Thysanocladia costata Harvey, 1855b: 550 (type locality: Rottnest Island, Western Australia).—Harvey, 1863: xxxiii.— J. Agardh, 1876: 286.— Sonder, 1880: 16.— De Toni, 1897: 380.— Lucas, 1909: 28.— Kylin, 1932: 14, pl. 4: fig. 8.— V. May, 1965: 388.
Callophycus costatus (Harvey) P. Silva, 1957b: 143.—Min-Thein & Womersley, 1976: 19–23, figs. 5, 6, 51A.— Huisman & Walker, 1990: 401.
INDIAN OCEAN DISTRIBUTION: Australia.