Thrypticus kechevi Naglis & Negrobov 2020, sp. nov.
Creators: name: Negrobov, Oleg P.
name: Naglis, Stefan
Publisher: name: Zenodo
Year: 2020
Subjects: Biodiversity
Taxonomy
Animalia
Arthropoda
Insecta
Diptera
Dolichopodidae
Thrypticus
Thrypticus kechevi

description: Thrypticus kechevi Naglis & Negrobov sp. nov.
(Figs 3–4)
Type material. HOLOTYPE ♂: Turkey, Akyaka, pasture, 4 m, 37°03′09″N, 28°20′17″E, 23–27.ix.2012, Barták & Kubíc (CULSP). PARATYPE: 1 ♂, same data as holotype (CULSP).
Diagnosis. Antennal scape and pedicel yellow, postpedicel black, thorax and abdomen shiny metallic green, with yellow setae; legs entirely yellow; mid tibia with strong ad seta; scutellum with 2 strong marginal setae and 2 smaller lateral setae; surstylus and cercus yellow.
Description. Male. Body length (holotype): 1.8 mm, wing length 1.7 mm. Head: frons shiny metallic green, with blue reflections and weak grey pruinosity; face shiny blue, with violet reflections and dense grey pruinosity; palpus dark brown, with strong yellow seta; proboscis brown; antennal scape and pedicel yellow, postpedicel black, yellow on lateral side, roundish, as long as high; arista apical, with microscopic pubescense; postocular setae yellowish white. Thorax: mesonotum metallic green, with blue reflections and dense grey pruinosity; thoracic setae light yellow; 5 pairs of strong dc; 6–7 pairs of short ac; scutellum with 2 strong marginal setae, with 2 small lateral setae; 1 strong yellow ppl; pleura concolorous with mesonotum. Legs: coxae yellow, basal half brownish, remaining legs yellow, except tarsomere 5 brown, setae and hairs yellow except as noted. Fore leg: coxa anteriorly with small hairs and strong apical setae; remaining leg without major setae; relative podomere ratios: 32/31/16:7:5:3:4. Mid leg: coxa with some small anterior and 2 strong anterolateral setae; femur with 1 strong posterior preapical seta; tibia with 1 strong brown ad seta at 1/4 and 1 strong brown apical posterior seta; relative podomere ratios: 40/38/20:13:8:5:4. Hind leg: coxa with 2 strong lateral setae; tibia with ventral row of short erect setae and 1 small posterior apical seta; relative podomere ratios: 42/48/10:16:10:5:4. Wing: hyaline, veins light brown; basal section of M shorter than distal section; R 4+5 and M parallel; M joining costa at apex; CuAx ratio: 0.3; RMx ratio: 2.0; lower calypter yellowish white, with pale yellow setae; halter stem brown infuscated, knob yellowish white. Abdomen: shiny metallic green, with blue reflections, with pale yellow hairs and setae; tergite 8 light brown. Hypopygium (Figs 4A, B, C): epandrium dark brown with green reflections; cercus yellow, longer than surstylus, with long, slender apical projection; surstylus yellow, long and slender, parallel-sided, with 1 strong, yellow inwards curved ventral seta and 4 smaller apical setae; hypandrium black in basal half, yellow in apical half, asymmetric; phallus with broadened, flattened apex; epandrial lobes fused, of different length, each bearing strong apical seta. Female: unknown.
Etymology. The new species is dedicated to the Bulgarian dipterist, Mihail Kechev.
Remarks. Using the key in Negrobov & Stackelberg (1971 –77), the new species runs to T. viridis Parent, but can be distinguished by the characters given in the key below. The new species shows some similarity in the hypopygial characters with T. pruinosus (Fig. 9C) (see Remarks under that species) having a cercus with a strong apical projection, but the shape and chaetotaxy of the surstylus is quite different.
description: Published as part of Negrobov, Oleg P. & Naglis, Stefan, 2020, Two new species of Thrypticus Gerstäcker from Turkey (Diptera, Dolichopodidae) with checklist and key to Palaearctic species, pp. 111-125 in Zootaxa 4858 (1) on pages 115-116, DOI: 10.11646/zootaxa.4858.1.8, http://zenodo.org/record/4411639