Arthrolytus discoideus (Nees, 1834)

Doğanlar, Mikdat, 2018, World species of Arthrolytus (Hymenoptera Pteromalidae, Pteromalinae), with description of new species, Linzer biologische Beiträge 50 (1), pp. 255-289 : 273-274

Arthrolytus discoideus ( NEES, 1834) ( Figs 1f , 2g , 3h, i )

Arthrolytus (Arthrolytus) discoideus ( NEES, 1834), GRAHAM (1969: 795), new combination for Pteromalus discoideus NEES, 1834.

T y p e m a t e r i a l s: Holotype ♀, new species, Lectotype. ♀, HDOU, Germany, designated by GRAHAM (1969: 795).

M a t e r i a l e x a m i n e d: 1♀, England: London, Gladstonepark , 26.vii. 1981, Leg. M. Doğanlar ; 1♂, Turkey: Erzurum, 26.vi.1989, Leg. H. Özbek .

S y n o n y m s:givenbyGRAHAM (1969), NOYES (2017).

D i a g n o s i s: ♀: Head in dorsal view 2.0-2.1 times as broad as long; in frontal view 1.33x as broad as long; malar space 0.31x as long as eye height; POL 1.9 OOL. Antenna with ( Fig. 1f ) combined length of pedicel plus flagellum 1.81x as long as scape; usually slightly less than the breadth of the head; flagellum 1.9x length of scape; anelli plus F1 1.55x as long as pedicel; club 1.35x longer than F1 F1 1.83x as long as broad (20:14); F5-F6 distinctly transverse (12:17). Linear sensillae on F1 3, in 2 rows; F2-F6 4-5 in 2 rows, (3-2 apically, 1-2 basal half); C1-C2 6 in a row, C3 4 in a row. Forewing ( Fig. 3h ) with stigmal vein forming an acute angle (30 o) with the postmarginal vein; with black spot; submarginal vein 1.67x as long as marginal vein; marginal vein 1.3x stigmal vein; post marginal vein 1.43x stigmal vein. Antennae with combined length of pedicel and flagellum usually slightly less than breadth of head. Propodeum with panels of median area rather more coarsely reticulate, without transverse costula and median carina, lateral carina distinct basally. Body black, legs with coxae concolorous with body, femora, tibiae and tarsi yellow; Metasoma dark brown, basal tergite dark testaceous; Metasoma 1.7x as long as broad, at least very slightly longer than head plus mesosoma; 1.3x longer than mesosoma; 1.22x as wide as mesosoma. Body 2.75 mm. in length.

♂: Head in lateral view 1.8x as long as width; in anterior view 1.28x as wide as hight; in dorsal view 2.4x as wide as long, 1.15x wider than mesoscutum; in anterior view wide of frons 2.06x width of eye; lower margin of clypeus entire; POL 2x OOL; eye 1.38x as long as width; Malar space 0.36x eye length. Antenna ( Fig. 2g ) with scape 0.9x length as F1; pedicel 0.8x as long as wide and 0.2x as long as F1; flagellum 6.94x length of scape, F7 2.5-2.62x as long as wide; club 0.75x as long as F1; linear sensillae on F1 2; F2 3; F3 3; F4-F7 4, C1 3; C2 1. Scutellum 1.22x longer than broad. Forewing ( Fig. 3i ) with stigmal vein forming 40°angle to the postmarginal vein; costal cell 9.0-9.5 times as long as broad, without fuscous cloud; speculum bare or nearly so; postmarginal vein about 0.77x as long as the marginal vein, 1.11x as long as stigmal vein; marginal vein 1.44x as long as stigmal vein. Propodeum finely reticulate, without fovea basally; Length of median areae 0.35x length of scutellum; median carina, lateral carina and costula developed. Body black with bluish metallic reflection; legs with coxae concolorous with body, fore and mid femora in basal half, hind femora wholly fuscous, tibiae and tarsi yellow, Metasoma with a pale band on second tergit.

H o s t: unknown.

D i s t r i b u t i o n: Europe: Belgium ( VAGO 2006), Caucasus ( DZHANOKMEN 1978; MITROIU 2004), Czech Republic ( KALINA 1989; MITROIU 2004), Germany ( NEES 1834; GRAHAM 1969; VIDAL 2001; MITROIU 2004), Netherlands ( GIJSWIJT 2003), Romania ( MITROIU 2004; 2008), Slovenia ( BOUCEK 1977; MITROIU 2004), Spain ( GARRIDO TORRES & NIEVES ALDREY 1999; MITROIU 2004), Sweden ( THOMSON 1878; HANSSON 1991; GRAHAM 1969; HEDQVIST 2003; MITROIU 2004), Turkey ( ÖNCÜER 1991; MITROIU 2004), United Kingdom ( WALKER 1839; BOUCEK & GRAHAM 1978; GRAHAM 1969; MITROIU 2004).

Figures

Fig. 1: Arthrolytus spp. ♀♀ antennae: (a) A. oezbecki DOĞANLAR, 1978); (b) A. ocellus (WALKER, 1834) (GRAHAM, 1969); (c) A. nanus ASKEW & NIEVES ALDREY, 1982; (d) A. glandium BOUCEK, 1967 (BOUCEK & RASPLUS, 1991); (e) A. magarsosensis nov.sp.; (f) A. discoideus (NEES, 1834); (g) A. usubai KAMIJO, 1981; (h) A. yazicioglui nov.sp., (i) A. gurderei nov.sp., (j) A. slovacus GRAHAM, 1969; (k) A. kahvecii nov.sp., l-n. A. maculipennis (WALKER, 1835), (l) (BOUCEK & RASPLUS 1991), (m) (GAHAN 1933), (n) (GRAHAM 1969), (o) A. keltoni nov.sp.

Fig. 2: Arthrolytus spp., ♂♂ antennae, (a) A. oezbeki DOĞANLAR, 1978; (b) A. oswaldpecki nov.sp.; (c. A. ocellus (WALKER, 1834) (GRAHAM, 1969); (d) A. glandium BOUCEK, 1967 (BOUCEK & RASPLUS 1991); (e) A. nanus ASKEW & NIEVES ALDREY, 1982; (f) A. maculipennis (WALKER, 1835) (BOUCEK & RASPLUS 1991); (g) A. discoideus (NEES, 1834); (h) A. geyrazensis nov.sp.; (i) A. incisus ASKEW & NIEVES ALDREY, 1982; (j) A. nenehatunae nov.sp.; (k) A. usubai KAMIJO, 1981; (l) A. fasciatus (PROVENCER, 1881) (BOUCEK & HEYDON 1997); (m) A. nuridemiragi nov.sp.; (n) A. yazicioglui nov.sp.

Fig. 3. Arthrolytus spp. Forewings: (a) A. oezbeki DOĞANLAR, 1978; (b) A. oswaldpecki nov.sp.; (c, d) A. ocellus (WALKER, 1834) (c) from BOUCEK (1967); (d) from BOUCEK & RASPLUS (1991); (e. A. glandium BOUCEK (BOUCEK 1967); (f1) ♀ of A. nanus ASKEW & NIEVES ALDREY, 1982; (f2) ♂ of A. nanus; (g) A. magarsosensis nov.sp.; (h) ♀ of A. discoideus (NEES, 1834), (i). ♂ of A. discoideus; (j) A. usubai KAMIJO, 1981; (k) A. yazicioglui nov.sp., (l) A. gurderei nov.sp.; (m) A. kahvecii nov.sp.; (n) A. maculipennis (WALKER, 1835) (GAHAN, 1933); (o) A. keltoni nov.sp.; (p) A. geyrazensis nov.sp.; (q) A. incisus ASKEW & NIEVES ALDREY, 1982; (r) A. nenehatunae nov.sp.; (s) A. nuridemiragi nov.sp.