Notes on the taxonomy of species of Sciomyzini with a predominantly setulose anepisternum (Diptera, Sciomyzidae)

The present paper was conceived originally as a straightforward, simple description of a new African taxon. It grew substantially as more research was conducted. It now consists of four parts. In Part I, we discuss the taxonomy of five species of Sciomyzini with a predominantly setulose anepisternum: Atrichomelina pubera, Ditaeniella grisescens, D. trivittata, Pherbellia pilosa, and Ph. shatalkini. In Parts II and III, we consider the three taxa initially included in the genus Ditaeniella sensu Rozkošný (1987) (D. grisescens, D. parallela, and D. patagonensis) and the taxon described herein, D. milleri sp. nov., analysing this group by use of both the classical morphological approach (Part II) as well as by analysis of molecular data from available DNA barcodes (Part III). In Part IV, we provide a key to the taxa of Sciomyzini worldwide that have a predominantly setulose anepisternum. We also provide a list of specimens examined, the data from which significantly supplement the information previously available regarding the distribution of several Palaearctic species.