A new species of Dolichopus from the Siberian Republic of Khakassia (Diptera: Dolichopodidae: Dolichopus latipennis species group) Текст научной статьи по специальности «Биологические науки»

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http://www.bgpu.ru/azj/ © Амурский зоологический журнал. VIII(4), 2016.250-253

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УДК 595.773.1

A NEW SPECIES OF DOLICHOPUS FROM THE SIBERIAN REPUBLIC OF KHAKASSIA (DIPTERA: DOLICHOPODIDAE: DOLICHOPUS LATIPENNIS SPECIES GROUP)

I.Ya. Grichanov

НОВЫЙ ВИД РОДА DOLICHOPUS ИЗ РЕСПУБЛИКИ ХАКАССИЯ, СИБИРЬ (DIPTERA: DOLICHOPODIDAE, ГРУППА ВИДОВ DOLICHOPUS LATIPENNIS)

И.Я. Гричанов

All-Russian Institute of Plant Protection, Podbelskiy roadway 3, St. Petersburg, Pushkin 196608, Russia. E-mail: grichanov@mail.ru

Key words: Diptera, Dolichopodidae, Dolichopus, new species, Palaearctic Region, Khakassia

Summary. A new long-legged fly species Dolichopus kosterini sp.nov. from Khakassia is described and illustrated. The new species belongs to the Dolichopus latipennis group and appears to be quite distinct in having mostly yellow antenna with relatively short scape and pedicel, in bearing long apicoventral seta on fore tibia, in rather distant from apex position of anterior preapical bristle on hind femur.

Всероссийский институт защиты растений, шоссе Подбельского 3, Санкт-Петербург-Пушкин 196608, Россия

Ключевые слова: Diptera, Dolichopodidae, Dolichopus, новый вид, Палеарктическая область, Хакассия

Резюме. Из Республики Хакассия описан новый вид мух-зеленушек Dolichopus kosterini sp.nov. из группы Dolichopus latipennis. Он отличается от других видов желтыми большей частью усиками, наличием длинной апиковентральной щетинки на передней голени, удаленным от вершины заднего бедра положением передней предвершинной щетинки.

INTRODUCTION

The genus Dolichopus Latreille, 1796 has an extremely high diversity of endemic and widely distributed species in the Holarctic Realm, with about 650 species worldwide [Grichanov, 2017]. The Dolichopus latipennis species group in the Palaearctic has been recently reviewed and keyed by Negrobov et al. [2009], and has comprised twelve species. Later Dolichopus lantsovi Negrobov, Grichanov & Barkalov, 2009, has been placed in synonymy with the Nearctic D. humilis Van Duzee, 1921 [Negrobov & Grichanov, 2013]. Dolichopus jakutus Seliva-nova & Negrobov, 2011, described by single male collected by A.K. Bagachanova from environs of Yakutsk, is very close to D. latipennis Fallen, 1823, occurring mainly in boreal areas of the Holarctic and being common in Yakutia; the two species differ in face coloration mainly, which is "ochre-yellow, dark-brown under antennae" in D. jakutus [Selivanova & Negrobov, 2011], but having dark-brown ground color, mostly whitish pollinose face, yellowish on clypeus in D. latipennis.

Here I describe a new species of that group, D. kosterini sp.n. from the Republic of Khakas-sia, which demonstrates further diffusion of characters discussed formerly as having generic importance. The new species appears to be quite distinct in having the mostly yellow antenna with relatively short scape and pedicel, in bearing long apicoventral seta on fore tibia (male secondary sexual character, or MSSC), in rather distant from apex position of anterior preapical bristle on hind femur.

Morphological terminology and abbreviations (for wing veins) follows Cumming & Wood [2009]. Body length is measured from the base of the antenna to the posterior tip of epandrium. Wing length is measured from the base to the wing apex. The relative lengths of the tarsomeres should be regarded as representative ratios and not measurements. Male genitalia were macerated in 10% KOH. Figures showing the male genitalia in lateral view are oriented as they appear on the intact specimen, with the morphologically ventral surface of the genitalia facing up, dorsal

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surface down, anterior end facing right and posterior end facing left. The holotype and paratype of a new species are housed at the Zoological Museum of Moscow State University, Moscow, Russia (ZMUM) and the Zoological Institute of the Russian Academy of Sciences, St. Petersburg, Russia (ZIN).

Dolichopus kosterini Grichanov, sp.nov.

(Fig. 1: 1-8)

Material examined: Holotype S, Russia: Khakassia, Shira district, Shira salt-lake env., 54.485°N/90.224°E, 350-355 m a.s.l., 2124.06.2011, K. Tomkovich leg. (ZMUM). Paratype 1 S: same label (ZIN). Description. Male (Fig. 1: 1). Body length 4.5 mm, wing length 4.0 mm, wing width 1.5 mm, antenna length 1.1 mm, hypopygium length 1.8 mm.

Head (Fig. 1: 2): Face with black-brown ground color, greyish white pollinose, nearly reaching lower eye margin, almost parallel-sided, in middle narrower than postpedicel height (0.12/0.19 mm). Proboscis and palpus small, with black hairs; palpus yellow, with short seta. Frons shining, metallic green-black, weakly pollinose. Antenna (Fig. 1: 3) mostly yellow, with pedicel black at dorsal apex, and postpedicel black on distal half; scape 1.5 times longer than high, with about 10 black dorso-lateral setae. Pedicel not longer than high, with ring of small apical setae; postpedicel bud-like, with pointed apex, slightly longer than high (0.27/0.19 mm); stylus bisegmented, about 1.5 times as long as scape, pedicel and postpedi-cel combined, shortly haired, simple, middorsal. Lower postocular setae white. Thorax: metallic bluish black; pleura weakly grey pollinose; proepisternum with 1 strong black seta and small white hairs.

Legs: mostly yellow; pulvilli white. Coxae with mainly black hairs; fore and mid coxae with black apical setae; hind coxa with 1 strong black seta at middle; fore coxa yellow, black at extreme base; mid and hind coxae black. Femora yellow, without long ventral setae; mid femur with strong anterior preapical bristle at about distal 1/4 and small posterior preapical seta, hind femur with 1 strong and long anterior preapical bristle at about distal 1/3 and several elongate dorsal setae at base. Fore and mid tibiae yellow; fore tibia with 3 antero- and 2 posterodorsal,

2 long posterior setae, 1 fine long apicoventral seta; mid tibia with 4 antero- and 2 posterodor-sal setae, 1 anteroventral seta. Hind tibia mainly yellow, black on distal 1/4, with black flat surface posteriorly on distal 2/3; slightly thickened distally, with 5-6 anterodorsal, 1 dorsal, 3 pos-terodorsal, 1-2 strong and few weak ventral setae, with small posterior apical tooth. All tarsi simple; pulvilli and claws small; fore and mid tarsi black from apex of basitarsus; hind tarsus black; hind basitarsus with 2 strong dorsal, 1 strong anterodorsal setae, with several short ventral setae. Tarsomere length ratio: fore tarsus (from first to fifth): 42/21/18/15/16, mid tarsus: 66/42/30/23/18, hind tarsus: 65/57/40/27/20. Wing (Fig. 1: 4): hyaline, weakly smoky on anterior half, widely rounded at apex. Costa with short large thickening at R1. R4+5 and M1+2 parallel at apex. M1+2 with strong curvation before middle of distal part. Distal part of CuA1 longer than dm-cu (0.55/0.41 mm). Hind margin of wing with distinct emargination between CuA1 and A2. Anal lobe large; anal angle right. Lower calypter yellow, with black cilia. Halter yellow. Abdomen: metallic dark green, black along sutures, with black setae. Hypopygium (Fig. 1: 5) large, black. Hypandrium brown, simple, with strong lateral tooth; basiventral epandrial lobes brown, large, asymmetrical; apicoventral epandrial lobe (Fig. 1: 7) brown, long, clavate, rounded at apex, with 1 strong seta at base and 1 blunt seta at apex. Surstyli (Fig. 1: 8) and postgonite brown, long and narrow. Cercus (Fig. 1: 6) nearly quadrate, mostly yellow, black and strongly serrate along distal margin; each tubercle with simple and long hooked flattened setae at apex. Female. Unknown.

Diagnosis. The new species is peculiar in having mostly yellow antenna with relatively short scape and pedicel (Fig. 1: 3), in bearing long apicoventral seta on fore tibia, in rather distant from apex position of anterior preapical bristle on hind femur. It has typical male wing morphology for Dolichopus latipennis group, but species of the latter has entirely black antennae except for D. zhelochovzevi Negrobov, 1976, which has black antenna with only antennal scape yellow ventral-ly and has no long apicoventral seta on fore tibia. In the general key to the Palaearctic Dolichopus (sensu stricto) species, D. kosterini sp.n. comes to

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Fig. 1. Dolichopus kosterini Grichanov, sp.nov.: 1 - habitus; 2 - head; 3 - antenna; 4 - wing; 5 -hypopygium; 6 - cercus; 7 - hypandrium and ventral epandrial lobes; 8 - surstyli

Рис. 1. Dolichopus kosterini Grichanov, sp.nov.: 1 - внешний вид; 2 - голова; 3 - усик; 4 - крыло; 5 - гипопигий; 6 - церка; 7 - гипандрий и вентральные лопасти эпандрия; 8 - сурстили

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either Far Eastern D. stackelbergi Smirnov, 1948, or to trans-Palaearctic D. linearis Meigen, 1824, strongly differing in the wing and hypopygium morphology, in the antenna and leg coloration [Negrobov et al., 2005].

Etymology. The species is named after the Russian entomologist, Dr. O.E. Kosterin (Novosibirsk).

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ACKNOWLEDGEMENTS

The author is sincerely grateful to Drs. A. Ozerov and N. Vikhrev (Moscow, Russia) who kindly provided specimens of Dolichopus for study. Prof. O. Negrobov (Voronezh, Russia) kindly commented on earlier draft of the manuscript.

I.Ya. Grichanov

REFERENCES

Cumming J.M., Wood D.M., 2009. Adult morphology and terminology [Chapter] 2. In: B.V. Brown, A. Borkent, J.M. Cumming, D.M. Wood, N.E. Woodley, M.A. Zumbado (Eds). Manual of Central American Diptera. Vol. 1. NRC Research Press, Ottawa. P. 9-50.

Grichanov I.Ya., 2017. Alphabetic list of generic and specific names of predatory flies of the epifamily Dolichopodoidae (Diptera), 2nd ed. VIZR, St.Petersburg. 563 pp.

Negrobov O.P., Grichanov I.Ya., 2013. On the distribution of Dolichopus humilis Van Duzee in the Palaearctic Region and a new synonym (Diptera: Dolichopodidae: Dolichopus latipennis species group). Zootaxa. 3599 (5). P. 499-500.

Negrobov O.P., Grichanov I.Ya., Barkalov A.V., 2009. The Dolichopus latipennis species group (=Hygroceleuthus Loew) in the Palearctic Region (Diptera: Dolichopodidae). Zootaxa. 2087. P. 37-45.

Negrobov O.P., Rodionova S.Yu., Maslova O.O., Selivanova O.V., 2005. Key to the males of the Palaearctic species of the genus Dolichopus Latr. (Diptera: Dolichopodidae). International Journal of Dipterological Research. 16 (2). P.133-146.

Selivanova O.V., Negrobov O.P., 2011. A new species of the genus Dolichopus (Diptera, Dolichopodidae) from Yakitia. Bulletin of Moscow Society of Naturalists, Biological Series. 116 (1). P. 64-65. In Russian.

Accepted: 19.12.2016 Published: 30.12.2016

nocmynuAaepeda^uw: 19.12.2016 Aamany6AUKa^w. 30.12.2016