Gymnobela emertoni is a species of sea snail, a marine gastropod mollusk in the family Raphitomidae.

About three whorls below the protoconch are covered with prominent, longitudinal ribs, which form a well marked shoulder and are crossed by several conspicuous, revolving cinguli and grooves, which render them decidedly nodulous.

The body whorl is large and swollen, covered throughout with very evident lines of growth, which are crossed, except on the subsutural band, by conspicuous, revolving cinguli, which are separated by spaces considerably exceeding their own breadth.

The aperture is oblong-ovate, scarcely narrowed at the broad, short, open siphonal canal, and with a very wide and rather deep posterior sinus.

The outer lip is thin and projects well forward beyond the sinus in a broadly rounded curve.