Required for ciliation. Recruits the RABL2B GTPase to the ciliary base to initiate ciliation. Associates with the mother centriole in early interphase. Localizes to spindle poles during mitosis, and to distinct foci oriented towards the midbody at telophase. Localizes slightly apical to the subdistal appendage on the mother centriole, but below the distal appendage. Belongs to the CEP19 family.