The following taxon apparently lies within the circumscription of Hymenocladia chondricola but has not yet been transferred or reduced to synonymy:
Halymenia chondricola Sonder var. elongata Sonder, 1845: 57 (type locality: Western Australia).
INDIAN OCEAN DISTRIBUTION: Australia.
Note: J. Lewis (1994: 6), who was unable to find a type specimen for var. elongata, noted that Sonder, because he did not mention this name in 1848, may have decided that the variety was not worthy of recognition.