Psilaxis radiatus is a species of sea snail, a marine gastropod mollusc in the family Architectonicidae, which are known as the staircase shells or sundials.

[2] Psilaxis radiatus has a shell that reaches 26 mm.

[3] This species can be found in the Indo-Pacific, from the Red Sea and South Africa via Japan, Indonesia, the Philippines and eastern Australia to Hawaii.

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