Phyllonorycter encaeria is a moth of the Gracillariidae family. It is known from South Africa, where it has been recorded from Pretoria and the suburbs of Cape Town. The length of the forewings is 2.3–2.5 mm. The forewings are elongate and the ground colour is ochreous with white markings consisting of very short basal streak, two fascia, two costal strigulae and one dorsal strigula. The hindwings are pale grey with a fringe of the same colour. Adults are on wing from early January to late February and again from late September to mid-November.