Daphnella excavata Hedley, 1907: not Gatliff, 1906 Nepotilla tropicalis is a species of sea snail, a marine gastropod mollusk in the family Raphitomidae.

Each whorl spreads in a broad shelf above, and thence narrows anteriorly.

Sculpture:—On the body whorl there are four, and on the earlier two, spiral cords, the topmost running along the angle of the shell.

The radials which over-ride these are thin elevated lamellae, commencing at the suture and ending as imbricating scales on the snout.

[2] This marine species is endemic to Australia and occurs off Queensland.