Aporometra H.L. Clark, 1938 (original description)
Gymnanthenea H.L. Clark, 1938 (original description)
Hesperaster H. L. Clark, 1938 † accepted as Ammotrophus H.L. Clark, 1928 (original description)
Leptopentacta Clark, 1938 (original description)
Lipotrapeza Clark, 1938 (original description)
Lissophiothrix H.L. Clark, 1938 (original description)
Macrophiothrix H.L. Clark, 1938 (original description)
Manasterina H.L. Clark, 1938 (original description)
Monilimetra H.L. Clark, 1938 accepted as Toxometra A.H. Clark, 1911 (original description)
Ophiodyscrita H.L. Clark, 1938 (original description)
Ophioteichus H.L. Clark, 1938 (original description)
Ophiothauma H.L. Clark, 1938 (original description)
Pentathyone Clark, 1938 accepted as Havelockia Pearson in Herdman, 1903 (original description)
Placophiothrix H.L. Clark, 1938 accepted as Macrophiothrix H.L. Clark, 1938 (original description)
Staurothyone Clark, 1938 (original description)
Styphlaster H.L. Clark, 1938 (original description)