| Name | Lyngbya semiplena J. Agardh ex Gomont |
| Authorship | J. Agardh ex Gomont |
| Rank | Species |
| Placed in | Lyngbya C. Agardh ex Gomont |
| Holdings | 7 Specimens held in the Harvard University Herbaria identified as Lyngbya semiplena J. Agardh ex Gomont |
| Identification made in | [no date] (7) |