The Neotropical genus Marbenia Malloch is revised and now includes 3 species: Marbenia cinerea, sp. nov., Marbenia pallida, sp. nov. and Marbenia peculiaris Malloch, 1931. The genus is herein recorded from the amazonian region of South America (Bolivia, Brazil and Ecuador), and characters of male and female terminalia are illustrated for the first time.
The Neotropical genus Scutops is revised, including the description of S. flavithorax sp. nov., S. ipixunensis sp. nov., S. melinus sp. nov., S. robustus sp. nov., S. spinophallus sp. nov., and the redescriptions of five species. A key to included species is provided and Scutops striatus Hennig, 1969 is transferred to Periscelis Loew.
The Neotropical genus Neoscutops Malloch is revised and now includes 14 species. The genus is divided into two species groups: the peruvianus Group including N. annulatus sp. nov., N. barcelosiensis sp. nov., N. flavoscutellatus sp. nov., N. luteus sp. nov., N. manaos sp. nov., N. manuensis sp. nov., N. melleus sp. nov., N. nitidus sp. nov., N. peruvianus Hennig, 1969, and N. waorani sp. nov.; and the rotundipennis Group including N. cariri Amorim & Vasconcelos, 1990, N. minor sp. nov., N. ranyseae sp. nov., and N. rotundipennis Malloch, 1926. A phylogenetic analysis was performed to test the monophyly of the Neoscutops species groups proposed in this study. An identification key for the species of Neoscutops is provided.
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