Cidaris cidaris meridionalis Mortensen, 1928 (original description)
Cidaris cidaris var. meridionalis Mortensen, 1928 accepted as Cidaris cidaris meridionalis Mortensen, 1928 (original description)
Eucidaris clavata Mortensen, 1928 accepted as Eucidaris tribuloides (Lamarck, 1816) (original description)
Goniocidaris (Aspidocidaris) alba Mortensen, 1928 (original description)
Goniocidaris (Aspidocidaris) australiae Mortensen, 1928 (original description)
Goniocidaris (Aspidocidaris) crassa Mortensen, 1928 (original description)
Goniocidaris (Aspidocidaris) sibogae Mortensen, 1928 (original description)
Goniocidaris (Petalocidaris) spinosa Mortensen, 1928 (original description)
Histocidaris australiae Mortensen, 1928 (original description)
Histocidaris carinata Mortensen, 1928 (original description)
Histocidaris crassispina Mortensen, 1928 (original description)
Histocidaris formosa Mortensen, 1928 (original description)
Histocidaris recurvata Mortensen, 1928 (original description)
Phyllacanthus irregularis Mortensen, 1928 (original description)
Prionocidaris bispinosa nigrobrunnea Mortensen, 1928 (original description)
Prionocidaris bispinosa var. nigrobrunnea Mortensen, 1928 accepted as Prionocidaris bispinosa nigrobrunnea Mortensen, 1928 (original description)
Rhopalocidaris rosea Mortensen, 1928 (original description)
Rhopalocidaris rosea tenuis Mortensen, 1928 (original description)
Stereocidaris grandis hyatorina Mortensen, 1928 (original description)
Stereocidaris grandis var. hyatorina Mortensen, 1928 accepted as Stereocidaris grandis hyatorina Mortensen, 1928 (original description)
Stereocidaris granularis Mortensen, 1928 (original description)
Stereocidaris hawaiiensis Mortensen, 1928 (original description)
Stereocidaris indica philippinensis Mortensen, 1928 (original description)
Stereocidaris indica var. philippinensis Mortensen, 1928 accepted as Stereocidaris indica philippinensis Mortensen, 1928 (original description)
Stereocidaris purpurascens Mortensen, 1928 (original description)
Stereocidaris sceptriferoides lanceolata Mortensen, 1928 (original description)
Stereocidaris sceptriferoides var. lanceolata Mortensen, 1928 accepted as Stereocidaris sceptriferoides lanceolata Mortensen, 1928 (original description)
Stereocidaris squamosa Mortensen, 1928 (original description)
Stereocidaris stylifera Mortensen, 1928 (original description)
Stereocidaris sulcatispinis Mortensen, 1928 (original description)
Stereocidaris tubifera Mortensen, 1928 (original description)
Stereocidaris tubifera impressa Mortensen, 1928 (original description)
Stereocidaris tubifera var. impressa Mortensen, 1928 accepted as Stereocidaris tubifera impressa Mortensen, 1928 (original description)
Stylocidaris amboinae Mortensen, 1928 (original description)
Stylocidaris fusispina Mortensen, 1928 accepted as Chorocidaris fusispina (Mortensen, 1928) (original description)
Stylocidaris longicollis Mortensen, 1928 accepted as Prionocidaris baculosa longicollis Mortensen, 1928 (original description)
Stylocidaris maculosa Mortensen, 1928 (original description)
Stylocidaris rufa Mortensen, 1928 (original description)