Hypnea planicaulis Harvey, 1859b: 315 (type locality: Georgetown, Tasmania).
Calliblepharis planicaulis (Harvey) Kylin, 1932: 44.—Womersley, 1994: 410, 413.
INDIAN OCEAN DISTRIBUTION: Australia.
Note: This species was distributed under the name Hypnea planicaulis, without a description, by Harvey in his Australian exsiccata (1857c: no. 342).