Phymorhynchus sulciferus is a species of sea snail, a marine gastropod mollusk in the family Raphitomidae.

The outer lip is thin, curving very gently to join the columella with but a very slight bending in anteriorly, not forming a well-defined siphonal canal.

The subsutural band is rather broad, oblique, crossed by delicate slightly curved riblets, most distinct on the upper whorls.

These are cut just above the middle by a broad, shallow groove, making them appear, especially on the body whorl, as two rows of nodules.

On the body whorl, below the transverse ribs, there are from twenty-five to thirty shallow grooves, varying in width, and having between them flattened bauds or threads.