Caulerpa sedoides C. Agardh var. crassicaulis J. Agardh, 1873: 40 (lectotype locality: Tonga fide Weber-van Bosse, 1898: 388).
Caulerpa sedoides C. Agardh forma crassicaulis (J. Agardh) Weber-van Bosse, 1898: 387–388, pl. XXXIV: fig. 11.—Svedelius, 1906a: 139–140, figs. 47, 48.— Duraiswamy, 1989: figs. 2b, 11r, table 2.— Duraiswamy, 1990b: 41, figs. 4A–J, 10A.— Kalimuthu, Kaliaperumal, & Ramalingam, 1992: 121.
INDIAN OCEAN DISTRIBUTION: Sri Lanka.