Nilotanypus Kieffer, 1923

Shimabukuro, Erika Mayumi, Dantas, Galileu P. S. & Lamas, Carlos José Einicker, 2021, A new madicolous species of Nilotanypus Kieffer (Diptera: Chironomidae) from Amazon region, northwestern Brazil, Zootaxa 4948 (3), pp. 431-438 : 437

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.