Doubtful according to GBIF classification (Possible variant of Calothrix fasciculata C.Agardh ex Bornet & Flahault)
Calothrix parasitica (Chauvin) Thuret 1875
Homotypic synonym according to GBIF classification (Originally found in sources as accepted taxon within Calothrix C.Agardh ex Bornet & Flahault, 1886)
Calothrix parietina (Nägeli) Thuret 1875
Doubtful according to GBIF classification (Possible variant of Calothrix parietina Thur. ex Bornet & Flahault)
Calothrix pulvinata C. Agardh ex Bornet & Flahault
Doubtful according to GBIF classification (Possible variant of Calothrix pulvinata Ag.)
Calothrix scopulorum (Weber & Mohr) C. Agardh 1824
Doubtful according to GBIF classification (Possible variant of Calothrix scopulorum C.Agardh ex Bornet & Flahault)