Revision of the genus Bourciera Pfeiffer, 1852 (Gastropoda: Helicinidae), with the description of six new species from Ecuador and Peru

A revision of all known Bourciera Pfeiffer, 1852 species is provided and six species are described as new to science: Bourciera amazonensis sp. nov., Bourciera curvidigitata sp. nov., Bourciera distincta sp. nov., Bourciera imbaburensis sp. nov., Bourciera intermedia sp. nov. and Bourciera ovata sp. nov. Based on new material and observations the status of B. viridissima Miller, 1879 is clarified and the first photographs of this species are presented. In addition to these, new locality data is reported for most species, the first record of Bourciera from Colombia is provided and the known distribution of the genus is extended far into the Amazon.