On the identities of Neotropical Stegana species (Diptera, Drosophilidae). I. Redescription of Stegana magnifica Hendel, 1913 and Stegana fumipennis (Enderlein, 1922)

ABSTRACT

Abstract Two conspicuous Steganinae species, Stegana (Steganina) magnifica Hendel, 1913 from Amazonian Peru and Stegana (Ceratostylus) fumipennis (Enderlein, 1922) from southern Brazil, are redescribed based on holotypes, and their identities are clarified. Both species are exclusive to the Neotropical Region and the first, with a body length of about 5.5 mm, is the largest species of Stegana described so far in this region, while the latter displays a peculiar antenna bearing an unusual, forward-projected, comma-shaped flagellomere 1. The photomicrographs of the habitus and terminalia of each specimen are also provided.