Crouania attenuata (C. Agardh) J. Agardh var. australis Harvey, 1855b: 558 (type locality: King George Sound, Western Australia).
Ptilocladia australis (Harvey) Wollaston, 1968: 265.—Kendrick, Walker, & McComb, 1988: 205, table 1.— Huisman et al., 1990: 96.— Kendrick, Huisman, & Walker, 1990: 52.
INDIAN OCEAN DISTRIBUTION: Australia.