Eulithidium tessellatum is a species of sea snail, a marine gastropod mollusc in the family Phasianellidae.

The color is sometimes broken into subsutural and peripheral series of flammules, encircled with close continuous narrow revolving obliquely descending, regularly spaced orange or red lines.

This species and the Eulithidium affine (C. B. Adams, 1850) are very abundant in many West Indian localities.

Fresh specimens of both exhibit microscopic revolving impressed striae.

[3] This species is distributed in abundant numbers in the Gulf of Mexico and in the Caribbean Sea and the Lesser Antilles