Rohdendorfia khakimovi Barkalov, 2019

Mengual, Ximo & Barkalov, Anatolij V., 2019, Two new species of Rohdendorfia (Diptera: Syrphidae) from Central Asia, Acta Entomologica Musei Nationalis Pragae 59 (1), pp. 325-336 : 329-331

Rohdendorfia khakimovi Barkalov , sp. nov.

( Figs 1 , 12–14 , 18–24 , 35)

Type locality. Tajikistan, Gorno-Badagshan Autonomus Region, Pamir, mountain pass Koi-Tezek, 37°29′ N 72°47′ E, 4370 m a.s.l. ( Fig. 1 ).

Type material. HOLOTYPE: ♁, “ Tajikistan, Gorno-Badakhshan // Autonomous Region // Pamir, pass Koi-Tezek // 4370 m asl, 37°29′ N 72°47′ E // 17.vii.2018 (Leg.A. Barkalov) // Rhodendorfia // khakimovi // Barkalov sp. n. ” // Holotype ” [ ISEA] . PARATYPES: 5 ♁♁ 28 ♀♀, same place and date as holotype, Leg. A. Barkalov [ ISEA]; 7 ♀♀, same place and date as holotype, Leg. V. Zinchenko [ ISEA]; 1 ♁ 2 ♀♀, same place and date as holotype, Leg. A. Barkalov [ ZFMK, ZFMK-DIP-00055236–DNA voucher D412,...55237, ...15937–DNA voucher D410]; 2 ♀♀, TAJIKISTAN: Gorno-Badagshan Autonomus Region, Shungan District, environs of kishlak Nishusp, Bigshondara gorge, 20.vii.2018, Leg. A. Barkalov [ ISEA].

Description. Male. Head ( Figs 18−19, 22 ). Face black, with distinct facial tubercle, concave below antennal insertion, pale pilose, with two stripes of grey dusting laterally, central part and lower part shiny. Mouth edge protruding, shiny. Gena low, shiny, black, with short black pilosity. Lunula black, shiny. Frontal triangle black, black and white pilose, shiny medially, with dense grey silver pollinosity laterally on eye margin. Eyes bare, connected for distance as long as vertical triangle. Vertical triangle distinctly upraised, black shiny, black pilose. Antenna black, with dense grey pollinosity, basoflagellomere yellowish ventro-basally; arista short, thick, black. Occiput black, pale pilose, shiny on dorsal 1/2 and with grey pollinosity on ventral 1/2.

Thorax ( Figs 18−19 ). Scutum and scutellum black, shiny with short white and longer black fine pile; postpronotum bare; subscutellar fringe with pale pile. Pleuron black, shiny, pale pilose; metaepisternum and metasternum bare; calypter white; halter pedicel dark brown, capitulum white. Wing hyaline, entirely microtrichose; stigma dark brown.Alula brown, broader than costal cell. Legs simple, entirely black, with short pile; metafemur finely swollen medially, covered with yellow and black long pile, shorter than metafemur width ( Fig. 24 ).

Abdomen ( Figs 18−19, 24 ). Unmargined, parallel-sided, with short, erect pale pile, longer on sides of terga 1–2. Tergum 1 black; tergum 2 black with two small yellow maculae; terga 3–4 mostly orange-yellow with black anterior and posterior margins; tergum 5 mostly black with orange lateral sides. Male genitalia as in Figs 12−14 .

Female ( Figs 20–21, 23 , 35). Similar to male except for sexual dimorphism and: frons comparatively broad ( Fig. 23 ) with black pile medially and pale pile laterally; scutum with pile of equal length; pile on swollen central part of metafemur shorter than in male and adpressed; tergum 2 orange with narrow black fascia anteriorly and posteriorly ( Figs 20–21 ).

Variation. Some male specimens have completely black basoflagellomere.

Length (n=5). Body: 4.8–7.2 mm; wing: 4.1–5.7 mm.

Genetics. The GenBank accession numbers for this species are: COI gene ( MK415827 , specimen ZFMK-DIP-00015937; MK415828 , specimen ZFMK- DIP-00055236). The two obtained COI sequences were almost identical, with only one nucleotide change between specimens ZFMK-DIP-00015937 and ZFMK- DIP-00055236.

Differential diagnosis. See the diagnosis of R. bella Mengual sp. nov. Males of R. khakimovi Barkalov sp. nov. and R. bella Mengual sp. nov. can be distinguished by the shape of the male genitalia. Females of R. khakimovi Barkalov sp. nov. have triangular grey pollinose maculae on frons.

Etymology. The species is named in honor of the director of the Institute of Zoology and Parasitology of the Academy of Sciences of the Republic of Tajikistan, Dr. Fayzali R. Khakimov, who organized the expedition to the Pamir region.

Biology. Adult flies were resting on stones and from time to time, they flew short distances of approximately 30– 50 m. There were no flowers in this locality, and adult flies were concentrated in a small gorge, probably due to the absence of wind. Most of the adult flies were females, but some males, which look slightly different in the field, were also collected. Geographical distribution. Only known from the type locality.

Figures

Fig 1. Type locality of Rohdendorfia khakimovi Barkalov,sp. nov. in Tajikistan (37°29′ N 72°47′ E).

Figs 9–17. Male genitalia. 9–11 – Rohdendorfia bella Mengual, sp. nov. 9 – epandrium, dorsal view; 10 – epandrium, lateral view; 11 – hypandrium, lateral view. 12–14 – Rohdendorfia khakimovi Barkalov, sp. nov. 12 – epandrium, dorsal view; 13 – epandrium, lateral view; 14 – hypandrium, lateral view. 15–17 – Rohdendorfia alpina Sack, 1938 (adapted from CLAUSSEN 1988). 15 – epandrium, dorsal view; 16 – epandrium, lateral view; 17 – hypandrium, lateral view. Scale bars = 0.2 mm.

Figs 18–24. Rohdendorfia khakimovi Barkalov, sp.nov.18–19 – paratype male (ZFMK-DIP-00055236):18 – dorsal view;19 – lateral view.20–21 – paratype female (ZFMK-DIP-00055237):20 – dorsal view; 21 – lateral view.22 – paratype male (ZFMK-DIP-00055236), frontal view.23 – paratype female (ZFMK- DIP-00055237), frontal view. 24 – paratype male (ZFMK-DIP-00055236), metaleg and sterna, lateral view. Scale bars: 18–21 – 1 mm, 22–24 – 0.5 mm.