Baker, H.B. 1922. The Mollusca collected by the University of Michigan-Walker Expedition in Southern Vera Cruz, Mexico. I. Occasional Papers of the Museum of Zoology, University of Michigan (106). 95 pp. Available electronically.
‘von Martens’ of Authors.
Simpson, 1914. Descr. Cat. Naiades: 311.
H.B. Baker, 1922. Occ. Pap. Mus. Zool. Univ. Mich. (106): ??.
(error for Arotonaias Martens, 1900)
Type species: Unio cyrenoides Philippi, 1847 = Arotonaias cyrenoides

H.B. Baker, 1922. Occ. Pap. Mus. Zool. Univ. Mich. (106): 13, pl. 1, figs. 6-7; pl. 3, fig. 22; pl. 4, figs. 20-25.
(intro'd as intra-sp. of Unio liebmanni Philippi, 1847)
Type(s): HOLOTYPE (ORIG. DESIG.) UMMZ_31904, Rio San Juan, Mexico.

H.B. Baker, 1922. Occ. Pap. Mus. Zool. Univ. Mich. (106): 29, pl. 11, fig. 53; pl. 12, fig. 53; pl. 13, figs. 51-54.
Type(s): HOLOTYPE UMMZ_34891, Rio San Juan, Mexico.

H.B. Baker, 1922. Occ. Pap. Mus. Zool. Univ. Mich. (106): 27, pl. 8, fig. 39-42.
(intro'd as intra-sp. of Unio (Lampsilis) rovirosai Pilsbry, 1900)
Type(s): HOLOTYPE (ORIG. DESIG.) UMMZ_34890, Rio San Juan, nr Haciendo de Cuatotolapam, Mexico.

H.B. Baker, 1922. Occ. Pap. Mus. Zool. Univ. Mich. (106): 20, pl. 1, fig.s 1-2; pl. 9, fig. 49; pl. 10, figs. 48-50; pl. 11, figs. 48-49.
Type(s): HOLOTYPE (ORIG. DESIG.) UMMZ_31844, Rio San Juan, Mexico.