| Species name | Common name | Distribution | Max. Length (cm) |
|---|---|---|---|
| Synarthrophyton patena (J.D. Hooker & Harvey) R.A. Townsend |
Southwest Atlantic | ||
| Synarthrophyton schmitzii (Hariot) M.L.Mendoza, S.Molina & P.Ventura, 1996 |
Southwest Atlantic and the Antarctic |