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Macrostomus Wiedemann is recorded for the first time in the Cerrado Biome and also from the state of Maranhão, Brazil. The following species are treated here: Macrostomus maranhensis sp. nov. and Macrostomus paraiba Rafael & Cumming (M. amazonensis species-group); Macrostomus ferrugineus (Fabricius) and Macrostomus gurupi sp. nov. (M. ferrugineus species-group), Macrostomus cummingi sp. nov. (M. pictipennis species-group) and Macrostomus paraensis sp. nov. (unplaced species-group). A map showing the distribution of these species is presented.
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SENA et al. (2024) studied this question.
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