Revision of the Afrotropical species of the hover fly genus Rondani (Diptera, Syrphidae) using morphological and molecular data.

The Afrotropical representatives of the hover fly genus Rondani, 1857 (Diptera) are divided into two subgenera, namely s.s. and Séguy, 1951 and, in this present work, the subgenus Mesembrius s.s. is revised. A total of 23 s.s. species are recognised for the Afrotropics. Known species are re-described and six species new to science are described: , , , , and . (Verrall, 1898) is considered a junior synonym of (Macquart, 1842), Hull, 1941 a junior synonym of (Loew, 1858), (Loew, 1869) a junior synonym of (Macquart, 1842) and Curran, 1929 a junior synonym of Curran, 1929. The females of Curran, 1939, Curran, 1927 and (Hull, 1937) are described for the first time. Lectotypes are designated for , , (Bezzi, 1915), (Bezzi, 1915), , (Bezzi, 1912) and (Bigot, 1883). Separate identification keys for males and females are presented. We obtained 236 DNA barcodes for 18 species. The relationships amongst the different species are briefly discussed, based on morphological and DNA barcode data.