Trichocoelina dicksoni Vilkamaa & Menzel 2019, sp. n.

• Main Authors: Vilkamaa, Pekka, Menzel, Frank
• Format: Other/Unknown Material
• Language: unknown
• Published: Zenodo 2019
• Subjects: Biodiversity; Taxonomy; Animalia; Arthropoda; Insecta; Diptera; Sciaridae; Trichocoelina; Trichocoelina dicksoni; Arkhangelsk; Dikson Island; Novaya Zemlya; Arkhangelsk Oblast
• Online Access: https://doi.org/10.5281/zenodo.4340436; http://treatment.plazi.org/id/A703878CA95AFFACFF26FBF199DC0CD6

Trichocoelina dicksoni sp. n. Figs 2 B, 3 D Material studied . Holotype male . RUSSIA, Krasnoyarsk region, Dikson Island, Konus Islet, Korotkevich, 31.VII.1948 (in ZIN). Paratypes . RUSSIA, same data as holotype, 3 males (1 in SDEI, 2 in ZIN). Other material . RUSSIA, Arkhangelsk oblast, Novaya Zemlya, Tuylenya Zaliv, 10.VII.1901, Timofeev, 1 male (in ZIN); Kemerovsk oblast, river Mrassu on upper river Tom, 15.VII.1908, Hvorov, 1 male (in ZIN). Description . Male. Head . Face brown, maxillary palpus pale yellowish. Eye bridge and face not well visible in the specimens studied. Clypeus with 2–3 setae. Maxillary palpus with 3 segments, 1 st segment longer than 3 rd segment, 2 nd segment shortest; 1 st segment with 5–6 setae, with dorsal patch of sensilla; surface of antennal flagellomeres smooth, body of 4 th antennal flagellomere 2.25–2.35x as long as wide, the neck shorter than broad, the longest setae shorter than the width of flagellomere. Thorax . Dark brown, setae pale. Anterior pronotum with 7–12 setae. Proepisternum with 8–17 setae. Scutellum with 4 longer and some short and fine setae. Wing . In poor condition in the specimens studied. Fumose. Length 2.2–2.3 mm. Anal lobe weak. Veins distinct. c/w 0.55. Halter yellow. Legs . Yellow, coxal setae pale. Fore tibial organ forming a patch in depression. Fore tibial spur longer than the tibial width. Abdomen . Pale brown, setae pale and fine. Hypopygium (Fig. 2 B). Brown, as abdomen. Intergonocoxal area moderately long, with 2 long separate setose lobes. Gonocoxa moderately broad, slightly longer than gonostylus, medial margin basally strongly curved, with sparse setosity. Gonostylus (Fig. 3 D) long, apically truncate, strongly impressed; with normal setosity, a short apical tooth, and 7 rather short and slender megasetae; with 1 well-differentiated whiplash seta on ventromedial margin of the apical fourth of gonostylus. Tegmen subtriangular, laterally slightly curved, apically roundish, laterally and apically sclerotized; aedeagal teeth not detectable in the ...