Macrophiothrix H.L. Clark, 1938 (taxonomy source)
Macrophiothrix albolineata (H.L. Clark, 1938) (new combination reference)
Macrophiothrix aristulata (Lyman, 1879) accepted as Ophiothrix aristulata Lyman, 1879 represented as Ophiothrix (Ophiothrix) aristulata Lyman, 1879 (new combination reference)
Macrophiothrix hybrida (H.L. Clark, 1915) (new combination reference)
Macrophiothrix longimana (Djakonov, 1930) accepted as Macrophiothrix coerulea (Djakonov, 1930) (source of synonymy)
Macrophiothrix megapoma H.L. Clark, 1938 (source of synonymy)
Macrophiothrix unicolor Liao, 1978 accepted as Macrophiothrix coerulea (Djakonov, 1930) (source of synonymy)
Ophiothrix (Keystonea) A.M. Clark, 1967 accepted as Macrophiothrix H.L. Clark, 1938 (source of synonymy)
Ophiothrix longimana Djakonov, 1930 accepted as Macrophiothrix coerulea (Djakonov, 1930) (source of synonymy)
Placophiothrix H.L. Clark, 1938 accepted as Macrophiothrix H.L. Clark, 1938 (source of synonymy)

 Nomenclature

 for Macrophiothrix aristulata (Lyman, 1879)

This name combination is probably taxonomically correct, but the work it was proposed in is not nomenclaturally valid. [details]

 Synonymy

 for Placophiothrix H.L. Clark, 1938

Placophiothrix forms a monophyletic clade with Macrophiothrix acc. to Hoggett (1990) and O'Hara et al. (2017, suppl.). [details]