Scytonema arenarium Berkeley, 1839: 327, pl. VII: fig. 3 (type locality: Tasmania).
Schizothrix arenaria (Berkeley) Gomont, 1892a: 312.—Drouet, 1968: 109–124, figs. 28–34.— Rhyne, 1971: 48.— Hackett, 1977: 12.— Whitton & Potts, 1979b: 6.— Whitton & Potts, 1982: 520.— Teo & Wee, 1983: 17, fig. 5.— Lambert, Steinke, & Naidoo, 1989: 487, fig. 23, tables 2, 3.— Phang & Wee, 1991: 56.— Basson, 1992: 223.
INDIAN OCEAN DISTRIBUTION: Aldabra Islands, Australia, Burma, Diego Garcia Atoll, Indonesia (Flores), Kuwait, Maldives, Saudi Arabia, Singapore, South Africa.
Note: Among numerous taxonomic synonyms cited by Drouet (1968) are seven that are listed separately in this catalogue. (See the appended Reconciliation with Drouetian Classification [p. 79].)