Merrifieldia malacodactylus is a moth of the Pterophoridae family. It is known from Central Asia, Yemen, Mediterranean Europe, Tunisia, Morocco, Anatolia, Syria, Iran, Afghanistan, Iraq, Lebanon, the Palestinian Territories and Russia. Adults are very variable. The larvae feed on Origanum vulgare, Thymus herba-barona, Lavandula stoechas, Lavandula angustifolia, Lavandula latifolia, Calamintha nepeta, Rosmarius officinalis and Nepeta nepetellae.