On the identities of Neotropical Stegana species (Diptera, Drosophilidae). II. Stegana acutangula (Hendel) and Stegana triseta (Duda), with descriptions of three new closely related species. Revista Brasileira de Entomologia, 64(4) 2020: 1-33. 24 [Zoological Record Volume 157]