| Name | Calothrix confervicola (Dillwyn) C. Agardh |
| Authorship | (Dillwyn) C. Agardh |
| Rank | Species |
| Placed in | Calothrix C. Agardh ex Bornet & Flahault |
| Holdings | 3 Specimens held in the Harvard University Herbaria identified as Calothrix confervicola (Dillwyn) C. Agardh |
| Identification made in | [no date] (3) |