Narrowly oligolectic on Spergularia (Caryophyllaceae). Wood & Cross (2017) state: The pollen loads of three females (two from Cacela Velha and one from Pêra) contained pure Spergularia-type (Caryophyllaceae) pollen. Field observations at Cacela Velha recorded only Spergularia purpurea as a pollen host, and observations at Pêra recorded only Spergularia marina as a pollen host, with the females apparently ignoring Spergularia media.