De orde Bryopsidales J.H. Schaffner kent 12 families.
| Bryopsidaceae Bory | Derbesiaceae Hauck |
Pseudocodiaceae L. Hillis-Colinvaux |
| Caulerpaceae Kützing |
Dichtomosiphonaceae Chadefaud ex G.M. Smith |
Pseudoudoteaceae Dragastan, Richter, Kube, Popa, Sarbu & Ciugulea |
| Chaetosiphonaceae Blackman & Tansley |
Halimedaceae Link |
Rhipiliaceae Dragastan, Richter, Kube, Popa, Sarbu & Ciugulea |
| Codiaceae Kützing |
Ostreobiaceae P.C. Silva |
Udoteaceae J. Agardh |
