Hoplisoides flavescens Mokrousov, 2020

Mokrousov, Mikhail V., Proshchalykin, Maxim Yu. & Maharramov, Mahir M., 2020, Digger wasps of the genus Hoplisoides Gribodo (Hymenoptera, Crabronidae, Bembicinae) from the Palaearctic region, with description of two new species, Journal of Hymenoptera Research 79, pp. 213-233 : 213

4. Hoplisoides flavescens Mokrousov sp. nov.

Figures 1A-E , 2A-F

Material examined.

Holotype ♀: Azerbaijan, Nakhichevan AR / Julfa, Daridagh / 38°59'N, 45°40'E 900 m / 20.VI 2019 Proshchalykin, / Aliyev, Maharramov // Holotype ♀ / Hoplisoides flavescens / Mokrousov [ZISP]; Paratypes: ♀, same data as holotype but differing as for the collection date, 16.VI.2019 [ZISP] ; ♀, same data as holotype but differing as for the collection date, 17.VI.2019 [MMPC] ; ♂, Azerbaijan, Nakhichevan AR / Babek, 3 km NE Sirab / 39°18'N, 45°32'E 1250 m / 21.VI.2019 Proshchalykin, / Aliyev, Maharramov [ZISP] .

Diagnosis.

Acetabular carina far from reaching omaulus; subomaulus present, but reduced to elevation in form of inflection; POL:OOL = 1.45 at females and 1.84 at male; head, meso- and metasoma with very developed yellow coloration. From all Palaearctic species differs by present subomaulus (reduced to elevation in form of inflection) and very developed yellow coloration (the only species with yellow coloration on ventral part of mesosoma and predominantly yellow metasomal sterna). Morphological differences from all Palaearctic species given in key.

Description.

Female. Body length 9.6-11.4 mm (holotype 9.6 mm); fore wing length of holotype 7.3 mm. Head (Fig. 1C, D ). Head ratio H:W = 0.85; POL:OOL = 1.45; eyes slightly convergent downwards. Frons above antennal sockets without longitudinal elevation (carina). Occipital carina well developed; it does not reach hypostomal carina at distance slightly larger than diameter of anterior ocellus. Antennae elongate, all flagellomeres distinctly longer than wide. Mandibles with internal blunt tooth in apical third. Punctation above antennal sockets and temples sparse; along inner edges of eyes and at vertex dense, interspaces less than punctures diameter; clypeus in central part with several large punctures. Mesosoma. Acetabular carina acute, far from reaching omaulus, laterally connects to subomaulus reduced to elevation in form of inflection; omaulus-sternaulus acute, uniform, not curved. Metapostnotum well separated, with shallow medial furrow with transverse ribs and lateral folds diverging to posteriorly. Propodeal slope with strong median keel and distinct transverse carinae. Punctation on pronotal collar sparse; on mesonotum and scutellum irregular, deep, with micropuntured interspaces; mesopleuron with dense punctation, more sparse ventrally and posterolaterally; dorsolateral parts of propodeum with irregular dense punctation. Wings (Fig. 1E ). Venation typical for genus; hindwing media diverging at cu-a. Legs. Foretarsal rake well developed, basitarsus with three rake setae before apex; setae slightly spatulate. Metasoma. T1 not elongate, approximately as long as width. Pygidial plate broad, sharply edged, with elongated punctures forming irregular longitudinal wrinkles. Punctation of T1 irregular, interspaces much larger than punctures diameter; T2-T4 with smaller punctures, interspaces about punctures diameter; T5 with obscure punctato-wrinkled sculpture; S2-S5 scattered punctured, punctures on S2 large. Coloration (Fig. 1A ). Predominantly yellow with black pattern. Black or brown are: apical third of mandibles, upper part of frons and vertex between eyes, back part of head, stipes, prementum; pronotum (except collar and lobes), median and posterior parts of mesonotum, anteroventral and posterolateral parts of mesopleuron, metapleuron and propodeum (except large lateral spots); arolia; decreasing from metasomal base to top, basal bands on T1-T4 (at holotype on T5 also); S1 basally, S2 anterolateral spots and narrow anterior band (interrupted at holotype), S3 anterior band and T6 entire. Upper of scape, pedicel and antenna, basal dorsal spots or stripes on fore- and midfemora, longitudinal stripe on hind femur and tibia, apex of hind tarsomeres, are brownish. Forewing with darkened area on radial cell, apex of submarginal cell I, submarginal cell II and anterior part of submarginal cell III; isolated small darkening at apex of median cell. Setation ill developed; head along inner edges of eyes and lateral parts of clypeus with dense silvery pubescence. Stout setae on clypeus, labrum and mandibles.

Male. Body length 8.6 mm. Head (Figs 2C-D ). Head ratio H:W = 0.79; POL:OOL = 1.84; eyes distinctly convergent downwards. Frons above antennal sockets without longitudinal elevation (carina). Occipital carina well developed; it does not reach hypostomal carina at distance distinctly larger than diameter of anterior ocellus. Hypostomal carina opposite end of occipital carina with very gentle lamellar elevation. Clypeal lateral brush present, thin, consists of one-two bristles. Mandibles with internal blunt tooth in apical third. Punctation above antennal sockets and temples sparse; along inner edges of eyes and at vertex dense, interspaces less than punctures diameter; clypeus in central part with several large punctures. Antennal tyloids on F1-F3 linear; F4-F5 prominent, keel-like; F6-F7 short and wide; F8-F9 long and wide, F10-F11 lacking. Mesosoma (Fig. 2B ) and wings as at female. Legs. Foretarsal rake poorly developed, tarsal rake spines present only on basi- and second tarsomeres. Basal midtarsomeres symmetrical, not modified; apicoposterior spine on hind tarsomeres 1-4 distinctly longer than apicoanterior spine. Metasoma. Seven normally visible terga. T1 gibbous, with distinct constriction at border T1 and T2 (Fig. 2A ). Coloration (Fig. 2A ). Similar to female, but yellow coloration less developed. Head predominantly black (except wide stripes at inner edges of eyes, lower part of frons, clypeus and labrum); mesosoma ventrally with black pattern; decreasing from metasomal base to top, basal bands on T1-T5; S1 basally, S2 anterolateral large spots, S3 anterior band, S6 and T7 entire black. Setation similar to female, but micropubescence little more developed.

Etymology.

Species name derivate from adjective Latin word “flavescent” - becoming yellow, and characterizes a well-developed yellow coloration.

Distribution.

Azerbaijan (Nakhichevan).

Figures

Figure 1. Hoplisoides flavescens Mokrousov, sp. nov., holotype, female: A habitus, dorsolateral view B labels C head, frontal view D head, dorsal view E wings, dorsal view.

Figure 2. Hoplisoides flavescens Mokrousov, sp. nov., male, paratype: A habitus, lateral view B metasoma, ventral view C head, frontal view D head, dorsal view E scutellum, metanotum and propodeum, posterolateral view F antenna, dorsal view.