Pantolyta elegans, Chemyreva & Kolyada, 2019

Chemyreva, V. G. & Kolyada, V. A., 2019, Review of the Pantolyta genus (Hymenoptera: Diapriidae: Pantolytini) from Russia, with description of a new species, Zoosystematica Rossica (China) 28 (1), pp. 163-176 : 165-171

Pantolyta elegans sp. nov.

( Figs 10–21)

Holotype. Female, Japan, Hokkaido, Sapporo , 5–10

August 1989 (M. Sharkey leg.) (NMPC).

Paratype. Russia: Sakhalin Prov., Kunashir I., vicinity of Grozovoe, Cape Ivanovskiy , 8–15 August 2008 (Melnik leg.), 2 males ( ZIN) .

Description. Female ( Figs 19–21). Body length 2.3 mm; fore wing length 2.0 mm; antennae length 1.5 mm.

Head black; A3–A14 and mesosoma dark brown; A1–A2, mandibles and metasoma brown; legs and palpi yellowish brown.

Head in dorsal view slightly wider than long (30: 22), wider than mesosoma (30: 26), bare, with a few scattered long setae. Antennal shelf moderately projecting; head not nasiform. Temples in dorsal view receding behind ( Figs 13, 19). Head in lateral view higher than long (30: 22). Eye large; its largest diameter longer than malar space (13: 8). Antennal shelf in frontal view with fine coriaceous sculpture below toruli. Face smooth, finely pubescent. Genae in frontal view slightly convex and converging towards mouthparts. Tentorial pits large. Mandibles bidentate ( Fig. 11).

Antennae slender ( Fig. 20). A3–A9 cylindrical; A10–A15 broadened in lateral view ( Fig. 21).

V.G. Chemyreva & V.A. Kolyada. Pantolyta genus from Russia

Ratios of length to width of A1–A 15 in dorsal view: A1 64: 9; A2 19: 8; A3 27: 8; A4 22: 8; A5 19: 8; A6 19: 8; A7 19: 8; A8 19: 8; A9 14: 8; A10 14: 10; A11 14: 11; A12 14: 11; A13 14: 11; A14 14: 12; A15 26: 13.

Mesosoma slightly compressed, higher than wide (32: 26), in dorsal view longer than wide (47: 26). Pronotum bare, with sharp and strongly prominent epomia and straight sharp keel between pronotal shoulders, and with a pair of deep pits on neck ( Fig. 13). Mesoscutum transverse (35: 29), convex, with a few scattered thin setae. Notauli complete throughout and distinct. Anterior scutellar pit deepened posteriorly, rounded, about as wide as long and slightly narrower than shortest distance between notauli. Scutellum large, widened posteriorly. Axillar depression scarcely pubescent, with verriculate tubercle ( Figs 13, 16, arrows). Mesopleuron scarcely pubescent, smooth, with oblique groove from anterovenral to posterodorsal margins; its anteroventral area deepened and pubescent. Metascutellum narrow, pubescent; dorsellum distinct, with three short longitudinal keels. Propodeum transverse (11: 6), entirely pubescent, with simple medial and one lateral keels. Posterior margin of propodeum slightly concave ( Figs 14, 16, 19). Forewing with completely closed radial cell; radial cell slightly shorter than marginal vein ( Fig. 18). Legs slender ( Fig. 19).

Metasoma. Petiole cylindrical, longer than wide (14: 10), with longitudinal keels, scattered pubescence and narrow strip of setae ventrally. T2 anteriorly with five deep grooves, narrower than petiole anteriorly and gradually widened posteriorly ( Fig. 19); T3–T6 narrow and bare; T7 and T8 long, strongly compressed laterally. S2 with numerous erect scattered setae; S3–S5 narrow with scattered setae; S6 distinctly elongated and compressed, with a few scattered setae.

Male. Paratype ( Figs 10–18). Body length 2.3 mm. Similar to female except for following characters. Antenna filiform. A1 stout, as long as half of head width; A3 not emarginated, with keel extending to third of A3 length ( Fig. 17). Ratios of length to width of A1–A 5 in lateral view: 14: 3.0; 4: 3.0; 13: 3.0; 13: 2.5; 14: 2.2. Petiole longer (17: 10). T3–T7 narrow and bare; T8 triangular. S2 with numerous erect scattered setae; S3–S7 narrow, with a few scattered setae; S8 subtriangular, rounded apically.

Differential diagnosis. Pantolyta elegans sp. nov. can be distinguished from all known Pantolyta species by the combination of following characters: radial cell completely closed (slightly shorter than length of marginal vein; Fig. 18); head as wide as high in frontal view ( Fig. 11) and distinctly transverse in dorsal view as well as not nasiform ( Fig. 13); epomia sharp and distinct, pronotal collar with sharp straight transversal keel ( Figs 13, 15); A1 without apical flange ( Figs 11, 20, 21); axillar depression with verriculate tubercle ( Figs 13, 16, arrows); anterior part of T2 and S2 narrower than petiole and gradually widened posteriorly ( Figs 14, 19); in female, antennae slender and weakly clavate ( Figs 20, 21); in male, antennae long and filiform ( Fig. 12), with A3 not emarginated and with keel extending to third of A3 length ( Fig. 17).

Distribution. Russia: Far East (Kunashir); Japan: Hokkaido.

Etymology. The species name is the Latin word “elegans ” (charming, graceful).

Pantolyta hadrosoma Macek, 1993

( Figs 22–28)

Pantolyta hadrosoma Macek, 1993: 48 .

Material examined. Greece: Thessaloniki Prov., Larissas, slopes NE – Mt. Kissavos ( Ossa ), SW– Stomio (250 m), 13 April 2006 (S. Vit leg.), 1 female ( NMPC) . Lithuania: vicinity of Vilnius, 17 June 1971 ( V. Tobias leg.), 2 females, 3 males . Estonia: Kannapeeksi , 58.9865°N, 22.652°E, YPT , 20 June 2016 ( V. Soon leg.), 1 female ( NHMT); Uhmardu, 58.6151°N, 26.7807°E, YPT , 7 July 2017 ( V. Soon rosoma (22–28) and P. marginalis (29). 22, female, face;

23, female, antenna, lateral view; 24, venation ( LRC –

length of radial cell, LMV –

length of marginal vein);

25, mesosoma, anterodorsal view; 26, mesosoma, dorsal view; 27, male, antenna,

proximal part; 28, 29, male,

antenna, distal part. Scale bar: 200 µm. leg.), 1 male ( NHMT). Russia: Murmansk Prov., Khibiny Station , 9 August 1928 (Cheburova leg.), 1 male ; Moscow, Bitsa Park , 23 June 1993 ( V. Kolyada leg.), 1 male ; Kirov Prov., Bolsheromanovo , 3–12 August 1994 ( V. Kolyada leg.), 2 females, 5 males ; Altay Republic, vicinity of Tigirek , 5 July 2005 (A. Reshchikov leg.), 1 female, 1 male ; Khabarovsk Terr., Udyl’ Lake , 29–31 August 1970 (D. Kasparyan leg.), 2 females, 5 males ; Sakhalin Prov., Shakhalin I., Aniva Distr. , 9 September 1991 (Basarukina leg.), 1 female ; Kunashir I., vicinity of Grozovoe, Cape Ivanovskiy , 8–15 August 2008 (Melnik leg.), 2 females . Georgia: Bakuriani , 13 July 1958 (Lyao Din-Si leg.), 1 female .

Differential diagnosis. Macropterous species with radial cell closed. Antennal shelf distinctly prominent; head nasiform; genae in frontal view convex ( Fig. 22). Pronotal collar sculptured; pronotal shoulders angular; epomia present ( Figs 25, 26). Axillar depression without verriculate tubercle. A1 distinctly longer than half of head width, without apical flanges ( Figs 23, 27). Female antennae robust, with apical segments slightly transverse in dorsal view ( Fig. 23). Male antennae also robust, with A13 2.0–2.7 times as long as wide ( Fig. 28).

Variation. Female yellowish brown to brown; body length 2.1–2.6 mm; A4–A9 cylindrical, elongate to subquadrate; A10–A14 cylindrical, subquadrate to moderately transverse; radial cell 0.89–1.25 times as long as marginal vein; pronotal collar with keel sometimes interrupted medially; petiole slightly transverse to quadrate, with posterior margin deeply or weakly concave. Male yellowish brown to dark brown; body length 1.5– 2.2 mm; A4–A13 more or less slender, 2.25–3.67 times as long as wide; petiole subquadrate to 1.1 times as long as wide, with posterior margin in dorsal view slightly concave to straight.

Distribution. Germany, Sweden, * Greece, Czech Republic, Hungary, Poland ( Macek, 1993), * Lithuania, * Estonia, * Russia (European Part, Far East), * Georgia.

Pantolyta marginalis ( Kieffer, 1909)

( Figs 29–35)

Acropiesta marginalis Kieffer, 1909: 586 .

Material examined. Estonia: Paluküla 58.2571°N, 26.9326˚E, YPT, 15 June 2017 ( V. Soon leg.), 1 male ( NHMT) . Russia: Crimea, Bakhchisaray Distr. , 1 km S of Sel’bukhra Mt., 14 June 1995 ( V. Kolyada leg.), 2 males ; Novgorod Prov., Spasskoe, Vetluga River , 7 August 1929 (S. Pokrovskiy leg.), 1 female ; Samara Prov., Kinel’ Distr., vicinity of Krasnaya-Samarka , 28 June and 3 July 2009 ( V. Chemyreva leg.), 11 females, 2 males ; Jewish Autonomous Region, Malyy Khingan Mts., Dichun River , 8–14 July 1979 ( V. Alekseev leg.), 4 females ; Primorskiy Terr., Partizansk Distr., Molchanovka , 18 June – 1 July 1972 (M. Kozlov leg.), 1 female . Moldova: Ungen Distr., Korneshty , 20 June 1975 (S. Kononova leg.), 1 female . Japan: Honshu, Iwate Pref., Iwaizumi, Hitsutori , 800 m, 11–17 August 1991 (Smetana leg.), 1 female, 5 males ( NMPC).

Differential diagnosis. Macropterous species with radial cell closed. Radial cell 0.43–0.81 times as long as marginal vein. Genae in frontal view convergent ( Fig. 30). Sculpture of pronotal collar and pronotal shoulders variable. Axillar depression without verriculate tubercle. A 1 in both sexes distinctly longer than half of head width, without apical flange ( Figs 30–32). Male antennae slender; A13 3.3–3.7 times as long as wide ( Fig. 29). Female antennae very variable.

Variation. Body length 1.5–2.2 mm. Stigmal and postmarginal veins convergent at acute or right angle. Petiole with posterior margin slightly concave to straight. Sculpture of pronotum very variable: keel medially absent to distinctly present, epomia sharp to obsolete. Basal striation of T 2 fine oni. 36, female, face; 37,

female, antenna; 38, mesosoma, dorsal view; 39, mesosoma, anterodorsal view; 40,

venation; 41, male, A1. Scale bar: 200 µm.

to strong. Female petiole as long as wide to slightly elongate. Female A4–A14 very variable in proportions: A4–A9 elongate and cylindrical to as long as wide and subglobular; A10 subquadrate to weakly transverse; A11–A14 distinctly to slightly transverse. Male antennae yellow to brown; propodeum with plicae weakly to distinctly produced posteriorly; petiole 1.3–1.4 times as long as wide.

Distribution. Germany, Sweden, Czech Republic, Poland ( Macek, 1993), * Estonia, * Moldova, * Russia (European Part, Far East), Japan.