pearsoni, Monotocheirodon Eigenmann [C. H.] in Pearson 1924:34, Fig. 3; Pl. 11 (fig. 1) [Indiana University Studies v. 11 (no. 64); ref. 3396] Espia, Bolivia. Syntypes: (10) CAS 59792 [ex IU 15348] (7), UMMZ 66484 (4). Additional original material: CAS 70832 [ex IU 17334] (3), 70833 [es IU 17333] (now 5), 70835 [ex IU 17335] (2). •Valid as Monotocheirodon pearsoni Eigenmann 1924 -- (Chang & Ortega 1995:3 [ref. 24302], Malabarba 1998:231 [ref. 23844], Malabarba & Weitzman 2000:278 [ref. 24413], Malabarba in Reis et al. 2003:150 [ref. 27061]. Menezes et al. 2013:129 [ref. 32808], Sarmiento et al. 2014:185 [ref. 35004], Carvalho et al. 2024:8 [ref. 40982]). Current status: Valid as Monotocheirodon pearsoni Eigenmann 1924. Stevardiidae: Diapominae. Distribution: South America: Beni River drainage, Madeira River basin, Bolivia. Habitat: freshwater.