Old descriptions of species frequently present imprecise or even non-existing toponyms. Based on comparisons of old collecting maps by HENSEL (1867), it is suggested the river basin to which belongs the material collected and designed as a new species (Rio Caí basin), namely Chilina parva Martens, 1868. The type-locality of this material, Rödersberg, can hardly be categorically affirmed, but as coordinates were raised, along other evidences, it is suggested that the actual toponym be Morro Reuter county, Rio Grande do Sul.
Chilina parva; Morro Reuter county; Reinhold Hensel; Rio Caí basin; Toponym; Rödersberg