Glyptaesopus phylira is a species of sea snail, a marine gastropod mollusk in the family Borsoniidae.

(Original description) The small, slender shell is thin, waxen white, with a narrow purple brown band in front of the suture in the later whorls.

The spiral sculpture of (on the early whorls one, later two, and on the body whorl three) strong, rather widely separated threads which are prominently nodulous where they cross the ribs and on the spire are feeble in the interspaces; suture appressed, obscure, the anal fasciole inconspicuous behind the first row of nodules; on the base are 3 or 4 distant threads and on the siphonal canal a few feeble spirals.

The axial sculpture (on the body whorl of about 15) consists of narrow sharp nearly vertical ribs with wider interspaces.

[2] This marine species occurs in the Pacific Ocean from Panama to Ecuador.