Kurtziella serga is a species of sea snail, a marine gastropod mollusk in the family Mangeliidae.

These also cover the notch-band, and over them, as well as the primaries, the lines of growth are raised in microscopic granules, or lamella, which, under strong magnification, give a very peculiar scabrous appearance to the surface.

The strongest primary riblet is the one just in advance of the somewhat steeply declining and poorly defined notchband.

The outer lip is thin, produced and probably thickened in the perfectly mature adult.

[2] K. serga can be found in Atlantic waters, in the Gulf Stream ranging from Bermuda to Brazil.