Poelagus marjorita is the only one specie of the Poelagus genus.
This specie is very similar to Pronolagus rupestris but their habitats are quiet different.
Actually Poelagus marjorita are grass-hares and Pronolagus rupestris are called rockhares because of their habitat, they live in stony and rocky zones.
NB: every species on the genus Pronolagus are rockhares.