Benthomangelia bandella is a species of sea snail, a marine gastropod mollusk in the family Mangeliidae.

(Original description) The thin, white, polished shell has a fusiform shape and contains 8 whorls; The protoconch is smooth.

Of other transverse sculpture, there are only the lines of growth which are prominent only where they cross the band marking the track of the notch.

The revolving sculpture consists of a rather stout rib closely appressed to the suture forming one margin of the band, the other edge of which forms a carina, in advance of which are (on the body whorl 20–23) flattened riblets with about equal interspaces which extend with regularity to the anterior end of the siphonal canal.

[2] B. bandella can be found in Atlantic waters, ranging from the Gulf of Maine, the eastern coast of Florida south to the Lesser Antilles.