Schwartziella paradoxa is a species of minute sea snail, a marine gastropod mollusk or micromollusk in the family Zebinidae.
The height of the shell attains 2.7 mm. Schwartziella paradoxa n. sp. differs from any other species of Cape Verde Schwartziella by having prominent axial ribs on first whorls of teleoconch, which are absent on last whorl. S. sculptu rata n. sp., which also has weak axial ribs on the first 2-3 whorls, is less elongate, has more evident spiral sculpture and a different protoconch microsculpture.
This species occurs in the Atlantic Ocean off the Cape Verdes.