Rineloricaria microlepidogaster:

BMNH 1884.2.5.41, holotype, 85.2 mm SL, Rio Grande do Sul, Brazil; MCP 25055, (59) 43.3-138.1 mm SL, arroio Santa Fé beside the road from Pinheiro Machado to Piratini, rio Piratini, tributary of rio São Gonçalo, Rio Grande do Sul, Brazil, November 1999, C. Lucena et al. ; MCP 25741, (4) 37.2-49.7 mm SL, rio Jacui, Rio Grande do Sul, Brazil, April 2000, R. Reis et al.; MLP 3193, (5) 37.4-66.1 mm SL, Salto Grande, Entre Ríos, Argentina, E. MacDonagh.