Abstract
The family Anthomyiidae (Diptera) has received very little attention in Portugal and as a consequence the state of knowledge of this group of flies in the country is very insufficient. Until now, only 20 species were known for mainland Portugal, but non-systematic sampling carried out over more than 10 years allowed the discovery of 52 new species for the country, 12 of which are also new to the fauna of the Iberian Peninsula, and three additional species new to mainland Portugal (that had already been reported to the archipelagos of the Azores and Madeira). An updated checklist of the species that are currently known in mainland Portugal is also provided.