| Species | Name Used |
|---|---|
| Hydrolithon cymodoceae (Foslie) Penrose | Hydrolithon cymodoceae (p. ) |
| Hydrolithon farinosum (J.V. Lamouroux) D. Penrose & Y.M. Chamberlain | Hydrolithon farinosum (p. ) |
| Hydrolithon onkodes (Heydrich) Penrose & Woelkerling | Hydrolithon onkodes (p. ) |
| Lithophyllum chamberlainianum Woelkerling & Campbell | Lithophyllum chamberlainianum (p. ) |
| Lithophyllum pustulatum (J.V.Lamouroux) Foslie, 1904 | Lithophyllum pustulatum (p. ) |
| Lithophyllum stictaeforme (J.E. Areschoug) Hauck | Lithophyllum bermudense (p. ) |
| Mesophyllum engelhartii (Foslie) Adey | Mesophyllum engelhartii (p. ) |
| Neogoniolithon brassica-florida (Harvey) Setchell & Mason | Neogoniolithon brassica-floridum (p. ) |
| Pneophyllum coronatum (Rosanoff) Penrose | Pneophyllum caulerpae (p. ) |
| Pneophyllum fragile Kützing | Pneophyllum fragile (p. ) |