Cricotopus

Drayson, Nick, Cranston, Peter S. & Krosch, Matt N., 2015, Taxonomic review of the chironomid genus Cricotopus v. d. Wulp (Diptera: Chironomidae) from Australia: keys to males, females, pupae and larvae, description of ten new species and comments on Paratrichocladius Santos Abreu, Zootaxa 3919 (1), pp. 1-40 : 22

Key to adult males of Australian Cricotopus

(excluding C. howensis , C. wangi , inadequately known as adult male)

1 Tergite IV wholly pale ( Fig. 1 B,F,H,I)..................................................................... 2

- Tergite IV wholly ( Fig. 1 A,E,G) or partly ( Fig. 1 C,D) dark..................................................... 5

2 Tibiae and tarsomeres of mid- and hind legs pale ( Fig. 1 B,H)................................................... 3

- Tibiae of all legs dark, with or without pale bands; all tarsomeres dark ( Fig. 1 F,I)................................... 4

3 All legs pale apart from small dark patch proximal on tibia ( Fig. 1 H)............................... C. tasmania sp. n.

- All femora pigmented, tarsomeres of fore-leg darkened ( Fig. 1 B)........................ C. albitarsis Hergstrom sp. n.

4 Tergite IV with median and lateral setae separate ( Fig. 3 F)...................................... C. varicornis sp. n.

- Tergite IV with median and lateral setae connected by posterior setae ( Fig. 3 G)........................ C. hillmani sp. n.

5 Tergite I dark ( Fig. 1 A,E,G)............................................................................. 6

- Tergite I pale ( Fig. 1 C,D)............................................................................... 8

6 All tibiae with pale bands ( Fig. 1 G)............................................. C. parbicinctus Hergstrom sp. n.

- All tibiae uniformly dark ( Fig. 1 A,E)...................................................................... 7

7 Inferior volsella bilobed ( Fig. 2 A)........................................................... C. acornis sp. n.

- Inferior volsella unilobed ( Fig. 1 E)......................................................... C. conicornis sp. n.

8 Tergites II, IV, V & VI dark with pale anterior band ( Fig. 1 C), inferior volsella bilobed or rounded ( Fig. 2 C)............................................................................................... C. annuliventris (Skuse)

- Tergite II mid brown with pale posterior band, tergites III & IV dark with pale anterior and posterior pale bands ( Fig. 1 D), infe- rior volsella elongate, pointing posteriorly ( Fig. 2 D).......................................... C. brevicornis sp. n.

Figures

FIGURE 1. Cricotopus adult males. Columns (left to right): legs, anterior to posterior; thorax; dorsal abdomen. A. C. acornis, B. C. albitarsis, C. C. annuliventris, D. C. brevicornis, E. C. conicornis, F. C. hillmani, G. C. parbicinctus, H. C. tasmania, I. C. varicornis.

FIGURE 2. Cricotopus male genitalia, part, (inset variations in inferior volsella above, gonostylus below). A. C. acornis, B. C. albitarsis, C. C. annuliventris, D. C. brevicornis, E. C. conicornis, F. C. hillmani.

FIGURE 3. Cricotopus male genitalia, part. A. C. howensis, B. C. parbicinctus (inset variation in inferior volsella above, gonostylus below), C. C. tasmania, D. C. varicornis, E. C. wangi. Tergite III, IV setation: F. C. varicornis, G. C. hillmani.