| Name | Calothrix cystosirae Schiffner |
| Authorship | Schiffner |
| Rank | Species |
| Placed in | Calothrix C. Agardh ex Bornet & Flahault |
| Holdings | 1 Specimen held in the Harvard University Herbaria identified as Calothrix cystosirae Schiffner |
| Identification made in | [no date] (1) |
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