Eumerus turcmenorum Paramonov, 1927: 324

Mutin, V. A. & Barkalov, A. V., 2018, New data on the hover-flies of the genus Eumerus (Diptera: Syrphidae) from Russia, Far Eastern Entomologist 363, pp. 11-20 : 18-19

Eumerus turcmenorum Paramonov, 1927: 324 , syntypes: Turkmenistan: 1♀, “Repetek,

Transcaspia”, 25.IV 1926, leg. Paramonov; 1♂, in the same place, [1.V 1926], leg.

Paramonov.

SPECIMENS EXAMINED. Russia: Tyva Republic: Dyttykh-Khem River, 12 km SW

Samagaltai settlement, 19.VII 2014, 1♀ (M. Proshchalykin, A. Lelej & V. Loktionov); Tore-

Khol’ Lake , 27 km SSW Erzin, 12.VII 2014, 2♀ (M. Proshchalykin, A. Lelej & V.

Loktionov ). Turkmenistan: Repetek, 16.IX 1978, 1 ♂ (A. Lelej) [ PMC] .

DIAGNOSIS. The species differs from the majority of Eumerus spp. by its wing membrane with strongly reduced microtrichia ( Fig. 5 ). Face, frons and vertex with white dense pile. Antennae from reddish to almost black in the smallest females. Basoflagellomere with a pattern that includes a subbasal arched crease connected with a few radial creases on the distal part. Abdomen with three pairs of pale pollinose maculae on 2nd, 3rd and 4th terga.

Maculae of 3rd and 4th terga are more oblique with teardrop-shaped medial top, that is expressed especially in females ( Fig. 4 ). The lateral swollen surface of 2nd tergum with a brownish subtriangular mark, more or less reduced in some females. Metafemur with a pair of setate flanges apico-ventrally divided by a bare groove. Anterior flange more carinate,

with 11–12 strong long setae in the male and 7–8 long setae in the female. Posterior flange with a smaller number of setae. Metatibia with a pair of setulate flanges baso-ventrally.

REMARKS. 7♂ and 4♀ from Repetek ( Turkmenistan) were taken by Paramonov for describing the species. At present one male and one female, designated as syntypes, are kept in the I.I. Schmalhausen Institute of Zoology (the National Academy of Sciences of Ukraine,

Kiev) (Popov, 2011b). G.V. Popov assumes that the other syntypes were lost. We have studied the genitalia of the male, collected in the type-locality ( Fig. 22 ). The male complies fully with the original description of Eumerus turcmenorum and characters of the male syntype, which was examined by G.V. Popov at our request. Our females are also similar with syntype females. This species was mentioned in the revision of Palaearctic species of the genus Eumerus (Stackelberg, 1961) from sandy deserts of the Middle Asia and Kazakhstan.

An incorrect spelling of the species epithet as " turkmenorum " was probably used by

Stackelberg (1949) for the first time. This change does not comply with the Code of International Zoological Nomenclature (Article 32, paragraph 32.5.1).

DISTRIBUTION. Russia (new record): Tyva Republic. – Central Asia ( Turkmenistan),

West Kazakhstan.

We thank Arkadiy Lelej, Maxim Proshchalykin and Valery Loktionov (Federal Scientific

Center of the East Asia Terrestrial Biodiversity, Far East Branch of the Russian Academy of

Sciences, Vladivostok) for collected material. We are indebted to Valery Loktionov and

Galina Azarkina (Institute of Systematics and Ecology of Animals, Novosibirsk) for help with making photos for the article.

We are grateful to Olga Ovchinnikova, the curator of the hoverfly collection of the

Zoological Institute of the Russian Academy of Sciences (St. Petersburg) for the opportunity to study the type material of the genus Eumerus ; Grigory Popov for help in comparing some characters of examined specimens of E. turcmenorum with the syntypes, which are kept in

I.I. Schmalhausen Institute of Zoology (the National Academy of Sciences of Ukraine, Kiev).

We wish to thank Francis Gilbert (University of Nottingham, UK) for checking the English.

The work was conducted partly with the financial support of the Ministry of Education and Science of the Russian Federation, within the scope of the basic role of the state in the sphere of scientific activity (project 6.8601.2017/8.9) and partly with support of the Russian

Foundation for Basic Research, grant No. 16-04-00194-a and 15-29-02479. The study of A.V

Barkalov was partly supported by the Federal Fundamental Scientific Research Programme for 2013-2020 (АААА- А16-116121410121-7).

Figures

Figs 1–5. Eumerus spp.: 1–3 – E. montanum; 4–5 – E. turcmenorum; 1 – female, lateral

Figs 19–22. Eumerus ssp.: 19 – female head of Eumerus strigatusm, dorsal view; 20–21