A new fern-feeding species of Agromyzidae (Diptera) from Taiwan

A new species of Tropicomyia angioptericola Shiao (Diptera: Agromyzidae) was found feeding on Angiopteris lygodiifolia Rosenst. (Marattiaceae) in northern Taiwan; morphological characters of the adults and larvae as well as mining patterns are described and illustrated. Remarks on the morphology, taxonomy, host plants and related issues of fern-feeding agromyzids are provided. Differences in the male genitalia with related species are also proposed for diagnostic discrimination.