Stigmaulax sulcatus is a species of predatory sea snail, a marine gastropod mollusc in the family Naticidae, the moon snails.

[1] An uncommon species -Western Atlantic sources The maximum recorded shell length is 38 mm.

[2] Minimum recorded depth is 0 m.[2] Maximum recorded depth is 44 m.[2] Dredged at 150+ metres depth, off Barbados.

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