Homotypic Synonyms See Note

Basionym Name:
Calicium chlorellum Ach., Methodus, Sectio prior (Stockholmiæ): 95 (1803)

Homotypic synonyms:
Calicium phaeocephalum f. chlorellum (Ach.) Fr., Lich. eur. reform. (Lund): 395 (1831)
Calicium phaeocephalum subsp. chlorellum (Ach.) Nyl., in Norrlin, Meddn Soc. Fauna Flora fenn. 1: 9 (1876)
Calicium phaeocephalum var. chlorellum (Ach.) Fr., Lich. eur. reform. (Lund): 349 (1831)
Chaenotheca chlorella (Ach.) Müll. Arg., Mém. Soc. Phys. Hist. nat. Genève 16(2): 360 (1862)
Chaenotheca chlorella f. chlorella (Ach.) Müll. Arg., Mém. Soc. Phys. Hist. nat. Genève 16(2): 360 (1862)
Chaenotheca chlorella var. chlorella (Ach.) Müll. Arg., Mém. Soc. Phys. Hist. nat. Genève 16(2): 360 (1862)
Chaenotheca phaeocephala var. chlorella (Ach.) Th. Fr., Nova Acta R. Soc. Scient. upsal., Ser. 3 3: 351 (1861)
Cyphelium chlorellum (Ach.) A. Massal., Nuovi Ann. Sci. nat. Bologna, Ser. 3 7: 224 (1853)
Cyphelium chlorellum var. chlorellum (Ach.) A. Massal., Nuovi Ann. Sci. nat. Bologna, Ser. 3 7: 224 (1853)
Cyphelium phaeocephalum var. chlorellum (Ach.) Kremp., Denkschr. Kgl. Bayer. Bot. Ges., Abt. 2 4: 270 (1861)
Phacotium chlorellum (Ach.) Poetsch, in Poetsch & Schiedermann, System. Aufzähl. samenlos. Pflanzen (Krypt.): 176 (1872)
Phacotium phaeocephalum var. chlorellum (Ach.) Trevis., Flora, Regensburg 45(1): 5 (1862)