Historically, the dodo was assigned the genus "Didus", now a junior synonym of "Raphus". In 1848, a new species within the now defunct genus "Didus", "D. nazarenus", was named by Hugh Edwin Strickland and Alexander Gordon Melville. To house their new species, as well as the other species known at the time, Strickland and Melville named the subfamily Didinae. In 1893 three species were assigned to the group "Pezophaps solitarius", "Didus ineptus", and the possible species "Didus borbonicus". Today, only two raphine species are known, with "Didus ineptus" becoming a junior subjective synonym of "Raphus cucullatus"; "Didus? borbonicus" now classified as the ibis "Threskiornis solitarius"; and "Didus nazarenus" being identified as synonymous with "Pezophaps solitarius".