Allocentrotus Mortensen, 1942 accepted as Strongylocentrotus Brandt, 1835 (original description)
Amblypneustes pallidus subglobosus Mortensen, 1942 (original description)
Amblypneustes pallidus var. subglobosus Mortensen, 1942 accepted as Amblypneustes pallidus subglobosus Mortensen, 1942 (original description)
Asterechinus Mortensen, 1942 (original description)
Asterechinus elegans Mortensen, 1942 (original description)
Echinus atlanticus helenae Mortensen, 1942 (original description)
Echinus atlanticus var. helenae Mortensen, 1942 accepted as Echinus atlanticus helenae Mortensen, 1942 (original description)
Echinus stenoporus Mortensen, 1942 accepted as Gracilechinus stenoporus (Mortensen, 1942) (original description)
Hemicentrotus Mortensen, 1942 (original description)
Lamprechinus sculptus Mortensen, 1942 accepted as Trigonocidaris sculptus (Mortensen, 1942) (original description)
Lamprechinus sculptus hawaiiensis Mortensen, 1942 (original description)
Lamprechinus sculptus var. hawaiiensis Mortensen, 1942 accepted as Lamprechinus sculptus hawaiiensis Mortensen, 1942 (original description)
Microcyphus ceylanicus Mortensen, 1942 (original description)
Microcyphus keiensis Mortensen, 1942 (original description)
Microcyphus maculatus godeffroyi Mortensen, 1942 (original description)
Microcyphus maculatus var. godeffroyi Mortensen, 1942 accepted as Microcyphus maculatus godeffroyi Mortensen, 1942 (original description)
Microcyphus rousseaui purpuratus Mortensen, 1942 (original description)
Microcyphus rousseaui var. purpuratus Mortensen, 1942 accepted as Microcyphus rousseaui purpuratus Mortensen, 1942 (original description)
Nudechinus ambonensis Mortensen, 1942 (original description)
Nudechinus ambonensis purpurascens Mortensen, 1942 (original description)
Nudechinus ambonensis var. purpurascens Mortensen, 1942 accepted as Nudechinus ambonensis purpurascens Mortensen, 1942 (original description)
Nudechinus scotiopremnus australiensis Mortensen, 1942 (original description)
Nudechinus scotiopremnus var. australiensis Mortensen, 1942 accepted as Nudechinus scotiopremnus australiensis Mortensen, 1942 (original description)
Opechinus albus Mortensen, 1942 (original description)
Opechinus albus var. virescens Mortensen, 1942 accepted as Opechinus albus virescens Mortensen, 1942 (original description)
Opechinus albus virescens Mortensen, 1942 (original description)
Printechinus viridis Mortensen, 1942 (original description)
Salmacis belli unicolor Mortensen, 1942 (original description)
Salmacis belli var. unicolor Mortensen, 1942 accepted as Salmacis belli unicolor Mortensen, 1942 (original description)
Salmacis sphaeroides var. variegata Mortensen, 1942 accepted as Salmacis sphaeroides variegata Mortensen, 1942 (original description)
Salmacis sphaeroides variegata Mortensen, 1942 (original description)
Sterechinus neumayeri nigroalba Mortensen, 1942 (original description)
Sterechinus neumayeri var. nigroalba Mortensen, 1942 accepted as Sterechinus neumayeri nigroalba Mortensen, 1942 (original description)
Temnopleurus hardwickii impressus Mortensen, 1942 (original description)
Temnopleurus hardwickii var. impressus Mortensen, 1942 accepted as Temnopleurus hardwickii impressus Mortensen, 1942 (original description)
Temnotrema siamense megaloplax Mortensen, 1942 (original description)
Temnotrema siamense rubicundum Mortensen, 1942 (original description)
Temnotrema siamense var. megaloplax Mortensen, 1942 accepted as Temnotrema siamense megaloplax Mortensen, 1942 (original description)
Temnotrema siamense var. rubicundum Mortensen, 1942 accepted as Temnotrema siamense rubicundum Mortensen, 1942 (original description)
Trigonocidaris indica Mortensen, 1942 (original description)
Trigonocidaris micropora Mortensen, 1942 (original description)
Trigonocidaris radiata Mortensen, 1942 (original description)