Four new species of Sphaeroderma Stephens (Coleoptera, Chrysomelidae, Galerucinae, Alticini) from Taiwan, with discussion on genus boundaries based on S.flavonotatum Chûjô and S.jungchani sp. nov.

Three new species of Sphaeroderma Stephens, 1831, S.hsui sp. nov. , S.changi sp. nov. , and S.sheipaensis sp. nov. are described based on specimens from Shei-Pa National Park, Taiwan. A fourth new species, S.jungchani sp. nov. , is described based on specimens from southern Taiwan. Delimitation of the genus is discussed based on S.flavonotatum Chûjô, 1937, which is redescribed, and the new species, S.jungchani sp. nov.