The following taxon apparently lies within the circumscription of Gelidium pusillum but has not yet been transferred or reduced to synonymy:
Gelidium pulvinatum (C. Agardh) Grunow forma parvissimum Børgesen, 1935: 42–43, fig. 17 (`parvissima') (type locality: Bandra, Bombay, India).—K. Srinivasan, 1965: 245.— S. Dixit, 1966: 12.— Desikachary, V. Krishnamurthy, & M. Balakrishnan, 1990: 198–199, fig. 41F.
INDIAN OCEAN DISTRIBUTION: India.