Sperosoma obscurum Agassiz & Clark 1907

Agassiz & Clark 1907. Preliminary report on the Echini collected, in 1902, among the Hawaiian islands by the U.S. Fish Commission Steamer "Albatross," in charge of Commander Chauncey Thomas, U.S.N., commanding. Bulletin of the Museum of Comparative Zoology at Harvard College, 50(No. 3) 1907: (229-272)