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Actinonaias Fischer & Crosse, 1894
Fischer & Crosse, 1894. Miss. Sci. Mexique, Rech. Zool. 2(15): 556.
(intro'd as sub-gen. of Unio Retzius, 1788)
Type species: Unio sapotalensis Lea, 1841 (orig. desig.) = Actinonaias sapotalensis
Amphinaias Fischer & Crosse, 1894
Fischer & Crosse, 1894. Miss. Sci. Mexique, Rech. Zool. 2(15): 556.
(intro'd as sub-gen. of Unio Retzius, 1788)
Type species: Unio couchianus Lea, 1860 (orig. desig.) = Quadrula couchiana
Amygdalonaias Fischer & Crosse, 1894
Fischer & Crosse, 1894. Miss. Sci. Mexique, Rech. Zool. 2(15): 557.
(intro'd as sub-gen. of Unio Retzius, 1788)
Type species: Unio cognatus Lea, 1860 (orig. desig.) = Truncilla cognata
Barynaias Fischer & Crosse, 1894
Fischer & Crosse, 1894. Miss. Sci. Mexique, Rech. Zool. 2(15): 557.
(intro'd as sub-gen. of Unio Retzius, 1788)
Type species: Unio pigerrimus Crosse & Fischer, 1894 (orig. desig.) = Barynaias pigerrima
Brachyanodon Fischer & Crosse, 1894
Fischer & Crosse, 1894. Miss. Sci. Mexique, Rech. Zool. 2(15): 517.
(intro'd as sub-gen. of Anodonta Lamarck, 1799)
Type species: Anodonta chapalensis Crosse & Fischer, 1893 (subsequent designation) = Anodonta impura
Caenonaias Fischer & Crosse, 1894
Fischer & Crosse, 1894. Miss. Sci. Mexique, Rech. Zool. 2(15): 556 [as ‘Cænonaias’].
(intro'd as sub-gen. of Unio Retzius, 1788)
Type species: Unio aeruginosus Morelet, 1849 (orig. desig.) = Nephronaias aeruginosa
Cyrtonaias Fischer & Crosse, 1894
Fischer & Crosse, 1894. Miss. Sci. Mexique, Rech. Zool. 2(15): 556.
(intro'd as sub-gen. of Unio Retzius, 1788)
Type species: Unio berlandierii Lea, 1857 (orig. desig.) = Cyrtonaias tampicoensis
Delphinonaias Fischer & Crosse, 1894
Fischer & Crosse, 1894. Miss. Sci. Mexique, Rech. Zool. 2(15): 555.
(intro'd as sub-gen. of Unio Retzius, 1788)
Type species: Unio delphinulus Morelet, 1849 (monotypy) = Delphinonaias largillierti
Disconaias Fischer & Crosse, 1894
Fischer & Crosse, 1894. Miss. Sci. Mexique, Rech. Zool. 2(15): 556.
(intro'd as sub-gen. of Unio Retzius, 1788)
Type species: Unio discus Lea, 1838 (original designation) = Disconaias disca
Euryanodon Fischer & Crosse, 1894
Fischer & Crosse, 1894. Miss. Sci. Mexique, Rech. Zool. 2(15): 518.
(intro'd as sub-gen. of Anodonta Lamarck, 1799)
Type species: Anodon bambousearum Morelet, 1851 (sub. desig. by Haas, 1964) = Anodontites cylindracea
Graphonaias Fischer & Crosse, 1894
Fischer & Crosse, 1894. Miss. Sci. Mexique, Rech. Zool. 2(15): 557.
(intro'd as sub-gen. of Unio Retzius, 1788)
Type species: Unio medellinus Lea, 1838 (orig. desig.) = Actinonaias medellina
Leptonaias Fischer & Crosse, 1894
Fischer & Crosse, 1894. Miss. Sci. Mexique, Rech. Zool. 2(15): 557.
(intro'd as sub-gen. of Unio Retzius, 1788)
Type species: Unio ravistellus Morelet, 1849 (orig. desig.) = Nephronaias ravistella
Mesanodon Fischer & Crosse, 1894
Fischer & Crosse, 1894. Miss. Sci. Mexique, Rech. Zool. 2(15): 517.
(intro'd as sub-gen. of Anodonta Lamarck, 1799)
Type species: Anodon lurulentus Morelet, 1849 (subsequent designation) = Anodonta lurulenta
Mesonaias Fischer & Crosse, 1894
Fischer & Crosse, 1894. Miss. Sci. Mexique, Rech. Zool. 2(15): 556.
(intro'd as sub-gen. of Unio Retzius, 1788)
Type species: Unio explicatus Morelet, 1849 (orig. desig.) = Cyrtonaias explicata
Nephronaias Fischer & Crosse, 1894
Fischer & Crosse, 1894. Miss. Sci. Mexique, Rech. Zool. 2(15): 556.
(intro'd as sub-gen. of Unio Retzius, 1788)
Type species: Unio plicatulus Küster, 1856 (orig. desig.) = Nephronaias plicatula
Pachynaias Fischer & Crosse, 1894
Fischer & Crosse, 1894. Miss. Sci. Mexique, Rech. Zool. 2(15): 556.
(intro'd as sub-gen. of Unio Retzius, 1788)
Type species: Unio spheniopsis Morelet, 1849 (orig. desig.) = Pachynaias spheniopsis
Phyllonaias Fischer & Crosse, 1894
Fischer & Crosse, 1894. Miss. Sci. Mexique, Rech. Zool. 2(15): 555.
(intro'd as sub-gen. of Unio Retzius, 1788)
Type species: Unio paludosus Morelet, 1849 (orig. desig.) = Delphinonaias largillierti
Pseudoleila Fischer & Crosse, 1894
Fischer & Crosse, 1894. Miss. Sci. Mexique, Rech. Zool. 2(15): 518.
(intro'd as sub-gen. of Anodonta Lamarck, 1799)
Type species: Anodon ciconia Gould, 1851 (monotypy) = Anodontites trapesialis
Psoronaias Fischer & Crosse, 1894
Fischer & Crosse, 1894. Miss. Sci. Mexique, Rech. Zool. 2(15): 556.
(intro'd as sub-gen. of Unio Retzius, 1788)
Type species: Unio psoricus Morelet, 1851 (orig. desig.) = Psoronaias semigranosa
Pyganodon Fischer & Crosse, 1894
Fischer & Crosse, 1894. Miss. Sci. Mexique, Rech. Zool. 2(15): 518.
(intro'd as sub-gen. of Anodonta Lamarck, 1799)
Type species: Anodonta globosa Lea, 1841 (subsequent designation) = Pyganodon grandis
Simonaias Fischer & Crosse, 1894
Fischer & Crosse, 1894. Miss. Sci. Mexique, Rech. Zool. 2(15): 557.
(intro'd as sub-gen. of Unio Retzius, 1788)
Type species: Unio tabascoensis Küster, 1856 (orig. desig.) = Nephronaias tabascoensis
Sphenonaias Fischer & Crosse, 1894
Fischer & Crosse, 1894. Miss. Sci. Mexique, Rech. Zool. 2(15): 557.
(intro'd as sub-gen. of Unio Retzius, 1788)
Type species: Unio liebmanni Philippi, 1847 (orig. desig.) = Sphenonaias liebmanni