Mestocharella qingdaoensis, Li & Li, 2022

Li, Wen-Jian & Li, Cheng-De, 2022, A new species and three newly recorded species of Tetrastichinae (Hymenoptera, Eulophidae) from China, ZooKeys 1131, pp. 197-215 : 197

Mestocharella qingdaoensis sp. nov.

Figs 1-4

Type material.

Holotype, female [on card], China, Shandong Province, Qingdao City, Mount Xiao Zhu, 18-20.V.2014, Guo-Hao Zu, Si-Zhu Liu, by yellow pan trapping (deposited in NEFU). Paratypes,1 female [on slide], same data as holotype (deposited in NEFU).

Diagnosis.

Female. Body mainly brownish, head and posterior half of mesoscutum and axillae yellow; propodeum median carina not forked anteriorly; plicae distinct but not connected with median carina; forewing SMV with three dorsal setae, MV 6.9-7.3 × as long as STV. Mestocharella qingdaoensis belongs to the Mestocharella kumatai group ( Kamijo 1994) in that the pronotal collar is without transverse carina, and it is similar to M. kumatai Kamijo, 1994. However, it can be separated from M. kumatai by the following characteristics: head yellow (vs blackish); mid-lobe of mesoscutum without median line (vs vague); median carina of propodeum not forked anteriorly (vs always forked); plicae distinct but not connected with median carina (connected by anterior oblique carinae); forewing SMV with three dorsal setae (vs five).

Description.

Female. Body length 1.8-1.9 mm, mainly yellow (Figs 1 , 2 ). Head yellow, eyes deep reddish brown, ocellus yellowish white; antenna scape yellowish, pedicel and flagellum yellowish brown. Metasoma mainly brownish with posterior half of mesoscutum and axillae yellow; wings hyaline, venation yellowish brown; legs yellow, tarsomere IV of all legs dark brown. Mesosoma brownish with basal 1/3 yellowish brown.

Head in dorsal view, nearly as broad as mesosoma, 2.5-2.6 × (2.5 ×) as broad as long; vertex with setae shorter than OD, POL 1.3 × OOL, OOL 2. × OD. Face depressed slightly, without median line; torulus with lower edge above the ventral edge of eyes; eyes separated by 1.45 × their height. Malar sulcus present; malar space 0.6 × as long as eye height. Mouth cavity 1.4 × as wide as malar space; clypeus with anterior margin bidentate; mandible tridentate. Antenna (Fig. 3 ) scape 5 × as long as broad with shorter setae on dorsal and ventral side; two anelli, first anellus slightly transverse, second anellus lamellar; pedicel 2.2-2.3 × as long as broad, shorter than F1; F1-F4: 3.0 ×, 3.4 ×, 3.2 ×, 2.3 × as long as broad respectively; clava 3.2 × as long as broad, ca as broad as F3, bi-segmented; flagellum with long whorled setae.

Metasoma relatively long, 1.7-1.8 × (1.8 ×) as long as broad. Pronotum subconical, 3.15 × as broad as long, ~0.6 × as long as mid-lobe of mesoscutum; collar rounded anteriorly and without transverse carina. Mid-lobe of mesoscutum with extremely fine reticulation; without median line; 3 adnotaular setae in one row on each side. Scutellum ca. as long as broad; submedian grooves shallow but distinct enclosing a space ~2.9 × as long as broad, sublateral grooves distinct without weak costulae; anterior setae situated before middle distinctly. Dorsellum ~3 × as broad as long, with a weak median carina. Propodeum subpentagonal area broad, smooth, without reticulation, median carina distinct and thin, not forked anteriorly; plicae distinct but not connecting with median carina; spiracle small, circular; callus with 2 setae. Forewing (Fig. 4 ) 2.2 × as long as broad, SMV with 3 dorsal setae; costal cell shorter than MV, MV 6.9-7.3 × (7.3 ×) as long as STV with front edge 12-15 setae; STV short with a long uncus; speculum small, nearly closed posteriorly, subcubital line of setae not reaching to distal edge of speculum. Legs slender, spur of metatibia 0.5 × as long as length of metabasitarsus.

Gastral petiole long with several transverse weak carinae anteriorly and 3 or 4 longitudinal strong carinae. Gaster 1.2-1.4 × as long as broad, shorter than mesosoma; ovipositor 0.5 × as long as gaster and slightly exserted at apex of gaster, tip of hypopygium situated at basal 4/5 of gaster.

Male. Unknown.

Host.

Unknown.

Distribution.

China (Shandong).

Etymology.

The epithetic qingdao refers to the place where the species collected.

Figures

Figures 1 - 4. Mestocharella qingdaoensis sp. nov., holotype, female 1 habitus, dorsal view 2 habitus, lateral view. Scale bars: 500 μm 3 antenna, lateral view 4 fore and hind wings, dorsal view. Scale bars: 100 μm.