Aleiodes pallidistigmus (Telenga, 1941)

van Achterberg, Cornelis, Shaw, Mark R. & Quicke, Donald L. J., 2020, Revision of the western Palaearctic species of Aleiodes Wesmael (Hymenoptera, Braconidae, Rogadinae). Part 2: Revision of the A. apicalis group, ZooKeys 919, pp. 1-259 : 1

Aleiodes pallidistigmus (Telenga, 1941) Figs 558-559 , 560-572

Rhogas (Rhogas) pallidistigmus Telenga, 1941: xii, 143, 177 (but also as palidistigma (p. 409) and pallidistigma (p. 420)) [examined].

Rogas pallidistigmus ; Shenefelt 1975: 1241.

Aleiodes (Neorhogas) pallidistigmus ; Papp 1985b: 348.

Aleiodes (Chelonorhogas) pallidistigmus ; Chen and He 1997: 41; Fortier and Shaw 1999: 228; Belokobylskij 2000: 47; Ku et al. 2001: 237.

Aleiodes pallidistigma ; He et al., 2000: 667.

Rogas heterostigma Stelfox, 1953: 149; Shenefelt 1975: 1233 [examined]. Syn. nov.

Aleiodes (Neorhogas) heterostigma ; Papp 1985a: 143, 146-147, 153, 1991a: 95.

Aleiodes heterostigma ; O’Connor et al. 1999: 91; Papp 2005: 177.

Type material.

Paratypes of A. heterostigma , 4 ♀ + 1 ♂ (ZJUH, USNM), "[Ireland], Rye Water, Co. KD, 5/9.vii.[19]42, AWS[telfox]"; 1 ♀ (RMNH), id., but 5.vii.1942; 1 ♀ (NMI), id., but 8.vii.1948; 1 ♂ (NMI), "[Ireland], Woodbrook, OC, 26.vi.[19]38". Holotype of A. pallidistigmus (♀, ZISP) from Far East Russia (Primorsky Krai, Ussuri area, Vinogradovka, 10.viii.1929, Kiritshenko).

Additional material.

1 ♀ (RMNH), " Belgium: Liège, Mt. Rigi, 650 m, 2.viii.1986, at light, C. v. Achterberg, RMNH"; 1 ♀ (MTMA), "Dania [= Denmark]: S-Jutland, Kragelund Mose, near Baekke, 11.viii.1973, [T.] Munk"; 1 ♀ (NMS), " Wales: Cereigion, Rhôs Rhydd, SN572738, Molinia bog, 30.vii.1987, NCC Welsh Peatland Survey, P. Holmes, NMSZ 1996.023"; 1 ♂ (NMS) "Wales; Ceredigion, Comin Esgair Maen, SN652649, Equisetum bog, 23.vii.1987, NCC Welsh Peatland Survey, P. Holmes, NMSZ 1996.023"; 1 ♂ (FMNH), "Fennia [= Finland]: Helsinki, 27.vii.1978, O. Ranin"; 1 ♀ (NMS) Far East Russia, Anismovka v. Shkotova/S Primorje reg., 11-13.viii.2003, leg. Osipov"; 2 ♀ (MRC) "Far East Russia, S. Primorje reg., Lazo distr. Valentin 17-18.vii.2003 leg. Osipov": 1 ♀ (NMS) [Russian, Far East]; 2 ♀ (RMNH), " China: Jilin, Gomngzhuling, 43°5'N, 124°8'E, viii-ix.1983, Wang Chenghun".

Molecular data.

None.

Biology.

Unknown for West Palaearctic populations. Specimens have been collected in (June)July-August in open boggy areas, certainly at least sometimes over limestone. Presumably univoltine, but we have not seen reared material from West Palaearctic and the overwintering mode is unclear.

Diagnosis.

Maximum width of hypoclypeal depression 0.4-0.5 × minimum width of face (Fig. 568 ); OOL of ♀ approx. 1.3 × as long as diameter of posterior ocellus and densely granulate (Fig. 569 ); penultimate segments rather slender and antenna 1.5 × as long as fore wing; ventral margin of clypeus thick, not protruding in lateral view; mesoscutal lobes finely granulate-punctulate and matt; precoxal area coarsely rugose; marginal cell of fore wing of ♀ ending rather close to wing apex (Fig. 560 ); vein 1-CU1 of fore wing 0.4-0.5 × as long as vein 2-CU1 (Fig. 560 ); hind tarsal claws rather robust and only brownish setose (Fig. 571 ); 3rd tergite and basal half of 4th tergite coriaceous and dull; labial palp yellowish brown or brown; basal half of hind tibia reddish or yellowish, slightly paler than basal half of hind femur, and its apex reddish or yellowish; 4th and 5th tergites black.

Description.

Redescribed ♀ paratype of A. heterostigma (RMNH) from Ireland (Rye Water). Length of fore wing 4.9 mm, of body 6.3 mm.

Head. Antennal segments of ♀ 58, length of antenna 1.1 × fore wing, its subapical segments rather robust (Fig. 567 ); frons largely superficially granulate; OOL 1.8 × diameter of posterior ocellus, and superficially rugulose-granulate and shiny; vertex superficially rugulose-granulate, rather shiny; clypeus with some punctures; ventral margin of clypeus thick and not protruding forwards (Fig. 570 ); width of hypoclypeal depression 0.4 × minimum width of face (Fig. 568 ); length of eye 1.3 × temple in dorsal view (Fig. 569 ); vertex behind stemmaticum superficially granulate-rugulose; clypeus near lower level of eyes; length of malar space 0.4 × length of eye in lateral view.

Mesosoma. Mesoscutal lobes densely and finely punctate-granulate, matt; precoxal area of mesopleuron coarsely rugose medially; remainder of mesopleuron coarsely punctate, with some rugae near speculum and interspaces superficially granulate; scutellum rather flat, punctulate-granulate and with weak lateral carinae; propodeum rather convex, shiny and coarsely rugose, medio-longitudinal carina distinct only on its anterior half.

Wings. Fore wing: r 0.3 × 3-SR (Fig. 560 ); 1-CU1 horizontal, 0.45 × 2-CU1; r-m 0.7 × 3-SR; 2nd submarginal cell short (Fig. 560 ); cu-a inclivous, straight; 1-M slightly curved posteriorly; surroundings of M+CU1, 1-M and 1-CU1 setose. Hind wing: marginal cell gradually widened with basal half rather narrow (Fig. 561 ), its apical width 2.6 × width at level of hamuli; 2-SC+R short longitudinal; m-cu weakly developed; M+CU:1-M = 35:26; 1r-m 0.5 × 1-M.

Legs. Tarsal claws rather robust and only brownish setose (Fig. 572 ); hind coxa coarsely punctate, dorsally with oblique striae; hind trochantellus robust; length of hind femur and basitarsus 4.1 and 4.6 × their width, respectively; length of inner hind spur 0.5 × hind basitarsus.

Metasoma. First tergite rather flattened, as long as wide apically; 1st and 2nd tergites and base of 3rd tergite finely and irregularly longitudinally rugose, with medio-longitudinal carina weak; medio-basal area of 2nd tergite triangular and short (Fig. 564 ); 2nd suture rather deep and crenulate; apical half of 3rd tergite punctate-granulate, remainder of metasoma smooth except for some superficial micro-sculpture; 4th and apical half of 3rd tergite without sharp lateral crease; ovipositor sheath wide, with long setae and apically truncate (Fig. 559 ).

Colour. Black; telotarsi largely and basal quarter of antenna dark brown; palpi, tegulae and pterostigma pale yellow; remainder of legs, 1st and 2nd tergites, basal half of 3rd tergite largely and pronotum orange brown; veins brown; wing membrane subhyaline.

Variation. Pronotum anteriorly and basal half of antenna orange brown to dark brown, pterostigma is yellowish to largely (except base) rather dark brown; length of malar space 1.0-1.4 × basal width of mandible; OOL 0.7-1.8 × diameter of ocellus and metapleuron medially more or less punctate, rugulose-coriaceous or rugose. Antennal segments: ♀ 54(1), 58(1), 59(4), 60(2), 62(1), 64(1); ♂ 59(1), 60(1), 62(1). Apical tergites of ♂ type 1, fringe absent.

Distribution.

*Belgium, British Isles (Ireland, Wales), China, *Denmark, *Finland, Russia (Far East).

New synonymy.

We tried to separate the East Palaearctic A. pallidistigmus from the West Palaearctic A. heterostigma , but efforts were in vain. The differences such as the colour of the basal half of the antenna (dark brown in A. heterostigma and usually yellowish or brown in A. pallidistigmus ), the eyes and ocelli often smaller, OOL 1.1-1.8 × diameter of ocellus (0.7-1.4 ×), malar space 1.2-1.3 × basal width of mandible (1.0-1.4 ×) and metapleuron with a shiny and more or less punctate area (less shiny and rugulose-coriaceous or rugose) are too variable to justify separation of A. heterostigma . Therefore, we synonymise A. heterostigma with A. pallidistigmus (syn. nov.).

Figures

Figures 558, 559. Aleiodes pallidistigmus (Telenga), ♀, Denmark, Kragelund Mose 558 habitus lateral 559 ovipositor sheath lateral.

Figures 560 - 572. Aleiodes pallidistigmus (Telenga), ♀, Denmark, Kragelund Mose 560 fore wing 561 hind wing 562 mesosoma lateral 563 mesosoma dorsal 564 1 st- 3 rd metasomal tergites dorsal 565 fore femur lateral 566 hind femur lateral 567 apex of antenna 568 head anterior 569 head dorsal 570 head lateral 571 outer hind tarsal claw 572 base of antenna.