This turrid is 5mm and I don't know what genus it's likely to be. You can see the spiral sculpture in profile despite the glare. The shot from the side shows the posterior notch. There aren't exactly axial ribs, more like waves.

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This is probably closely related to Daphnella cyclophora (Deshayes, 1863), depicted in worldwideconchology.com and sized at 12.8mm.