Nacospatangus depressus Clark 1917

Clark 1917. Hawaiian and other Pacific Echini. No. 2. The Echinoneidae, Nucleolitidae, Urechinidae, Echinocorythidae, Calymnidae, Pourtalesiidae, Palaestomatidae, Aeropsidae, Palaeopneustidae, Hemiasteridae and Spatangidae. Memoirs of the Museum of Comparative Zoology at Harvard College Cambridge 46 1917: (81-283). 150 CALIFO [Zoological Record Volume 54]