A new madicolous species of Nilotanypus Kieffer (Diptera: Chironomidae) from Amazon region, northwestern Brazil Author Shimabukuro, Erika Mayumi Author Dantas, Galileu P. S. 0000-0002-9155-533X Instituto Nacional de Pesquisas da Amazônia, Coordenação de Biodiversidade (CoBio), Divisão de Curso em Entomologia (DiEnt), Av. André Araújo, 2936, 69067 - 375, Manaus, Amazonas, Brazil. https: // orcid. org / 0000 - 0002 - 9155 - 533 X Author Lamas, Carlos José Einicker text Zootaxa 2021 2021-03-22 4948 3 431 438 journal article 7608 10.11646/zootaxa.4948.3.7 9b153288-07a7-4d4d-afee-b554e7956098 1175-5326 4637789 2A998160-4566-4976-9490-6FE5B49EB98B Key to identify males of Nilotanypus Kieffer species (modified from Cheng & Wang 2006 ) 1a. Pseudospurs present on mid tarsi......................................................................... 2 1b. Pseudospurs absent on mid tarsi.......................................................................... 4 2a. Pseudospurs present on fore ta 1 –ta 2; gonostylus with an inner lamella ( Roback 1986 , fig. 8) (Nearctic)..................................................................................................... N. fimbriatus (Walker) 2b. Pseudospurs apparently absent on fore tarsi; gonostylus without lamella.......................................... 3 3a. Total length about 0.80 mm ; abdominal tergites I–V light brown, tergites VI–IX and hypopygium brown; tergite IX with slightly concave posterior margin (Neotropical)...................................... N. pusillus Andersen & Pinho 3b. Total length 1.97–2.20 mm ; abdomen uniformly pale brown to colorless; tergite IX with markedly concave posterior margin (Neotropical)................................................................... N. urubici Andersen & Pinho 4a. Wing with marks..................................................................................... 5 4b. Wing without marks................................................................................... 6 5a. Wing with single mark in basal half (Australian).............................................. N. parvus (Freeman) 5b. Wing with two transverse marks in basal one-fourth (Palaearctic).............................. N. minutus (Tokunaga) 6a. Anal point quadrate ( Oriental )..................................................... N. quadratus Cheng & Wang 6b. Anal point conical..................................................................................... 7 7a. Macrotrichia restricted to apex of wing (Afrotropical)...................................... N. remotissimus Kieffer 7b. Whole wing covered with macrotrichia.................................................................... 8 8a. Abdomen distinctly colored, TI–TV yellow and TVI–TVIII brown...................... N. polycanthus Cheng & Wang 8b. Abdomen unicolored.................................................................................. 9 9a. Abdomen dark, brown to black, tergite IX with straight posterior margin........................................ 10 9b. Abdomen pale, tergite IX with concave posterior margin..................................................... 11 10a. Legs with dark setae; megaseta large,>13 μm long ( Lehmann 1979 , fig. 22, p. 109) (Afrotropical).... N. comatus (Freeman) 10b. Legs without dark setae; megaseta small, about 6 μm long ( Fittkau 1962 , fig. 376, p. 413) (Palaearctic).. N. dubius (Meigen) 11a. AR: 0.5–0.6; gonostylus with a slight inner lamella ( Roback 1986 , fig. 11); tergite IX with 6–8 setae (Nearctic).............................................................................................. N. kansensis Roback 11b. AR: 0.3; gonostylus without inner lamella; tergite IX with 2 setae (Neotropical)..................... N. yanomami sp. n.