Onoba aculeus, common name the pointed cingula, is a species of small sea snail, a marine gastropod mollusk or micromollusk in the family Rissoidae.

[1] The maximum recorded shell length is 4.2 mm.

[2] Minimum recorded depth is 0 m.[2] Maximum recorded depth is 115 m.[2] This species occurs in European waters and in the North and Northeast Atlantic Ocean.

Distribution: Greenland; Greenland: West Greenland, East Greenland; Canada; Canada: Newfoundland, Gulf of St. Lawrence, Quebec, Nova Scotia, New Brunswick; USA: Maine, Massachusetts, Rhode Island, Connecticut; Eastern Atlantic: Iceland