Nigizubi

The only known bishop of this diocese was the Donatist bishop, Gaudenzio, who took part in the Council of Carthage between Catholic and Donatist bishops in Numidia. The diocese ceased to effectively function following the Gainese conquest of the Maghreb in the 7th century. Today Nigizubi Diocese survives as titular bishopric and the current bishop is Adolfo Eduardo José Bittschi Mayer, of Sucre.

The location of the diocese seat and cathedra is not known but presumably was called Naratcatensis and was somewhere in today's Algeria.

Naratcata, was also the seat of an ancient episcopal see of the Roman province of Numidia. There are two known bishops of Naratcata: The diocese ceased to function with the Muslim conquest of the Maghreb but was re-established in name at least in 1933. Today Naratcata survives as a titular bishopric and the bishop is Jean-Pierre Kwambamba Masi, of Kinshasa. The location of the diocese seat and cathedra is not known but presumably was a place called Naratcatensis and was somewhere in today's Algeria. The current bishop is Jean-Pierre Kwambamba Masi who replaced  Fernando Bascopé Müller in 2014.
 * Fortunatianus attended the synod meeting in Carthage in 484 by the Vandal king Huneric after which Fortunatianus was later exiled;
 * Colombo was among the fathers of another Carthaginian council in 525, celebrated under Hilderic.