Two new species of Benthonellania are described and the first record of Benthonellania donmoorei Moolenbeek & Faber, 1991 is reported from Brazil. Benthonellania coronata n. sp. has less axial ribs than any other congener, absence of spiral sculpture and relatively strong nodules at adapical end of axial ribs. Benthonellania multicostata n. sp. has numerous opistocline axial ribs, no trace of adapical nodules and convex whorls profile. Multivariate conchological analysis (Cluster and Principal Component Analysis) of the two new species as well as Benthonellania xanthias (Watson, 1886) confirm the species status for the two new taxa. Alvania colombiana Romer & Moore, 1988 is confirmed to the genus Alvania.