An attempt to analyse the taxonomy of the genus Solaropsis, aiming to allocate a new species collected in Rio Cajari Extractive Reserve, Laranjal do Jari, Amapá State, Brazil, revealed that a nebula of uncertainties surrounds the genus, from the family level to the validity of several species. An initial taxonomic treatment is given for some taxa herein, resulting in modifications such as S. pellisserpentis (Gmelin, 1791) as an objective synonym of S. undata ([Lightfoot], 1786); and S. cicatricata (Beck, 1853) as the oldest name of the depression-bearing species. This taxonomic treatment is intended only to allow the description of the new species. Solaropsis caperata is, thus, introduced, having as its main distinguishing features the globose shell, strongly depressed half a whorl before the peristome, slightly convex whorls, large aperture and umbilicus, and cream colour with brown spots.