Tanytarsus latens Giłka & Paasivirta & Gadawski & Grabowski 2018, sp. nov.

• Main Authors: Giłka, Wojciech, Paasivirta, Lauri, Gadawski, Piotr, Grabowski, Michał
• Format: Other/Unknown Material
• Language: unknown
• Published: 2018
• Subjects: Biodiversity; Taxonomy; Animalia; Arthropoda; Insecta; Diptera; Chironomidae; Tanytarsus; Tanytarsus latens; Black Head; Canada; Rauma; Rovaniemi; Salmela
• Online Access: https://zenodo.org/record/6495701; https://doi.org/10.5281/zenodo.6495701

Tanytarsus latens sp. nov. Type material. Holotype (DIZUG), adult male specimen (excl. thorax) slide-mounted in Canada balsam: FINLAND, OSTROBOTHNIA BOREALIS, Palokkaanlampi and Rumajärvi ca. 40 km W of Rovaniemi (66°26'N 24°56'E), 7–28 August 2017, Malaise trap, J. Salmela. Paratypes: sampling data as holotype: 1 male (excl. thorax) in Canada balsam, 5 males + 1 hypopygium in Euparal (DIZUG); SATAKUNTA, Kauklastenjärvi ca. 15 km SE of Rauma (61°04'N 21°46'E), 17 August 2010, 1 male (in Euparal), hand net, L. Paasivirta (LP). DNA voucher: DNA extracted from thorax tissue in elution buffer (MIZ PAS). Derivatio nominis. From the Latin adjective meaning concealed or disguised by others. Diagnosis. Darkly coloured, relatively big [wing length: 2245–2540 (2430) µm]. Frontal tubercles small, 2–12 µm long at most. Anal tergite bands of H-type, with broad median connection. Anal point slender, with narrowly rounded apex and 2–3 spinulae. Superior volsella rounded at base, elongate, tapering towards tip, usually with apical nose curved medially. Stem of median volsella straight, slightly swollen in distal half, with irregularly arranged subulate lamellae. Description. Adult male (n = 8 + 1 male hypopygium). Colouration (in alcohol). Eyes black. Antenna, tentorium, scutal stripes, scutellum, postnotum, sternum, hypopygial apodemes and proximal leg segments, incl. femora and tibiae dark brown to black. Head capsule, mouthparts, ground colour of thorax, tarsi and abdomen brown with slight olive undertone. Wing and haltere pale brownish. Head. Eyes reniform, with dorsomedian extension gradually narrowing from 5 facets at base to 4: 4: 3/2 facets medially. Antenna with 13 distinct flagellomeres, AR 1.53–1.78 (1.66), plume fully-developed. Frontal tubercles minute, usually in shape of tiny swellings (2–3 µm), rarely conical or cylindrical, 12 µm long at most (Fig. 1A, B). Lengths of palpomeres 2–5 (in µm): 60–72 (63), 155–183 (172), 143–163 (156), 198–258 (244); pm3 always longer than pm4. Clypeus with 17–24 setae. Thorax ...