World Register of Marine Species (WoRMS)
Mah, C.L. (2026). World Asteroidea Database. Henricia spiculifera (H.L. Clark, 1901). Accessed through: World Register of Marine Species at: https://www.marinespecies.org/aphia.php?p=taxdetails&id=381576 on 2026-08-29
Clark, H. L. (1901). No. 15. Echinoderms from Puget Sound: Observations made on the echinoderms collected by the parties from Columbia University, in Puget Sound in 1896 and 1897. Proceedings of the Boston Society of Natural HIstory. 29(15): 323-337, 4 plates.