Toxoneura biamoensis Ozerov et Krivosheina, 2023

Ozerov, A. L. & Krivosheina, M. G., 2023, To the fauna of Pallopteridae (Diptera) of Russia, Russian Entomological Journal 32 (2), pp. 234-238 : 235-238

Toxoneura biamoensis Ozerov et Krivosheina , sp.n.

Figs 3, 4 .

MATERIAL. Holotype male, labeled “Примор. кр./р. Биамо 14.VIII.1976 Н. Синиченкова” [ Russia: Primorsky Krai, Biamo River [now = Bol’shaya Svetlovodnaya River ] (ca. 46.392ºN, 137.086ºE), 14.VIII.1976, N. Sinichenkova] ( ZMUM).

DESCRIPTION. Male ( Fig. 3 ). Length of body ca. 3.0 mm. Length of wing 3.2 mm. Body in ground colour, antennae and legs pale yellow; postcranium black in upper third ( Fig. 4 ); scutum with large black spot ( Fig. 4 ); mediotergite and abdominal tergites 1–4 mostly blackish.

Head in profile about as high as wide. Length of frons slightly more than its width. Height of gena below eye is about 1/3 of vertical diameter of eye. Head with 1 orbital, 1 ocellar, 1 outer vertical, and 1 inner vertical setae; postocellar absent. Gena and postcranium with thin black setulae. Postpedicel approximately 1.2 times as long as wide. Arista long, short haired on whole length; the longest setulae on arista equal to basal diameter of arista.

Thorax. Scutum shiny, covered with short yellow hairs, with the following paired setae: 1 notopleural (posterior), 1 postalar, 1 postsutural dorsocentral ( Fig. 4 ). Scutellum shiny, with two pairs of setae approximately equal to each other. Pleural sclerites subshining.

Legs covered with yellow hairs, without striking setae.

Wing surface transparent with two dark areas: along crossvein dm-cu and at apex ( Fig. 3 ). Veins very short setulose only.

Abdomen covered with yellow setulae, without noticeable setae.

SIMILARITY. The new species is more similar to Toxoneura ambusta (Meigen, 1826) and Toxoneura shatalkini (Ozerov, 1993) in wing pattern ( Fig. 3 ), but clearly differs from both species by the absence of supra-alar seta, only one notopleural (posterior) and one postalar setae. T. ambusta and T. shatalkini have supra-alar seta, 2 notopleural and 2 postalar setae. All the three species differ from each other in the pattern on the scutum ( Figs 4–6 ): scutum of T. ambusta

6

yellow with four black stripes ( Fig. 5 ), scutum of T. shatalkini has large shiny black spot ( Fig. 6 ), and T. biamoensis with spot as in Fig. 4 . Some European dipterists believe that the drawing on the scutum of T. ambusta and T. shatalkini is a color variation [https://diptera.info/forum/viewthread. php?thread_id=92819].

Checklist of the family Pallopteridae of

Russia

EURYGNATHOMYIINAE

Eurygnathomyia Czerny, 1904

bicolor ( Zetterstedt, 1838) ( Sciomyza )

PALLOPTERINAE

Gorbunia Ozerov, 1993

insularis Ozerov, 1993 ( Gorbunia )

Palloptera Fallén, 1820

formosa Frey, 1930 ( Palloptera )

marginata (Meigen, 1826) ( Sapromyza )

umbellatarum (Fabricius, 1775) ( Musca )

ustulata Fallén, 1820 ( Palloptera )

Toxoneura Macquart, 1835

= Temnosira Enderlein, 1936

ambusta (Meigen, 1826) ( Sapromyza )

basimaculata (Czerny, 1934) (Palloptera) biamoensis Ozerov et Krivosheina , sp.n. (Toxoneura) carterosoma Ozerov, 1993 ( Toxoneura )

czurkini (Ozerov, 1993) ( Temnosira )

ephippium (Zetterstedt, 1860) (Palloptera) = septentrionalis (Czerny, 1934) (Palloptera) laetabilis (Loew, 1873) ( Palloptera )

longipennis (Czerny, 1934) ( Palloptera )

modesta (Meigen, 1830) ( Opomyza )

nigriscutata (Ozerov, 1993) ( Temnosira )

orientana (Kovalev, 1972) (Palloptera) quinquemaculata (Macquart, 1835) (Sapromyza) saltuum (Linnaeus, 1758) ( Musca )

shatalkini (Ozerov, 1993) ( Temnosira )

trichaeta (Ozerov, 1993) ( Temnosira )

trimacula (Meigen, 1826) ( Sapromyza )

usta (Meigen, 1826) ( Sapromyza )

= paralia Ozerov, 1993 ( Toxoneura )

venusta (Loew, 1858) ( Palloptera )

Acknowledgements. The investigation was fulfilled within the state project of the Institute of the Ecology and Evolution RAS (M.G. Krivosheina) and the State project No 121032300105-0 (A.L. Ozerov).

Figures

Fig. 3–6. Male holotype in lateral view (3) and scutum (4–6) of Toxoneura spp.: 3, 4 — T. biamoensis sp.n.; 5 — T. ambusta (Meigen); 6 — T. shatalkini (Ozerov). Рис. 3–6. Самец, голотип сбоку (3) и среднеспинка (4–6) Toxoneura spp.: 3, 4 — T. biamoensis sp.n.; 5 — T. ambusta (Meigen); 6 — T. shatalkini (Ozerov).