Frierson, L.S. 1928. Illustrations of Uniondae. Nautilus 41(4): 138-139. Available electronically.

Frierson, 1927. Check List N. Amer. Naiades: 44, sp. 197.
Frierson, 1928. Nautilus 41(4): 139, pl. 3, fig. 1.
Type(s): LECTOTYPE ANSP_145246, Selma, Ala.

Frierson, 1927. Check List N. Amer. Naiades: 43, sp. 195.
Frierson, 1928. Nautilus 41(4): 139, pl. 3, figs. 2-2a.
Type(s): HOLOTYPE UMMZ_80791, Cahaba River, Alabama.

Frierson, 1927. Check List N. Amer. Naiades: 38, sp. 150.
Frierson, 1928. Nautilus 41(4): 139, pl. 3, fig. 4.
Type(s): LECTOTYPE [AS HOLOTYPE] UMMZ_97047 (by R.I. Johnson, 1972: 144), Guatemala.

Frierson, 1927. Check List N. Amer. Naiades: 43, sp. 196.
Frierson, 1928. Nautilus 41(4): 139, pl. 3, fig. 3.
Type(s): FIGURED SYNTYPE UMMZ_80859, Tombigbee River, Boligee, Greene Co., Alabama.

Frierson, 1927. Check List N. Amer. Naiades: 69, sp. 309.
Frierson, 1928. Nautilus 41(4): 138, pl. 1, figs. 1-2.
Type(s): SYNTYPES UMMZ_91176, Indian Creek, McDonald Co., McDonald.

Frierson, 1927. Check List N. Amer. Naiades: 37, sp. 139.
Frierson, 1928. Nautilus 41(4): 139, pl. 2, fig. 2.
Type(s): LECTOTYPE [AS HOLOTYPE] UMMZ_108010, Rio Saja, 5 mi W Esmeralda, Guatemala.

Frierson, 1927. Check List N. Amer. Naiades: 74, sp. 321.
Frierson, 1928. Nautilus 41(4): 139, pl. 2, fig. 1.
Type(s): HOLOTYPE UMMZ_91075, Little Red R., Arkansas.

Frierson, 1927. Check List N. Amer. Naiades: 81, sp. 351.
Frierson, 1928. Nautilus 41(4): 139, pl. 2, fig. 3.
Type(s): SYNTYPE UMMZ_91179, Volusia Co., Fla.