Ceramium puberulum Sonder, 1845: 52 (type locality: Western Australia).—Sonder, 1848 [1846–1848]: 167.— Harvey, 1855b: 557.— Harvey, 1863: xlviii.— J. Agardh, 1876: 102.— Sonder, 1880: 12.— J. Agardh, 1894b: 17.— De Toni, 1903: 1452–1453.— Lucas, 1909: 53.— Lucas & Perrin, 1947: 367.— Womersley, 1978: 216–217, figs. 1E,F, 6.— Kendrick, Walker, & McComb, 1988: 204, table 1.— Huisman et al., 1990: 96.— Huisman & Walker, 1990: 422.— Kendrick, Huisman, & Walker, 1990: 51.
Ceramium monile J. Hooker & Harvey var. crassius J. Agardh, 1851 [1851–1863]: 132 (`crassior').
Ceramium puberulum Sonder var. crassius (J. Agardh) J. Agardh, 1876: 102 (`crassior').
INDIAN OCEAN DISTRIBUTION: Australia.
Note: J. Agardh (1851 [1851–1863]: 132) merged Ceramium monile J. Hooker & Harvey (1847: 410; type locality: Tasmania) with C. puberulum, but erroneously retained the younger name. He recognized C. puberulum as a variety of C. monile, using a new varietal epithet (crassius) rather than retaining puberulum, an option permitted by the ICBN. Later (1876: 102), he restored the earlier name for the combined species, treating C. monile as a variety of C. puberulum. The nomenclaturally typical form was then named C. puberulum var. crassius, an incorrect name for the autonym, var. puberulum.