Crassispira greeleyi is a species of sea snail, a marine gastropod mollusk in the family Pseudomelatomidae.

(Original description) The small, stout, solid shell is acute with eight or nine whorls.

The protoconch is small, smooth, dark reddish purple with two whorls followed by a third with strong arcuate ribs concave anteriorly, and which at the end of the whorl are replaced by transverse nodules separated from the suture behind by a revolving ridge.

The body whorl has twelve or thirteen narrow transverse ribs, extending forward from the anal fasciole.

Behind the fasciole a stout ridge revolves a little in advance of the appressed edge of the whorl.