Gorytes mikhailovi, Mokrousov & Proshchalykin, 2021

Mokrousov, Mikhail V. & Proshchalykin, Maxim Yu., 2021, The new species Gorytes mikhailovi sp. nov. from Kazakhstan with a key to the Palaearctic species of Gorytes Latreille, 1804 (Hymenoptera: Apoidea Crabronidae), Zootaxa 5006 (1), pp. 169-179 : 172-174

Gorytes mikhailovi sp. nov.

( Figs 1–12 )

http://zoobank.org/NomenclaturalActs/

Type material (5 ♀, 5 ♂). Holotype — ♀, «АлмА-АтА–Илийск РАЗЪЕЗД 68 4. VI.1953. Г. Викторов» [Kazakh- stan, Almaty – Iliysk , railway siding 68, 4. VI.1953, G. Viktorov] [ ZMMU] . Paratypes: ♀, ♂, same data as holotype [ ZMMU] ; 1 ♀, 1 ♂, Kazakhstan, Iliysk, 8. VI .1953, L. Zimina [ MMC] ; 2 ♀, 1 ♂, 28–30. V .1953, G. Viktorov [1 ♀ in ZISP, 1 ♀ and 1 ♂ in ZMMU] ; 1 ♂, Kazakhstan, Semirechie, Vernenskiy Distr, Otarskaya vill. [now Zham- byl Reion, Korday Distr., Otar vill., 43.54°N, 75.22°E], 1. VI .1922, Tashkent Entomol. Station coll. [ ZISP] ; 1 ♂, Kazakhstan, Zhambyl Region , 14 km SE of Hantau vill., 797 m, 44°11’12”N 73°58’32”E, 3. VI .2015, K.I. Fadeev [ MMC] .

Diagnosis. Gorytes mikhailovi clearly differs from all its congeners by the shape and punctation of S2 which is largely coarsely, irregularly punctate and in the middle slightly concave (S2 impunctate or with small regular punctures and evenly, slightly convex in the other species) and also by a distinctly elongate second metasomal segment, L/W = 0.9 × in female and 0.92 × in male (in the other species the second metasomal segment is distinctly wider than long). The propodeal sculpture is also unique, with the integument shiny, ridged and with deep, large puncture between ridges (impunctate or with small ill-defined puncture between ridges). Judging by other features, the species is most closely related to the Gorytes quinquefasciatus species group.

Description. Female ( Figs 1–6 , 12 ). Total body length 12.0– 14.6 mm (holotype 12.7 mm); fore wing length of holotype 9.5 mm. Coloration black with yellow and brownish pattern. Yellow are: narrow stripes on inner eye margin (narrower than MOD); clypeus (except narrow brownish apical edge); labrum; mandibles (except reddish apex); pronotal collar and lobe; tegula; mesopleural spot behind pronotal lobe; large transverse spot on mesoscutellum; large apical bands on T1 and T2 (with deep triangular median excision); narrow band on T3; interrupted narrow bands on T4–T5. One paratype with dorsolateral spots on propodeum. Antenna yellow basally (except dorsal dark marks on scape and pedicel), reddish apically. Leg coloration variable, in holotype hind coxa with yellow spot, mid and hind trochanters with apical rings; fore- and midfemora black with yellowish apex; hind femur yellow ventrally (except base), darkened dorsally; tibiae and tarsi predominantly yellow (fore tibia darkened on inner surface, hind tibia slightly darkened on outer surface). Wing slightly brownish with darkening in the area of the marginal cell; costal cell and stigma yellowish, veins brownish-yellow.

Head rounded in frontal view, ratio H/W = 0.9 ×. Inner eye margins conspicuously convergent toward clypeus, ratio of distance between antennal socket and eye to socket diameter = 0.47 ×. Ratio POL/OOL = 1.35 ×. Clypeus with central pit and setal brush, apical edge slightly emarginate medially. Frons with irregular, partially contiguous maсropunctures and with deep, longitudinal sulcus from anterior ocellus to antennal sockets. F1 ratio L/W = 2.87 ×, F2 1.85 ×; F10 slightly longer than wide.

Mesosoma. Acetabular carina short, lateral ends slightly bent backward, far from reaching sternaulus level (ventral view). Mesoscutum smooth and shiny with different sizes scattered macropunctures, not merging into furrows posteriorly. Mesopleuron smooth and shiny, with hardly visible subtle sparse punctures. Metapleuron and lateral surface of propodeum anterior to stigmal sulcus smooth and shiny, unridged. Metapostnotum with deep central groove and obliquely diverging ridges (ridges transverse apically) that continue into the ridges of propodeum. Propodeum shiny, between ridges with large deep punctures.

Wings. Venation typical for genus; hind wing media diverging before cu-a.

Legs. Forefemur not widened. Tarsal rake well developed.

Metasoma. T1 elongated, ratio L/W = 1.2 ×. T2 ratio L/W = 0.9 ×. S2 with large, coarse, irregular punctures ( Fig. 6 ), slightly concave in middle ( Fig. 12 ). S2–S5 and T1–T5 with scattered, small, but distinct punctures. Pygidial plate nearly triangular, sparsely irregularly punctate, with smooth and shiny interspaces.

Setation ill developed; erect setae on mesonotum lacking or represented by single setae. Frons, vertex, gena, mesoscutum, mesoscutellum, metanotum, metapostnotum and metasoma (except pygidium) with microscopic tomentum.

Male ( Figs 7–11 ). Total body length 10.2–13.2 mm. Coloration similar to females, but yellow pattern more developed: stripe on inner eye margin in most specimens not narrower than MOD; supraclypeal sclerite with yellow spot in some specimens; tergal bands wider and developed on T1–T6 ( Fig. 11 ); S2 with posterolateral spot. One male with large lateral spots on propodeum. Scape, pedicel and F1 predominantly yellow, F2–F11 dark dorsally and brownish or reddish ventrally; tyloids reddish. Hind tarsus brownish.

Head rounded in frontal view, ratio H/W = 0.87× ( Fig. 9 ). Inner eye margins conspicuously convergent toward clypeus, ratio of distance between antennal socket and eye to socket diameter = 0.39 ×. Ratio POL/OOL = 1.46 ×. Clypeus without central pit and setal brush, apical edge slightly emarginate medially. Frons with irregular, partially contiguous macropunctures and with deep longitudinal sulcus from anterior ocellus to antennal sockets. Tyloids on F1 ill defined, on F2–F4 broad and almost along entire length, on F5 developed only at basal half, on T 6 in form of small tubercle at base ( Fig. 8 ).

Mesosoma and wings similar to female.

Legs. Tarsal rake lacking.

Metasoma. T1 slightly elongated, ratio L/W = 1.1 ×. T2 ratio L/W = 0.92 ×. S2 similar as in female. Punctation, except apical segments, similar to female.

Setation similar as in female.

Etymology. The specific epithet is a patronym honoring Kirill G. Mikhailov (Moscow, Russia) on the occasion of his 60th birthday and in recognition of his many contributions to the study of spider diversity and publisher of scientific journals and many books on biology.

Distribution. Southeastern Kazakhstan (Zhambyl and Almaty Regions).

Figures

FIGURES 1–6. Gorytes mikhailovi sp. nov., holotype, female: 1—habitus, dorsolateral view; 2—labels; 3–4—head, frontal view (3), dorsal view (4); 5—mesoscutellum, metanotum and propodeum, dorsolateral view; 6—base of metasoma, ventrolateral view. Scale bar: 2.0 mm.

FIGURES 7–11. Gorytes mikhailovi sp. nov., paratype, male: 7—habitus, lateral view; 8—F1–F6, ventral view; 9–10—head, frontal and dorsal view; 11—metasoma, dorsal view. Scale bar: 2.0 mm.

FIGURES 12–15. Metasomal base, lateral view (12, 13) and mesoscutellum, metanotum and propodeum, dorsolateral view (14, 15) of Gorytes females: 12—G. mikhailovi sp. nov., paratype; 13—G. pleuripunctatus (A. Costa); 14—G. hebraeus de Beaumont; 15— G. fallax Handlirsch.