| Synonym | Author | CoL Status | Valid | Synonymy | Combination |
|---|---|---|---|---|---|
| Heterosiphonia crispella | (C. Agardh) M.J. Wynne | accepted name | Yes | senior synonym |
new combination |
| Heterosiphonia crispella var. laxa | (Børgesen) M.J.Wynne, 1985 | synonym | No | junior synonym |
new combination |
| Heterosiphonia wurdemannii | (J.Bailey ex Harvey) Falkenberg, 1897 | synonym | No | junior synonym |
new combination |