Gyriscus asteleformis is a species of sea snail, a marine gastropod mollusk in the family Architectonicidae, known as the staircase shells or sundials.
This species is endemic to New Zealand, found between the northern tip of the North Island and the Three Kings Islands.
This species is found at depths of about 90 m. The shell height is up to 8 mm, and the width is up to 7.5 mm.
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