Four new species of the genusRhyparus Westwood, 1845 (Coleoptera: Scarabaeidae: Aphodiinae) with modified pygidium and last abdominal ventrite in females

Authors described here four new species of the genus Rhyparus Westwood, 1845 with modified pygidium and last ventrite in females: R. bacanensis sp. nov. from Bacan Island, R. buruensis sp. nov. from Buru Island, R. fijiensis sp. nov. from Viti Levu Island and R. stebnickae sp. nov. from New Guinea Island. R. paraphilippinensis Ochi & Kakizoe, 2021 is identified as species consisting to mentioned group of species. Iconography of all known species with mentioned modifications is given. R. approximans Fairmaire, 1893, R. loebli Paulian, 1983 and R. sepikensis Stebnicka, 1998 are photographed in literature for the first time. R. loebli is recorded from Japan for the first time. Short discussion about relationships and evolution within the genus Rhyparus is given.