The genus Borneoridion Deeleman & Wunderlich, 2011, and its type species B. spinifer Deeleman & Wunderlich, 2011, are redescribed. Five new species from North Borneo (Malaysia): B. franki sp. nov., B. maximum sp. nov., B. nikkae sp. nov., B. paradoxum sp. nov., and B. pumilum sp. nov. are described.