Two of its bishops are historically recorded :
- Salomon, attending the (Sixth Ecumenical =) Third Council of Constantinople (680–681, which repudiated as heresies Monothelitism and Monoenergism) and probably the appended Quinisext Council, alias Council in Trullo (692, addressing matters of discipline);
- Nicephorus, listed at the Second Council of Nicaea (787, which restored the veneration of icons and repudiated iconoclasm).
When Amorium, its former fellow suffragan of Pessinus, became a Metropolitan see in the ninth century, Claneus became its suffragan. Anyhow, they remained within in the sway of the Patriarchate of Constantinople until their suppression after the Turkish conquerors installed Islam instead.
The diocese was nominally restored in 1933 as Latin Titular bishopric of Claneus (Latin) / Claneo (Curiate Italian) / Clanien(sis) (Latin adjective).
It is vacant since decades, has had only these incumbents, of the fitting Episcopal (lowest) rank :
- Francis Esser, Oblates of Saint Francis de Sales (O.S.F.S.) (German) (1949.01.13 – 1962.09.12), first as [[Apostolic Vicar of Apostolic Vicar of Keetmanshoop|Keetmanshoop]] (ex-German Namibia) (1949.01.13 – 1956), then as Coadjutor Bishop of Keimoes (South Africa) (1956 – 1962.09.12); later succeeded as Bishop of Keimoes (1962.09.12 – death 1966.12.08)
- George Henry Speltz (1963.02.12 – 1968.01.31) as Auxiliary Bishop of Diocese of Winona (USA) (1963.02.12 – 1966.04.04) and (promoted) as Coadjutor Bishop of Saint Cloud (USA) (1966.04.04 – 1968.01.31); later succeeded as Bishop of Saint Cloud (1968.01.31 – 1987.01.13).
- Hierocles. Synecdemus. p. 697.
- thus in some of the Notitiae Episcopatuum
- Richard Talbert, ed. (2000). Barrington Atlas of the Greek and Roman World. Princeton University Press. p. 62, and directory notes accompanying.
- Lund University. Digital Atlas of the Roman Empire.
- Darrouzès Jean, Listes épiscopales du concile de Nicée (787), in Revue des études byzantines, 33 (1975), p. 44.
- Heinrich Gelzer, Ungedruckte und ungenügend veröffentlichte Texte der Notitiae episcopatuum, in: Abhandlungen der philosophisch-historische classe der Bayerische Akademie der Wissenschaften, 1901, p. 539, nº 247
- Pius Bonifacius Gams, Series episcoporum Ecclesiae Catholicae, Leipzig 1931, p. 441
- Michel Lequien, Oriens christianus in quatuor Patriarchatus digestus, Paris 1740, vol; I, coll. 491-492
- Raymond Janin, lemma 'Claneus', in Dictionnaire d'Histoire et de Géographie ecclésiastiques, vol. XII, Paris 1953, col. 1061