Mortensen 1948. Report on the Echinoidea collected by the United States Fisheries Steamer "Albatross" during the Philippine Expedition, 1907-1910. Part 3 : the Eohinoneidae, Echinolampadidae,Clypeastridae, Arachnoididae, Laganidae, Fibularidae, Urechinidae, Ec Bulletin United States National Museum No 100, 14 1948: pp. 89-140