- Hemiaster expergitus Lovén, 1871 accepted as Holanthus expergitus (Lovén, 1871)
- Hemiaster gibbosus A. Agassiz, 1879 accepted as Holanthus expergitus gibbosus (A. Agassiz, 1879)
- Hemiaster mentzii A. Agassiz, 1883 accepted as Holanthus expergitus (Lovén, 1871)
- Hemiaster zonatus A. Agassiz, 1879 accepted as Holanthus expergitus (Lovén, 1871)
- Holanthus expergitus (Lovén, 1871)
- Holanthus expergitus gibbosus (A. Agassiz, 1879)