Calothrix W.Fitzg. orth. var. Calycothrix Meisn. nom. illeg., nom. superfl. Calycothrix A. Octandra Schauer nom. inval., nom. nud. Calycothrix B. Decandrae Schauer nom. inval., nom. nud. Calycothrix C. Icosandrae Schauer nom. inval., nom. nud. Calycothrix I. Exstipulatae Schauer nom. inval., nom. nud. Calycothrix II. Stipulatae Schauer nom. inval., nom. nud. Calycothrix sect. Brachychaetae Nied. legitimate Calycothrix Meisn. sect. Calycothrix legitimate Calycothrix sect. Coilosiphon F.Muell. nom. inval., nom. nud. Calycothrix sect. Lhotskya (Schauer) F.Muell. legitimate Calycothrix sect. Lhotzkya F.Muell. orth. var. Calycothrix sect. Macrochaetae Nied. nom. inval. Calycothrix sect. Plerosiphon F.Muell. legitimate Calythrix DC. orth. var. Calythrix sect. Brachychaetae C.A.Gardner orth. var. Calythrix sect. Coelotrachylae J.M.Black orth. var. Calythrix sect. Eucalythrix Kuntze nom. inval. Calythrix sect. Lhotskya Kuntze orth. var. Calythrix sect. Lhotzkya Kuntze orth. var. Calythrix sect. Macrochaetae C.A.Gardner orth. var. Calythrix sect. Stereotrachylae J.M.Black orth. var. Calythropsis C.A.Gardner legitimate Calytrhix A.Rich. orth. var. Calytrix sect. Brachychaetae (Nied.) C.A.Gardner legitimate Calytrix Labill. sect. Calytrix legitimate Calytrix sect. Coelotrachylae J.M.Black legitimate Calytrix sect. Lhotskya (Schauer) Kuntze legitimate Calytrix sect. Macrochaetae C.A.Gardner legitimate Calytrix sect. Stereotrachylae J.M.Black legitimate Lhotskya Schauer legitimate Lhotzseya Endl. orth. var. Trichocalyx Schauer nom. rej.