Deltotus Séguy, 1935 Deltotus Séguy, 1935: 99. Type species: Deltotus facetus Séguy, 1935. Diagnosis. Colouration dark-brown to bluish-green or purplish, legs brown to yellow; wing without maculae. Female with proclinate fronto-orbital seta; parafrons weakly setulose on upper half; interfrontal seta absent. Dorsocentrals 2+2. Presutural acrostichals developed; one postsutural pair. Postsutural intra-alars 2; intrapostalar present. Prosternum enlarged anteriorly and widely setulose. Katepisternals 1+3. Meron and katepimeron bare. Anatergite setulose. Postalar wall setulose. Anterior suprasquamal ridge setulose. Wing with R1 setulose dorsally; Rs node and R4+5 setulose dorsally and ventrally; M bent forward towards R4+5. Lower calypter glossiform. Subcostal sclerite densely setulose ventrally. Calcar strong. First abdominal sternite setulose on lateral margins. Comments. Deltotus is one of the three genera with a setulose postalar wall. This character groups the clade (Deltotus + (Pyrellina + Polietina )) (Nihei & de Carvalho 2007a), with the former two genera Afrotropical in distribution and the latter Neotropical. Distribution (3 species). Afrotropical (Madagascar). References. Peris (1967), Zielke (1972), Couri et al. (2006).

Published as part of Nihei, Silvio Shigueo & Carvalho, Claudio José Barros De, 2009, The Muscini flies of the world (Diptera, Muscidae): identification key and generic diagnoses, pp. 1-24 in Zootaxa 1976 on page 12, DOI: 10.5281/zenodo.185153