Eulithidium rubrilineatum, common name the red line pheasant, is an extremely small species of sea snail with a calcareous opercula, a marine gastropod mollusk in the family Phasianellidae, the pheasant snails.

[1][2] This very small shell grows to a height of 1.6 mm.

The shell shows about a dozen red, oblique spiral lines.

The shoulders of the whorls are red with large white spots.

[3] This species occurs in the Pacific Ocean off California.