Intensive survey of museum collections and new field collecting resulted in discovery of six new, closely related species of the Neotropical Merophysiinae. A new species of the genus Lycoperdinella Champion, L. boliviensissp. n., from Bolivia and Brazil, and five new species from Mexico for which a new genus is proposed here as Rueckeriagen. n.: R. inecol (type species), R. nigrileonis, R. ocelotl, R. puma, R. skelleyispp. n., have been discovered. Lycoperdinella, Rueckeriagen. n., L. subcaeca Champion and all new species are diagnosed, described, and illustrated. Keys to the species of Lycoperdinella and Rueckeria and a distribution map are provided. A lectotype of Lycoperdinella subcaeca Champion, 1913 is designated. Molecular barcodes of three new species of Rueckeria are provided in order to help with the identification of these taxa.
Keywords: Coccinelloidea; Entomology; Lycoperdinella; Rueckeria; new genus; new species; taxonomy.