Paracricotopus torbjorni Namayandeh & Ghaderi, 2025, sp. nov.
Creators: name: Namayandeh, Armin
name: Ghaderi, Edris
Publisher: name: Zenodo
Year: 2025
Subjects: Biodiversity
Taxonomy
Animalia
Arthropoda
Insecta
Diptera
Chironomidae
Paracricotopus
Paracricotopus torbjorni

description: Paracricotopus torbjorni sp. nov.
urn:lsid:zoobank.org:act: EC4B0476-4E78-478E-AAB4-6574B9FAAD98
Figs. 3 & 7J
Type material. Holotype: Male, Norway, Trøndelag, Trondheim, Sommerlystvegen, 75 moh, Malaise trap, 63.405˚N, 10.383˚E; 03.viii.2014; leg. E. Stur & T. Ekrem, det. E. Stur 2018; No. NTNU-VM 182902, BOLD ID: BIOUG16259 -C09; dep. NTNU.
Etymology. The new species is named in honor of Dr. Torbjørn Ekrem of NTNU, Norway, who collected the type specimen.
Diagnostic characters. The adult male of P. torbjornii can be separated from the closely related species by the combination of the following characteristics: Costa extension 40 μm long; tergite I with 2 lateral setae, median setae arranged in 2 diagonal rows, row 1 with single seta, row 2 with 3 setae, tergites II–VI with 2 lateral setae and tergites VII–VIII with 3 lateral setae, median setae in two parallel rows, tergites II–VIII median rows of setae straight; anal point short and bare; gonostylus with large preapical crista dorsalis.
Description. Male (n = 1).
Total length 2.1 mm. Wing length 1.3 mm. Haltere 259 μm long.
Coloration. Head, dark brown. Haltere brown. Wing greyish. Legs light brown. abdominal tergites brown; sternites whitish grey.
Head (Fig. 3A). Antenna missing. Eyes hairy, without dorsomedial extension, temporal setae 2 frontals. Tentorium tentorium 167 μm long. Clypeus rectangular, 79 μm long and 119 μm wide, bearing 12 setae, setae 41–54, 47 μm long. Palpal segments lengths (in μm): 54, 51, 71, 104, 142.
Thorax (Fig. 3B). Acrostichals 2 visible; dorsocentrals 7; prealars 3; scutellars 6 in single row. Antepronotal lobes developed, with small gap and bearing 2 setae.
Wing (Fig. 3C). Brachiolum with 1 seta. Squama with 6 setae. R with 3 setae, other veins bare. Costa extension 40 μm long. Anal lobe rounded. Microtrichia only visible at> 1000 x magnification.
Legs. Hind and mid femurs with keel. Pulvilli developed. Fore tibia spur 25 μm long, mid tibia spurs 15 and 14 μm long, hind tibia spurs 28 and 16 μm long; hind tibia comb with around 10 spines. Lengths and proportions of legs as in Table 3.
Abdominal tergite setation (Fig. 7J). Tergites I with 2 lateral setae, anterior basal setae, and posterior marginal setae arranged in 2 diagonal rows in 3/3 format. Tergites II–VIII with 2 lateral setae, anterior basal setae, and posterior marginal setae in two parallel rows. The majority of setae in rows are in close pairs.
Hypopygium (Fig. 3D). Tergite IX apically with around 2 setae close to anal point. Anal point 13 μm long and 8 μm wide, no lateral setae is detectable on this specimen. Transverse sternapodeme 73 μm long. Phallapodeme 44 μm long. Inferior volsella, a large lobe slightly curved, located at the mid-section of gonocoxite. Gonocoxite 132 μm long. Gonostylus with conspicuous preapical crista dorsalis; gonostylus 66 μm long; megaseta 10 μm long. HR 2.0, HV 3.1.
Female and immatures. Unknown.
Distribution. Palearctic: Norway, Romania.
description: Published as part of Namayandeh, Armin & Ghaderi, Edris, 2025, 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), pp. 138-158 in Zootaxa 5569 (1) on pages 143-145, DOI: 10.11646/zootaxa.5569.1.5, http://zenodo.org/record/14703998