Anodontites clessini Ortmann, 1921
‘Fischer’ Ortmann, 1921. Mem. Carnegie Mus. 8: 594.
(misidentified reference to Mycetopus clessini Fischer, 1890)

Anodontites (s.s.) hasemani Ortmann, 1921
Ortmann, 1921. Mem. Carnegie Mus. 8: 609, pl. 42, figs. 6-7.
Type(s): LECTOTYPE CM_61.5832 (by R.I. Johnson, 1977: 237), headwaters of the Rio Paraguay, Santa Rita, Matto Grosso, Brazil.

Anodontites (s.s.) hyrioides Ortmann, 1921
Ortmann, 1921. Mem. Carnegie Mus. 8: 604, pl. 42, figs. 3-5.
Type(s): LECTOTYPE CM_61.5829 (by R.I. Johnson, 1977: 237), Rio Tapajós, Santarem, Pará, Brazil.

Diplodon berthae Ortmann, 1921
Ortmann, 1921. Mem. Carnegie Mus. 8: 528, pl. 38, figs. 1-4; pl. 46, fig. 6.
Type(s): LECTOTYPE CM_61.5865 (by R.I. Johnson, 1977: 236), Rio Jacuhy, Cachoeira, Rio Grande do Sul, Brazil.

Diplodon decipiens Ortmann, 1921
Ortmann, 1921. Mem. Carnegie Mus. 8: 499, pl. 36, figs. 3-6; pl. 45, fig. 4; pl. 47, fig. 7; text fig. 4e.
Type(s): LECTOTYPE CM_61.9253 (by R.I. Johnson, 1977: 236), creek of Rio Iguassu, Serrinha, Parana, Brazil.

Diplodon enno Ortmann, 1921
Ortmann, 1921. Mem. Carnegie Mus. 8: 531, pl. 38, figs. 5-7; pl. 46, fig. 7.
Type(s): LECTOTYPE CM_61.9264 (by R.I. Johnson, 1977: 237), Rio Grande, Boqueirao, Bahia, Brazil.

Diplodon hildae Ortmann, 1921
Ortmann, 1921. Mem. Carnegie Mus. 8: 514, pl. 36, fig. 7; pl. 37, figs. 1-3; pl. 46, fig. 3; text fig. 4i.
Type(s): LECTOTYPE CM_61.5864 (by R.I. Johnson, 1977: 237), Rio Jacuhy, Cachoeira, Rio Grande do Sul, Brazil.

Diplodon simillimus Ortmann, 1921
Ortmann, 1921. Mem. Carnegie Mus. 8: 495, pl. 35, figs. 3-6; pl. 45, fig. 2; text fig. 4c.
Type(s): LECTOTYPE CM_61.9250 (by R.I. Johnson, 1977: 239), Rio Nhundiaquara, Morretes, Paraná, Brazil.

Diplodon vicarius Ortmann, 1921
Ortmann, 1921. Mem. Carnegie Mus. 8: 497, pl. 35, figs. 7-8; pl. 36, figs. 1-2; pl. 45, fig. 3; text fig. 4d.
Type(s): LECTOTYPE CM_61.9251 (by R.I. Johnson, 1977: 239), creek Aqua Quente, 8 miles W of Iporanga, Sao Paulo, Brazil.

Diplodon (s.s.) hasemani Ortmann, 1921
Ortmann, 1921. Mem. Carnegie Mus. 8: 478, pl. 34, figs. 1-4; pl. 47, fig. 5; text fig. 4a.
Type(s): LECTOTYPE CM_61.5857 (by R.I. Johnson, 1977: 238), Rio Guaporé, near Rio Sao Simao, Matto Grosso, Brazil.

Diplodon (s.s.) imitator Ortmann, 1921
Ortmann, 1921. Mem. Carnegie Mus. 8: 491, pl. 34. figs. 5-7; pl. 35, figs. 1-2; pl. 45, fig. 1; pl. 47, fig. 6; text fig. 4b.
Type(s): LECTOTYPE CM_61.9248 (by R.I. Johnson, 1977: 238), Rio Vaccacahy-Mirim, Santa Maria, Rio Grande do Sul, Brazil.

Diplodon (s.s.) mogymirim Ortmann, 1921
Ortmann, 1921. Mem. Carnegie Mus. 8: 520, pl. 37, figs. 4-7; pl. 46, fig. 5; pl. 48, fig. 2; text fig. 4k.
Type(s): LECTOTYPE CM_61.9260 (by R.I. Johnson, 1977: 238), Creek near Mogy Mirim, Sao Paulo, Brazil, tributary to Rio Mogy Guassú and Rio Grande, upper Paraná drainage.

Monocondylaea hollandi Ortmann, 1921
Ortmann, 1921. Mem. Carnegie Mus. 8: 585, pl. 41,fig. 1.
Type(s): HOLOTYPE (ORIG. DESIG.) CM_61.5846, Rio Guaporé, near Rio Sao Simao, Matto Grosso, Brazil.

Monocondylaea obesa Ortmann, 1921
Ortmann, 1921. Mem. Carnegie Mus. 8: 583, pl. 40, figs. 4-6.
Type(s): LECTOTYPE CM_61.5850 (by R.I. Johnson, 1977: 238), Rio Tapajós, Santarem, Pará, Brazil.

Unio laevigatus Say, 1834
‘Rafinesque’ of Authors.
Say, 1834. Amer. Conch. 6: [no pagination].
Conrad, 1834. New Fresh-Water Shells: 70.
Ferussac, 1835. Mag. Zool. 5: 28.
Lea, 1836. Synopsis Fam. Naiades: 59.
Lea, 1852. Synopsis Fam. Naiades: 57.
Conrad, 1853. Proc. Acad. Nat. Sci. 6: 251.
Ortmann, 1921. Mem. Carnegie Mus. 8: 92.
(error for Unio (Aximedia) levigata Rafinesque, 1820)