Phyllonorycter caudasimplex is a moth from the Gracillariidae family. It is known from Nigeria.[1]
The length of the forewings is 3.2 mm.[2]
The larvae were recorded on Dombeya acutangula and Ruizia cordata, but these records are based on a misidentification of Phyllonorycter ruizivorus. They probably mine the leaves of their host plant.