Eucithara marginelloides is a small sea snail, a marine gastropod mollusk in the family Mangeliidae.
The length of the shell attains 15 mm.
The interstices of the longitudinal ribs are either smooth or more or less thickly covered with fine revolving striae. The color of the shell is yellowish or ashwhite, with fine, rather close chestnut revolving lines, sometimesinterrupted by the ribs, sometimes crossing them, sometimes obsolete. The shoulder is usually tinged with chocolate.
This marine species occurs off the Philippines, New Guinea and New Caledonia.
