Nostoc quoyi C. Agardh, 1824: 22 (`quoji') (type locality: Mariana Islands).
Brachytrichia quoyi (C. Agardh) Bornet & Flahault, 1886b [1886–1888]: 373 (including Indian Ocean record).—Jadin, 1894: CLXXI.— Forti, 1907: 680.— Schröder, 1912: 294.— Desikachary, 1959: 580, pls. 124, 125.— Umamaheswara Rao, 1969d: 48.— Umamaheswara Rao, 1974a: 300.— Drouet, 1981: 102–108, figs. 15–17.— G. Subramanian et al., 1989: 317.— Thajuddin & G. Subramanian, 1992a: table III.— Phang, 1994b: 125.
INDIAN OCEAN DISTRIBUTION: India, Malaysia, Maldives, Mauritius, Singapore, Sri Lanka.
Note: Among several taxonomic synonyms cited by Drouet (1981) is Brachytrichia balani (Thuret) Bornet & Flahault, which is listed separately in this catalogue as B. lloydii (P. Crouan & H. Crouan) P. Silva.