Chrysotus tricaudatus Negrobov, Barkalov & Selivanova, sp. nov.

• Main Authors: Barkalov, Oleg P. Negrobov Anatolij V., Selivanova, Olga V.
• Format: Other/Unknown Material
• Language: unknown
• Published: Zenodo 2014
• Subjects: Biodiversity; Taxonomy; Animalia; Arthropoda; Insecta; Diptera; Dolichopodidae; Chrysotus; Chrysotus tricaudatus; Taimyr
• Online Access: https://doi.org/10.5281/zenodo.6137943; http://treatment.plazi.org/id/03E83341FFEE2640ECDCFE0BD7B6F8A1

Chrysotus tricaudatus Negrobov, Barkalov & Selivanova, sp. nov. (Figs 1A–C) Type material . HOLOTYPE , ♂ labeled: Russia: Taimyr Reserve, Ary-Mas field station, left bank of river Novaya, 14 m a.s.l., inundated terrace, 72.5˚N, 101.94˚E, 10–12.VII.2010, coll. A. Barkalov (SZM). PARATYPES : Russia : 9 ♂, same data as holotype, coll. A. Barkalov; 1 ♂, Krasnoyarskij Kraj, Taimyr Peninsular left bank of river Zakharova Rassokha 72.7˚N, 101.05˚E, 11–20.VII.2011, coll. A. Barkalov (SZM and VSU). Diagnosis . Face narrow; postpedicel small; lower postocular setae white; fore coxa with white hairs; femora green-brown; mid tibia with 2 anterodorsal and 2 posterodorsal setae; hind femur and tibia without long setae and hairs; phallus with two lateral processes on tip. Description . Male : Body length: 2.0– 2.2 mm, wing length: 1.9–2.3 mm. Head : Frons green with purple tinge, without pollinosity. Eyes not contiguus. Face green, with brown pollinosity, narrow, lower part several times narrower than postpedicel. Antenna (Fig. 1B) black, postpedicel small, transversely oval with rounded tip, nearly 2x wider than long; arista apical, with short hairs. Ratio of postpedicel length to width and arista length: 0.7/1.0/3.1. Proboscis brown. Palpus brown with black hairs without silver pollinosity. Lower postocular setae white. Thorax: Metallic green, scutum with bronze tinge and fine grey pollinosity. Pleura with pollinosity denser than scutum, proepisternum with light setae. Six pairs of strong dorsocentral setae. Acrostichal setae long, arranged in two rows. Scutellum with 2 long and 2 short lateral setae. Legs: Fore coxa with white hairs, mid and hind coxae with dark hairs; fore trochanters yellowish-brown. Femora mostly greenish-brown, except narrowly yellow tips. Fore femur with long white anteroventral hairs, length approximately equal to femur width. Fore tibia and tarsus with short hairs. Ratio of fore tibia and tarsus (from 1st to 5th): 2.5/1.1/0.5/0.2/0.2/0.3. Mid and hind femora with short anteroventral hairs. Mid ...