The year of description has long been given as 1877, but it is actually 1866. Possibly, this traces back to an error by Döderlein (1930), who had the correct ref, but wrong year. Later this was just copied by others.
Döderlein. (1930). Die Ophiuroiden der Deutschen Tiefsee-Expedition. 2. Euryale. Wissenschaftliche Ergebnisse der Deutschen Tiefsee-Expedition auf dem Dampfer "Valdivia" 1898-1899. 22(6): 348-396, 3 pls.