus Lamarck, 1819 (source of synonymy)
Unio ancyrensis Kobelt, 1912 accepted as Unio bruguierianus Bourguignat, 1853 (basis of record)
Unio annulatus Kobelt, 1911 accepted as Unio pictorum (Linnaeus, 1758) (basis of record)
Unio aradae R. A. Philippi, 1844 accepted as Unio mancus turtonii Payraudeau, 1826 (source of synonymy)
Unio armeniacus Kobelt, 1911 accepted as Unio mardinensis I. Lea, 1865 (basis of record)
Unio ater Nilsson, 1823 accepted as Unio crassus Philipsson, 1788 (basis of record)
Unio athesinus Adami, 1886 accepted as Unio elongatulus C. Pfeiffer, 1825 (basis of record)
Unio atrovirens Rossmässler, 1836 accepted as Unio nanus Lamarck, 1819 (basis of record)
Unio batavus f. badensis F. Haas, 1910 accepted as Unio nanus Lamarck, 1819 (basis of record)
Unio batavus var. albensis Hazay, 1885 accepted as Unio nanus Lamarck, 1819 (source of synonymy)
Unio baudoni de Folin & Bérillon, 1874 accepted as Unio pictorum (Linnaeus, 1758) (source of synonymy)
Unio berytensis Kobelt & Rolle, 1895 accepted as Unio delicatus I. Lea, 1863 (basis of record)
Unio biesianus Heude, 1877 accepted as Pseudobaphia biesiana (Heude, 1877) (basis of record)
Unio biformis Monterosato, 1896 accepted as Unio mancus Lamarck, 1819 (status source)
Unio bipartitus Monterosato, 1896 accepted as Unio mancus Lamarck, 1819 (status source)
Unio bitortus Monterosato, 1896 accepted as Unio mancus Lamarck, 1819 (status source)
Unio bivonianus Bourguignat, 1883 accepted as Unio mancus Lamarck, 1819 (status source)
Unio biwae Kobelt, 1879 accepted as Nodularia douglasiae (J. E. Gray, 1833) (basis of record)
Unio borcherdingi Bourguignat, 1889 accepted as Unio tumidus Philipsson, 1788 (basis of record)
Unio bosnensis Möllendorff, 1873 accepted as Unio nanus Lamarck, 1819 (status source)
Unio cilicicus var. adanensis Kobelt & Rolle, 1895 accepted as Unio delicatus I. Lea, 1863 (basis of record)
Unio consentaneus abnobae Kobelt, 1910 accepted as Unio nanus Lamarck, 1819 (source of synonymy)
Unio consentaneus biandeti Kobelt, 1910 accepted as Unio nanus Lamarck, 1819 (status source)
Unio consentaneus f. batavosimilis Rossmässler, 1838 accepted as Unio nanus Lamarck, 1819 (status source)
Unio macrorhynchus Borcherding, 1889 accepted as Unio borcherdingi Bourguignat, 1889 accepted as Unio tumidus Philipsson, 1788 (status source)
Unio pictorum var. battonensis Kobelt, 1894 accepted as Unio pictorum (Linnaeus, 1758) (basis of record)
Unio tumidus var. borysthenensis Kobelt, 1880 accepted as Unio tumidus Philipsson, 1788 (status source)

France for Anodonta (Pseudanodonta) albica Drouët, 1893 
Germany for Unio consentaneus abnobae Kobelt, 1910 
Hungary for Unio batavus var. albensis Hazay, 1885 
Korean Peninsula for Unio acrorrhynchus E. von Martens, 1894 
Sicily for Unio aradae R. A. Philippi, 1844 
Slovenia for Unio amnicus Rossmässler, 1835 
Turkey for Unio alexandri Kobelt & Rolle, 1895 
Turkey for Unio ancyrensis Kobelt, 1912 
Turkey for Unio cilicicus var. adanensis Kobelt & Rolle, 1895