Sphaerococcus platyphyllus Kützing, 1843b: 410 (type locality: "Ostindien'').—Kützing, 1849: 781–782.— Kützing, 1868: 32, pl. 94: figs. a,b.— Martens, 1868: 96–97.
INDIAN OCEAN DISTRIBUTION: uncertain.
Note: Kützing based this species on a specimen seen in the Berlin Herbarium that was collected by Lamare-Picquot. The provenance was given by Kützing variously as "Ostindien'', "in India orientali'', and "in mari indico''. The species was listed by J. Agardh (1851 [1851–1863]: 382; 1876: 332) as a species inquirenda aligned with Rhodymenia.