Two new species of Medeventor Wheeler from South America (Diptera, Chloropidae, Oscinellinae) Author Bazyar, Zeinab Author Silva, Vera Cristina text Zootaxa 2018 2018-04-12 4407 4 563 572 journal article 30263 10.11646/zootaxa.4407.4.8 e93836ab-fc18-4d62-9531-9bf44c472883 1175-5326 1221136 16341855-5A50-4CAA-928E-2A7A46848B1D Key to the species of Medeventor Wheeler 1. First flagellomere rounded; facial carina broad; palpus swollen; eyes bare; hypandrium open posteriorly; epandrial setulae distributed mostly laterally; tip of surstylus pointed, in posterior view; cerci without long setae.......... M. nubosus Wheeler 1’. First flagellomere with an acute upper corner; facial carina narrow; palpus elongate; eyes hairy; hypandrium closed posteriorly; epandrial setulae uniformly spread; tip of surstylus pointed or rounded, in posterior view; cerci with a pair of long setae..................................................................................................... 2 2. Last two or three hind tarsomeres dark; sternite 6 well developed, bent up towards the tip of the terminalia, near to the distiphallus; tip of gonites flattened; epandrium with many setulae; surstylus pointed, in posterior view; cerci pointed, separated, each with a long seta on it that bent upward; 3.8 mm long..................................... M. tschirnhausi , sp. n. 2’. All tarsomeres yellow; sternite 6 weakly developed; apex of gonites rounded; epandrium with very few setulae; surstylus rounded, in posterior view; cerci rounded, fused basally, each with a long seta on them that bent downward; 2 mm long........................................................................................... M. minimus , sp. n.