Apatopygus occidentalis H.L. Clark, 1938 (original description)
Arachnoides tenuis H.L. Clark, 1938 (original description)
Asthenosoma intermedium H.L. Clark, 1938 (original description)
Echinocyamus planissimus H.L. Clark, 1938 (original description)
Eupatagus dyscritus H.L. Clark, 1938 accepted as Granobrissoides dyscritus (H.L. Clark, 1938) (original description)
Heliocidaris erythrogramma parvispina H.L. Clark, 1938 accepted as Heliocidaris erythrogramma (Valenciennes, 1846) (original description)
Heliocidaris erythrogramma var. parvispina H.L. Clark, 1938 accepted as Heliocidaris erythrogramma parvispina H.L. Clark, 1938 accepted as Heliocidaris erythrogramma (Valenciennes, 1846) (original description)
Hesperaster H.L. Clark, 1938 † accepted as Ammotrophus H.L. Clark, 1928 (original description)
Hesperaster arachnoides H.L. Clark, 1938 accepted as Ammotrophus arachnoides (H.L. Clark, 1938) (original description)
Hesperaster crassus H.L. Clark, 1938 † accepted as Ammotrophus crassus (H.L. Clark, 1938) † (original description)
Hypselaster dolosus H.L. Clark, 1938 accepted as Proraster jukesii (Gray, 1851) (original description)
Prionocidaris bispinosa laevis H.L. Clark, 1938 (original description)
Prionocidaris bispinosa var. laevis H.L. Clark, 1938 accepted as Prionocidaris bispinosa laevis H.L. Clark, 1938 (original description)
Pseudechinus hesperus H.L. Clark, 1938 (original description)
Rhynobrissus macropetalus H.L. Clark, 1938 (original description)
Temnopleurus michaelseni var. viridis H.L. Clark, 1938 accepted as Temnopleurus michaelseni viridis H.L. Clark, 1938 accepted as Temnopleurus michaelseni (Döderlein, 1914) (original description)
Temnopleurus michaelseni viridis H.L. Clark, 1938 accepted as Temnopleurus michaelseni (Döderlein, 1914) (original description)
Temnotrema notium H.L. Clark, 1938 accepted as Temnopleurus michaelseni (Döderlein, 1914) (original description)

 Fossil range

 for Hesperaster crassus H.L. Clark, 1938 †

Quarternary [details]

 Type locality

 for Hesperaster crassus H.L. Clark, 1938 †

near salt lake on Rottnest Island, Western Australia, Australia [details]

 Type material

 for Hesperaster crassus H.L. Clark, 1938 †

Holotype: WAM 115-37 WAM = Western Australian Museum [details]