A review of Paracricotopus (Brundin, 1947), with the description of two new species and redescription of the adult males of Paracricotopus niger (Kieffer, 1913) and Paracricotopus uliginosus (Brundin, 1947) sensu Saether (1980) (Chironomidae: Diptera) Author Namayandeh, Armin Department of Environmental and Life Sciences, Trent University, 1600 West Bank Drive, Peterborough, Ontario, Canada. Author Ghaderi, Edris Department of Fisheries Sciences, Faculty of Natural Resources, University of Kurdistan, Sanandaj, Iran. & Department of Fisheries and Aquatic Ecology, Faculty of Fisheries and Environmental Sciences, Gorgan University of Agricultural Sciences and Natural Resources, Gorgan, Iran. text Zootaxa 2025 2025-01-13 5569 1 138 158 https://doi.org/10.11646/zootaxa.5569.1.5 journal article 10.11646/zootaxa.5569.1.5 1175-5326 14703998 EA597E31-AF95-4D31-A14E-9455D6B335B1 A key to the adult males of Paracricotopus Brundin 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 )... 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 ; 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 ). Costa extension short, 41–54 μm ( Fig. 4C ). Anal point 32–55 μm long......... P. niger (Kieffer) – Halteres whitish ( Fig. 5C ). Costa extension long, 82–97 μm ( Fig. 5D ). 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 ); 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 ); 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 )................... 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 )................................................. 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 ); 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 ); 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 J-K)....................... 3 – Anterior basal and posterior marginal setae of tergite I arranged in 3 diagonal rows ( Figs. 7A & 7F ).................... 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 )................................................................. 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 )............................................................... 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 )............................................................. 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 )............................................... 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 )........................................................................................... 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 )................................................................................. P. togakuroasi (Sasa & Okazawa) 7. Tergite I with 2 lateral setae; anterior basal and posterior marginal setae in 2/1 format ( Fig. 7D ).......... P. mozleyi Steiner – Tergite I with 3 lateral setae; anterior basal and posterior marginal setae in 3/2/4 format ( Fig. 7E )......... P. niger (Kieffer) 8. Tergites II– V with five or more lateral setae ( Fig. 7C )........................ 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 )......................................................................... 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 )............................................................................... P. sturae sp. nov.