Cricotopus

Tachibana, Satoru, 2022, A new species, Cricotopus cataractaenostocicola, living in a cyanobacterial colony on vertical rocky substrates with trickling water film in Japan (Diptera: Chironomidae), Zootaxa 5178 (3), pp. 241-255 : 249-250

Key to adult males of Cricotopus species near C. (N.) cataractaenostocicola

1 Gonostylus not folded into the inner groove of gonocoxite........................................ Pseudocricotopus

- Gonostylus folded into the inner groove of gonocoxite, usually in most Orthocladinae ............................... 2

2 Pulvilli absent........................................................................................ 3

- Pulvilli present............................................................................... Isocladius

3 Gonocoxite with inner lobe............................................................................. 4

- Gonocoxite without inner lobe............................................................... metatibialis etc.

4 Inner lobe of the gonocoxite single....................................................................... 5

- Inner lobe of the gonocoxite double......................................................... osaruquartus etc.

5 Abdominal tergites almost entirely dark................................................................... 6

- Some abdominal tergites distinctly pale........................................... bifascius or polyannulatus etc.

6 Legs segments almost dark............................................................................. 7

- Tibiae with a long pale ring in the proximal half.................................................. togacutus etc.

7 Anal lobe of wing not strongly inwards.................................................................... 8

- Anal lobe of wing strongly produced inwards...................................................... togaspadix

8 Ninth tergite with a pair of lobes in the middle of posterior margin, bearing strong setae..................... yatabensis

- Ninth tergite with some 10 setae in the middle but without lobes and without setae on posterior margin................. 9

9 Color pale, with body bright yellow, the three mesonotal vittae reddish brown.................... C. (N.) fuscatus Wirth

- Color brown or black................................................................................. 10

10 Setae on abdominal tergites III and IV evenly distributed..................................................... 11

- Setae on abdominal tergites III and IV separated into the median and the lateral groups...................................................................................... C. (N.) lygropis Edwards and C. (N.) nostocicola Wirth

11 Anal point absent and without long hairs on the outside of gonocoxite................................ C. tamapullus - Anal point present and with long hairs on the outside of gonocoxite............................................ 12

12 With middle length hairs near the apex of the inner lobe in the gonocoxite................... C. (N.) shofukuprimus Sasa

- Absence of hairs near the apex of the inner lobe in the gonocoxite................. C. (N.) cataractaenostocicola sp. nov.