Turris normandavidsoniTurris normandavidsoni is a species of sea snail, a marine gastropod mollusk in the family Turridae commonly called the turrids.NameThe discoverer of this species, Baldomero Olivera, named it after a professor of his, Caltech biologist Norman Davidson.DescriptionThe length of the shell attains 71 mm.DistributionThis species is native to waters of the Philippines.; also off Papua New Guinea.