A protein complex which assembles on the mother centriole during cilium formation, adjacent and proximal to a centriolar distal appendage. In human, it contains ODF2, CNTRL, NIN, CCDC120c and CCDC68. [ http://www.ncbi.nlm.nih.gov/pubmed/28422092 GOC:cilia http://www.ncbi.nlm.nih.gov/pubmed/23213374 http://www.ncbi.nlm.nih.gov/pubmed/27818179 ]
Synonyms: subdistal appendage of mother centriole subdistal appendage of centriole subdistal appendage of basal body