Paracricotopus Brundin, 1956

A key to the adult males of Paracricotopus Brundin View in CoL

1. Gonostylus with conspicuous crista dorsalis................................................................ 2

– Gonostylus without conspicuous crista dorsalis............................................................. 10

2. Crista dorsalis large, covering close to half of gonostylus ( Chaudhuri & Som 1999: Figure 4 View FIGURE 4 )... P. missilus Chaudhuri & Som

– Crista dorsalis smaller, preapical, covering much less than half of gonostylus...................................... 3

3. Anal point apically rounded ( Sasa et al. 1988: Figure 11A9)..................... P. oyabeangulatus Sasa, Kwai & Ueno

– Anal point apically not rounded.......................................................................... 4

4. AR <0.5............................................................................................ 5

– AR ≥ 0.5............................................................................................ 6

5. Anal point short, around 25 μm long ( Niitsuma 1990: Figure 2 View FIGURE 2 ; Sasa & Okazawa 1992: Figure 9e); squama with 2–6 setae...................................................................................... P. tamabrevis (Sasa)

– Anal point long, around 40 μm long ( Niitsuma 1990: Figure 13); squama with 8–16 setae........... P. irregularis Niitsuma

6. Preapical crista dorsalis large............................................................................ 7

– Preapical crista dorsalis small........................................................................... 9

7. Halteres brown ( Fig. 4B View FIGURE 4 ). Costa extension short, 41–54 μm ( Fig. 4C View FIGURE 4 ). Anal point 32–55 μm long......... P. niger (Kieffer)

– Halteres whitish ( Fig. 5C View FIGURE 5 ). Costa extension long, 82–97 μm ( Fig. 5D View FIGURE 5 ). Anal point 19–26 μm long.... P. uliginosus (Brundin)

9. AR 0.7; anal point around 31 μm long, with up to 9 lateral setae ( Saether 1980b: Figure 1F View FIGURE 1 ); squama with 7 setae................................................................................................. P. glaber Saether

– AR 0.62–0.63; anal point around 26 μm, with 2–3 lateral setae ( Caldwell 1985: Figure1 View FIGURE 1 ); squama with 3 setae............................................................................................ P. millrockensis Caldwell

10. Anal point bare; inferior volsella small to reduced.......................................................... 11

– Anal point with lateral setae; inferior volsella large and well-developed......................................... 12

11. Anal point long; squama with 1 seta; inferior volsella a small digitiform lobe; gonostylus long and narrow bearing very small crista dorsalis ( Bhattacharyay & Chaudhuri 1988: Figure 1e View FIGURE 1 )................... P. insulatus (Bhattacharyay & Chaudhuri)

– Anal point extremely short; squama with 3–4 setae; inferior volsella well-reduced; gonostylus short and expanded medially, without crista dorsalis ( Steiner 1983: Figure 2 View FIGURE 2 )................................................. P. mozleyi Steiner

12. Crista dorsalis absent ( Sasa & Okazawa 1992: Figure 10g).......................... P. togakuroasi (Sasa & Okazawa)

– Crista dorsalis present................................................................................. 13

13. AR 0.28–0.37; anal point with 2–4 lateral setae ( Hazra et al. 2002: Figure 4 View FIGURE 4 ); wing length 0.9–1.12 mm .......................................................................................... P. spinicornis Hazra & Chaudhuri

– AR 0.9–1.0; anal point with up to 6 lateral setae ( Ghaderi et al. 2023: Fig.1d View FIGURE 1 ); wing length 1.3–1.5 mm .................................................................................................. P. davoodi Ghaderi et al.

A preliminary alternative key to the adult males of Paracricotopus Brundin

1. Tergites II– V with 2 lateral setae......................................................................... 2

– Tergites II– V with 3 or more lateral setae.................................................................. 5

2. Anterior basal and posterior marginal setae of tergite I arranged in 2 diagonal rows ( Figs. 7 View FIGURE 7 J-K)....................... 3

– Anterior basal and posterior marginal setae of tergite I arranged in 3 diagonal rows ( Figs. 7A & 7F View FIGURE 7 ).................... 4

3. Tergite I with anterior basal and posterior marginal setae in 3/4 format. Tergites II– V with numerous anterior basal and posterior marginal setae ( Fig. 7J View FIGURE 7 )................................................................. P. torbjorni sp. nov.

– Tergite I with anterior basal and posterior marginal setae in 1/3 format. Tergites II– V with few anterior basal and posterior marginal setae ( Fig. 7K View FIGURE 7 )............................................................... P. uliginosus (Brundin)

4. Tergite I with anterior basal and posterior marginal setae in 2/2/1 format. Tergites II– V with few anterior basal and posterior marginal setae ( Fig. 7A View FIGURE 7 )............................................................. P. davoodi Ghaderi et al.

– Tergite I with anterior basal and posterior marginal setae in 3/1/3 format. Tergites II– V with numerous anterior basal and posterior marginal setae ( Fig. 7F View FIGURE 7 )............................................... P. spinicornis Hazra & Chaudhuri

5. Tergite II with 3 lateral setae............................................................................ 6

– Tergite II with 4 or more lateral setae...................................................................... 8

6. Tergite I with anterior basal and posterior marginal setae in 3/3/1 format. Tergites III – V with 3 lateral setae ( Fig. 7H View FIGURE 7 )........................................................................................... P. tamabrevis (Sasa)

– Tergite I with anterior basal and posterior marginal setae in 2/1/2 format. Tergites III – V with 3 lateral setae ( Fig. 7I View FIGURE 7 )................................................................................. P. togakuroasi (Sasa & Okazawa)

7. Tergite I with 2 lateral setae; anterior basal and posterior marginal setae in 2/1 format ( Fig. 7D View FIGURE 7 ).......... P. mozleyi Steiner

– Tergite I with 3 lateral setae; anterior basal and posterior marginal setae in 3/2/4 format ( Fig. 7E View FIGURE 7 )......... P. niger (Kieffer)

8. Tergites II– V with five or more lateral setae ( Fig. 7C View FIGURE 7 )........................ P. insulatus (Bhattacharyay & Chaudhuri)

– Tergites II– V with 4 lateral setae......................................................................... 9

9. Tergite I with anterior basal and posterior marginal setae in 1/1/3/1 format. Posterior marginal setae of tergites II– V slightly diagonal ( Fig. 7B View FIGURE 7 )......................................................................... P. glaber Saether

– Tergite I with anterior basal and posterior marginal setae in 2/1/1/3 format. Posterior marginal setae of tergites II– V straight ( Fig. 7G View FIGURE 7 )............................................................................... P. sturae sp. nov.