Stenomalina delvarei Lotfalizadeh & Rasplus, 2020

Lotfalizadeh, Hossein, Karimpour, Younes, Delvare, Gérard & Rasplus, Jean-Yves, 2020, Chalcidoidea (Hymenoptera) obtained from common reed, Phragmites australis (Cav.) Trin. ex Steud. (Poaceae) in Iran with new records and descriptions of two new species, European Journal of Taxonomy 710, pp. 1-35 : 23-26

Stenomalina delvarei Lotfalizadeh & Rasplus sp. nov.

urn:lsid:zoobank.org:act:6155E1F4-0120-4217-ACAD-F08E1EDC2729

Figs 15–16

Diagnosis

Clypeus medially pointed and with lateral teeth, dorsally finely strigose; malar space slightly more than half the length of an eye; pedicel + flagellum 0.9× as long as head width, elongate funicular segments (distinctly longer than wide); temple converging slightly behind the eye dorsally, slightly more than ⅓ as long as eyes; propodeum, with an inverted Y-shaped median carina; costal cell ventrally with three rows of short setae near dorsal margin; basal third of wing bare, postmarginal vein longer than marginal and stigma veins; metasoma lanceolate, short, 1.7× as long as broad, relatively shorter metasoma (shorter than head + mesosoma).

Etymology

We dedicate this species to our friend Gérard Delvare for his overall contribution to the taxonomy of Chalcidoidea .

Material examined

Holotype

IRAN • ♀; West-Azarbaijan Province , Urmia, Täzehkand-e Qäterchï; 37º39′ N, 44º58′ E; 1335 m a.s.l.; Apr. 2017; Y. Karimpour leg.; ex Phragmites australis ; HMIM.

Paratypes

IRAN – West-Azerbaijan Province • 1 ♀, 1 ♂; same collection data as for holotype; HMIM • 1 ♀; Urmia, Häshtïan ; 37º47′ N, 44º39′ E; 1680 m a.s.l.; Apr. 2017; Y. Karimpour leg.; ex Phragmites australis ; CBGP • 1 ♂; same collection data as for preceding; HMIM .

Description

Female (holotype)

BODY LENGTH. 3.85 mm.

COLOR. Head and mesosoma dark with metallic green reflection ( Fig. 15D ); metasoma dark dorsally, T1 with green, golden and violet reflections( Fig. 15D ); antennal scape, pedicel and anelli yellowishbrown, flagellum black ( Fig. 15B ); coxae concolorous with mesosoma, distally brown, trochanters yellow, femora brown, distally and basally yellow; tibiae and tarsi whitish-yellow, last tarsal segments brownish, pretarsi fuscous. Tegula brownish. Forewing slightly infuscate below marginal vein; rest of wing, and the hindwing hyaline; venation brown. Wing setae dark ( Fig. 15E ).

HEAD. Reticulate, with finer reticulation in scrobes and on lower face, clypeus dorsally finely striated, clypeal margin pointed medially with lateral teeth ( Fig. 16B ), striation reaching half way to level of toruli; head in dorsal view as wide as mesosoma ( Fig. 15D ), 2.2× as broad as long (112:50). Scrobes shallow, almost invisible in dorsal view. Temple relatively long, in dorsal view a little less than length of eye (23:28) ( Fig. 15D ). POL shorter than OOL (23:28) and 1.5× distance between anterior and posterior ocelli (23:15). Head in frontal view 1.32 × as broad as high (150:114) ( Fig. 16B ); malar space 0.63 × eye height (40:64). Eyes separated by 1.7× their height (102:58); eye height about 1.33 × length (64:48); anterior margin of clypeus slightly toothed medially ( Fig. 16B ); lower margins of toruli distinctly above level of lower margins of eyes ( Fig. 16B ). Antennal ( Fig. 15B ) formula: 11253; antennal scape 6.8× longer than wide (115:18), shorter than eye height (115:139), reaching to median ocellus, inserted approximately mid-way between the anterior margin of the clypeus and the median ocellus; pedicel plus flagellum 0.9× as long as head width (112:104); pedicel in dorsal view 1.75 × as long as broad (35:20) and 2.3 × as long as anelli (35:15); funicular segments all longer than broad, filiform, 1 st and 2 nd anelli transverse, F1 1.28 × longer than pedicel (45:35) and longer than each of F2–F5 funicular segments, relative measurements: F1 (45:22), F2 (43:22), F3 (37:22), F4 (37:22), F5 (28:22), F6 (28:22); clava about 3.6× as long as broad and longer than combined length of F5 and F6 (72:61); each funicular segment and 2 basal claval segments at least with 2 to 3 sparse rows of placoid sensilla.

MESOSOMA. Dorsally coarsely reticulate, with long white setae, mediodorsally with larger reticulation; in dorsal view 1.4 × as long as broad (200:140) ( Fig. 15D ), mesosomal length: 200, width: 140, height: 125. Pronotum 2.55 × as broad as long; mesoscutum slightly longer than broad (148:140); mesosoma 1.6× longer than high (200: 125). Notauli incomplete and not reaching posterior margin of mesoscutum, reaching about middle of mesoscutum, with finer reticulations on lateral lobes of mesoscutum. Scutellum slightly longer than wide (70:65), moderately convex, rounded posteriorly, slightly shorter than mesoscutum (55:58), frenulum distinct. Propodeum ( Fig. 16A, E ) 0.5× as long as scutellum (26:55), inclined, finely reticulate, with distinctly raised median carina, forking to an inverted Y-shape carina delimiting nucha, with distinct costula, base of propodeum submedially with two small depressions, enclosed with distinct carinae; spiracle oval and separated from metanotum by its lesser diameter.

FORE WING ( Fig. 2D ). Length 2.45 × its width (275:112); costal cell ventrally with three rows of short setae near dorsal margin; basal third of wing bare, basal cell bare and open below; speculum narrow and unconspicuous, open below; disc covered with short and dense pilosity. Relative measurements: costal cell: 105: M: 40; S: 30; PM: 45.

GASTER ( Fig. 15D ). Lanceolate, dorsally in some parts slightly reticulate, except for GT2-GT4 which is mainly smooth, 1.7× as long as broad (170:100), shorter than head plus mesosoma (170:204); hind margin of GT1 straight, GT1 is the larger tergite, ca 0.4 × metasoma length (GT1: 70); hind margins of GT2 and GT3 straight. Ovipositor sheaths short, concealed or only very slightly exerted in dorsal view (Fig. 52).

Male

Similar to female except for following: dody length 3.4 mm; head and mesosoma with golden reflections ( Fig. 16C ); F1–2 yellowish ventrally ( Fig. 16D ). Propodeum ( Fig. 16E ) with less raised carinae beside submedian depressions.

Variation

Body length of females based on available specimens varies from 3.85 to 4.07 mm.

Biological association

Host unknown. This species was reared from Phragmites australis in northwest Iran. Species of Chloropidae are its most likely host.

Distribution

Only known from Iran.

Remarks

The female is closely related to females of Stenomalina rossiliensis Graham, 1986 and S. liparae (Giraud, 1863) also reared from Phragmites australis , and may be separated by the following key:

Key to species of Stenomalina associated with Phragmites australis

1. Metasoma short, 1.7× as long as broad; antenna short, pedicel + flagellum 0.9× as long as head width ............................................................ Stenomalina delvarei Lotfalizadeh & Rasplus sp. nov.

– Metasoma long, more than 2.5 × as long as broad; antenna long, pedicel + flagellum distinctly longer than head width (more than 1.2 ×) .................................................................................................... 2

2. Funicular segments longer than wide (about 1.3–1.5×), excepted F6 quadrate or very slightly elongate ..................................................................................... Stenomalina liparae (Giraud, 1863)

– All funicular segments longer than wide (about 1.5-2.1×), F6 about 1.5× as long as wide .............. ............................................................................................. Stenomalina rossiliensis Graham, 1986

Stenomalina delvarei Lotfalizadeh & Rasplus sp. nov. shares the following characters with S. rossiliensis : elongate funicular segments (more than 1.3 × as long as wide) and the sculpture of the propodeum, with an inverted Y-shaped median carina. Considering some morphological characters mentioned by Graham & Claridge (1965), this species is similar to Stenomalina liparae and shares the following characters: malar space slightly more than ½ as long as eye; elongate funicular segments; temple converging slightly behind the eye dorsally, slightly more than ⅓ as long as eyes; lanceolate metasoma, relatively shorter metasoma (shorter than head + mesosoma).

Figures

Fig. 15. Stenomalina delvarei Lotfalizadeh & Rasplus sp. nov. A–C. Holotype, ♀ (HMIM). A. Lateral view. B. Antenna. C. Mesosoma in lateral view. D–E. Paratype, ♂ (HMIM). D. Dorsal view. E. Fore wing.

Fig. 16. Stenomalina delvarei Lotfalizadeh & Rasplus sp. nov. A–B. Holotype, ♀ (HMIM). A. Propodeum in dorsal view. B. Head and antennae in frontal view. C–E. Paratype, ♂ (HMIM). C. Dorsal view. D. Head and antenna in lateral view. E. Propodeum in dorsal view.

Fig. 2. Asitus sp. A. Male in lateral view. B. Head and mesosoma in dorsal view. C. Antenna of female.