A new genus of hypogean Ostracoda, Marococandona nov. gen. from wells and springs in the Guelmin and Agadir regions(Southern Morocco) is described. This genus is close to the genus Candonopsis, but can be distinguished from this latter by severalcharacteristics : the rectangular shape of the carapace, the reduction of the antenna chaetotaxy, the lack of sexual dimorphismin the male antenna, the lack of setae on the protopodite of the second thoracopod, and on the two first articles of the third thoracopodendopodite. M. danielopoli n. sp. has primitive characters, with a normally segmented antennula, a ‘t’ seta on the antenna,and normally developed furcal claws. In contrast, the morphology of M. nicolae n. sp. is regressed, with a 5 segmentedantennula, no ‘t’ setae on the antenna, and a reduced furca. The two species live in highly mineralised water and seem poorlysensitive to groundwater pollution.