Pendroma perplexa is a species of sea snail, a marine gastropod mollusk in the family Pendromidae.

[2] The small, whitish shell grows to a length of 3 mm.

The numerous, sharp plicae on these whorls have an irregular pattern.

This chink is continued by a shallow groove behind the inner lip.

[3] This marine species occurs from St Kitts, West Indies to Argentina