| Name | Homoeocladia sigmoidea (Nitzsch) Elmore |
| Authorship | (Nitzsch) Elmore |
| Rank | Species |
| NomenclaturalStatus | LaterHomonym |
| Placed in | Homoeocladia C. Agardh |
| Remarks | non W. Smith (1856) |
| Citation | 1921 Univ. Stud. Univ. Nebraska 21: 136 |
| Name | Homoeocladia sigmoidea (Nitzsch) Elmore |
| Authorship | (Nitzsch) Elmore |
| Rank | Species |
| NomenclaturalStatus | LaterHomonym |
| Placed in | Homoeocladia C. Agardh |
| Remarks | non W. Smith (1856) |
| Citation | 1921 Univ. Stud. Univ. Nebraska 21: 136 |