This paper proposes new synonyms and combinations for species of Bolidorhynchus, Cephalocoema, Orienscopia, Pseudastroma and Scleratoscopia; phallic complexes, seminal receptacles and distributions are illustrated. Most of the synonymized species were originally described by Dr. Salvador de Toledo Piza Jr., whose types were found in the collection of the Museu da Escola Superior de Agricultura “Luiz de Queiroz”, Piracicaba, São Paulo, Brasil.

Tetanorhynchus insignisHebard, 1931 is transferred to Bolidorhynchus; T. montanusPiza, 1977 and T. fornicatorPiza, 1981 are synonymized under Cephalocoema dubia (Mello-Leitão, 1939), and the lectotype of T. fornicator is designated; T. rostratusPiza, 1977, T. proximusPiza, 1981 and T. spitztPiza, 1981 are synonymized under Cephalocoema sica (Serville, 1839); T. guairaiPiza, 1981 is synonymized under Cephalocoema simillima (Piza, 1943); T. uruguaiensisPiza, 1977 is synonymized under Orienscopia angustirostris (Brunner von Wattenwyl, 1890); Cephalocoema multispinosaBrunner von Wattenwyl, 1890 is transferred to Pseudastroma and Cephalocoema leonardosiMello-Leitão, 1939 is synonymized under it; T. taeniatusPiza, 1981 is synonymized under Pseudastroma perducta (Mello-Leião, 1939) and Tetanorhynchus silvaiRehn, 1957 is transferred back to Scleratoscopia and T. mamanguapensisPiza, 1981 is synonymized under it.