Priocnemis (Priocnemis) sugonjaevi Lelej et Loktionov, 2015

Loktionov, V. M. & Kochetkov, D. N., 2022, Description of the hitherto unknown female of Priocnemis sugonjaevi Lelej et Loktionov, 2015 (Hymenoptera, Pompilidae), Far Eastern Entomologist 458, pp. 13-17 : 14-17

Priocnemis (Priocnemis) sugonjaevi Lelej et Loktionov, 2015

Figs 1–10

Priocnemis (Priocnemis) sugonjaevi Lelej et Loktionov, 2015 in: Lelej et al., 2015: 486, ♂;

Loktionov & Lelej, 2017: 22, ♂; Loktionov et al., 2017: 555, ♂.

TYPE MATERIAL EXAMINED. Holotype – ♂, Russia: Amurskaya oblast , Khinganskii

Nature Reserve, Antonovskoe forestry, environs of Kleshenskoe locality, 1–3.VIII 2014,

D.N. Kochetkov [ EATB].

OTHER MATERIAL EXAMINED. Russia: Amurskaya oblast , Khinganskii Nature Reserve : Arkharinskaya lowland, 27 km W Arkhara, environs of Yuzhnyi locality, 49°23ʹ21ʺN

129°42ʹ29ʺE, 1.VIII 2019, 1♀, 1♂, D.N. Kochetkov; same locality and collector, 12-15.VIII

2019, 1 ♀; Malyi Khingan Mountain Ridge, 3 km E Uril, Tarmanchukan River bassin,

49°13ʹ07ʺN 130°31ʹ48ʺE, 13.VII 2016, 1 ♂, D.N. Kochetkov; same locality and collector, 5 -

6.VIII 2016, 1 ♂; same locality and collector, 13-14.VIII 2018, 1 ♂ ; same locality and collector, 30-31.VIII 2018, 1 ♂ ; same locality and collector, 18-19.VIII 2021, 1 ♀ [ EATB] .

DIAGNOSIS. The female can be easily separated from those of all other congeners of

Priocnemis hyalinata species-group by combination of the following characters: the antenna shortened, the flagellomere 3 length 2.1–2.37 × its width ( Fig. 3 ) and fore wing evenly infuscate apically ( Fig. 8 ). The male is clearly distinguished from those of all other congeners of the group by combination of the following characters: the hypopygium with distinct subbasal emargination; the hypopygium length 1.5 × its width; ventral suberect setae on the volsella long and thin; length of apical spines on the paramere subequal to maximum width of the volsella.

DESCRIPTION OF FEMALE (hitherto unknown). Length: body 6.65–6.8 mm; fore wing 4.2–4.5 mm. Body completely black ( Figs 1, 2 ); one specimen with tergum 1 somewhat reddish-brown laterally. Body with sparse micropubescence. Body without setae, except following: upper frons with one gray erect setae; clypeus apically and mandible with long pale bristles; metasoma apically with erect setae. Head, meso-, metasoma, and legs matt.

Frons, meso-, and metanotum densely punctate, punctures small. Pronotum indistincly punctate. Metapostnotum with transverse striae anteriorly. Disc of propodeum somewhat shagrinate. Posterior face of propodeum with fine transverse striae. Metasomal terga micro-

reticulate, without distinct punctures.

Head width 1.07–1.13 × its length in frontal view. Vertex in frontal view barely convex

( Fig. 4 ), its posterior margin hardly arcuate or straight in dorsal view ( Fig. 3 ). Frons in profile convex ( Fig. 5 ); frontal line slightly imressed. MID 0.56–0.60 × head width in frontal view.

Gena width medially 0.47–0.52 × eye width in lateral view ( Fig. 5 ). Ocelli hardly raised forming barely acute-angled triangle ( Fig. 3 ). POD:OOD = 0.57–0.6. Clypeus width 2.58–

2.63 × its length, gradually convex medially; apicolateral corner rounded; apical margin straight ( Fig. 6 ). Apical margin of labrum slightly arcuate emarginated. Malar space short,

linear. Antenna distinctly shortened ( Fig. 3 ); flagellomere 1 length 2.78–2.9 × its width, 0.5–

0.53 × UID; flagellomere 3 length 2.1–2.37 × its width. Apical flagellomere pointed at apex.

Pronotum with anterior declivity not differentiated from its dorsum. Discs of mesonotum,

mesoscutellum and metanotum barely convex. Metapostnotum length 0.53–0.63 × metanotum length medially. Disc of propodeum evenly convex; antero-median groove indistinct. Tergum 1

not petiolate basally.Tarsal claws dentate; preapical tooth acute, same size or somewhat larger than apical tooth ( Fig. 10 ).

Fore wing infuscate, without milky-white spot preapically ( Fig. 8 ). Hind wing ( Fig. 9 ).

BIOLOGY. In Arkharinskaya lowland the species occurs in outer woods of broad-leaved forests with Quercus mongolica , Tilia amurensis , and Betula daurica . In Malyi Khingan

Mountain Ridge the species inhabits Quercus mongolica forest with Lespedeza bicolor and

Corylus sieboldiana var. mandshurica interspersed with dry rocky slopes of southern exposure.

antenna, head, and pronotum, dorsal view; 4 – head, frontal view; 5 – head, lateral view; 6 –

clypeus, frontal view; 7 – mesoscutellum, metanotum, metapostnotum, propodeum, and tergum 1 part., dorsal view; 8 – fore wing; 9 – hind wing; 10 – claw of fore leg. Scale bar:

0.5 mm for 8 and 9; 0.2 mm for 3–7; 0.1 mm for 10.

Priocnemis hyalinata species-group currently includes eight species. Seven of them are distributed in Palaearctic (from Europe in the West to Japan and Southern China in the East)

and one species in Nearctic ( USA). The representatives of the group are clearly distinguished within all congeners of nominotypical subgenus of the genus Priocnemis by enlarge preapical tooth of the claw, which is equal or larger than apical one in females and males, and by the paramere reduced, i.e. its length no more than half length of the volsella in males ( Loktionov et al., 2017).

The female of P. sugonjaevi possesses unique combination of characters which clearly distinguish it from females of all other congeners of the group: antenna shortened (flagellomere 3 length 2.1–2.37 × its width) and evenly infuscated fore wing apically (preapical milky-white spot is absent). The first character "antenna shortened" was known in the female of P. hyalinata (Fabricius, 1793) only, separating this species from all other congeners. The second character "fore wing evenly infuscated apically" was known in P. unicolor ( Gussakovskij, 1926) only, while all other species have fore wing with a distinct milky-white spot preapically.

Sexual dimorphism in the family Pompilidae is noticeably expressed. Due to this, in most cases it is not possible to combine sexes on the basis of morphological characters. Despite this, we consider the female and male as opposite sexes of the same species, P. sugonjaevi ,

based on the following indirect facts: females and males were collected in same places closely located to type locality of the species, moreover one female and one male were caught in one place in one day (see material examined); females of all other species occurring in Russia and Japan are already known ( Loktionov et al., 2017) .

AKNOWLEGMENTS

The research was carried out within the state assignment of Ministry of Science and

Higher Education of the Russian Federation (theme No.121031000151-3).

Figures

Figs 1–2. Priocnemis sugonjaevi Lelej et Loktionov, female from Amurskaya oblast, Russia. 1 – habitus, dorsal view; 2 – habitus, lateral view. Scale bar: 1 mm.

Figs 3–10. Priocnemis sugonjaevi Lelej et Loktionov, female from Amurskaya oblast. 3 –