Abstract
A new genus, Longacerus gen. nov., and two new species, Longacerus girajfa sp. n. an.ol Pseudacerus sabahensis sp. n. are described from Sabah (Borneo). The lectotype is designated fox Pseudacerus furcatus Raffray, 1895. A key to genera of Mastigerinaand a key to species of the genus Pseudacerus Raffray, 1895 are given. A current taxonomic concept of the suprageneric taxa of the supertribe Clavigeritae is provided.