Utetes aharmus Tan & van Achterberg, 2018

Tan, Jiang-Li, Achterberg, Cornelis Van, Zhang, Ruo-Nan & Wu, Jia-Xuan, 2018, Five new species of Utetes Foerster (Hymenoptera, Braconidae, Opiinae) from NW China, Zootaxa 4402 (3), pp. 525-541 : 527-530

Utetes aharmus Tan & van Achterberg , sp. n.

( Figs 1–13 )

Type material. Holotype, ♀ ( NWUX) “NW China: Shaanxi, Qinling Mts., Guanghuojie, c. 100 m, 27.vi.2013, Jiangli Tan , NWUX”. Paratypes: 1 ♀ ( RMNH), “NW China: Shaanxi, Liping Nat. For. P., betw[een] Hongchenxia– Shicheng, c. 1490 m, 21.vi.2015, 32°47’N 106°40´E, JL Tan ” ; 1 ♀ ( NWUX) “NW China: Shaanxi, Pingheiliang, Ningshaan, N33.47° E108.50°, 17.viii.–1.x.2016, 2188 m, b[lack] Mal. trap, Tan JL & Tan QQ , NWUX”.

Comperative diagnosis. The new species runs in Tobias (1998) to Opius [= Utetes ] rotundiventris Thomson, 1895 ; but U. rotundiventris has the flat lateral areas of the first metasomal tergite narrow, tergite nearly parallel– sided, with longitudinal sculpture and 1.5–1.8 × as long as its apical width (flat lateral areas wide, tergite slightly widened apically, with irregular rugae and 1.3–1.4 × in U. aharmus ; Fig. 5 ), antennomeres of ♀ with short setae (with long setae; Figs 6–8 ), malar space about as long as basal width of mandible (0.5–0.7 ×), pronotal side anteromedially weakly crenulate (coarsely crenulate; Fig. 3 ), scutellum flat (somewhat to distinctly protruding above level of mesoscutum; Fig. 4 ), body length 2.0– 2.5 mm (2.9–4.0 mm) and hind femur about 5 × wider than long (4.2–4.5 ×; Fig. 11 ).

Description. Holotype, ♀, length of body 2.9 mm, of fore wing 3.4 mm.

Head. Antenna with 35 antennomeres and 1.3 × as long as fore wing, antennomeres with long setae; third antennomere 1.2 × as long as fourth antennomere, length of third, fourth and penultimate antennomeres 2.8, 2.1 and 1.9 × their width, respectively ( Figs 6–8 ); length of maxillary palp 1.1 × height of head; labial palp segments slender; occipital carina far separated from hypostomal carina and carina dorsally widely absent; hypostomal carina rather wide; length of eye in dorsal view 2.4 × temple ( Fig. 10 ); frons shallowly depressed behind scapus, smooth and glabrous; face finely and remotely punctate, 1.6 × wider than high medially, medially elevated ( Fig. 9 ) and connected to median elevation of frons; width of clypeus 2.7 × its maximum height and 0.6 × width of face; clypeus moderately convex, with some coarse punctures and with long ventral setae, slightly protruding and thin ventrally ( Fig. 9 ); hypoclypeal depression wide ( Fig. 9 ); malar suture present as obsolescent depression (in paratype distinctly impressed); length of malar space 0.5 × basal width of mandible and malar space weakly convex; mandible triangular, robust apically, basal half regularly widened and with medium–sized ventral carina ( Fig. 13 ).

Mesosoma. Length of mesosoma 1.3 × its height; dorsal pronope large, narrow elliptical ( Fig. 4 ); pronotal side antero-medially and posteriorly coarsely crenulate and remainder smooth; epicnemial area largely smooth; precoxal sulcus medium-sized and distinctly crenulate, remaining far from anterior and posterior margins of mesopleuron; remainder of mesopleuron convex, strongly shiny and smooth; pleural sulcus smooth; only ventral half of anterior groove of metapleuron crenulated ( Fig. 3 ); notauli absent on disc, only anteriorly deeply impressed and largely smooth (but rugose anteriorly) and no lateral carina in front of tegulae; mesoscutum rounded anteriorly (without “shoulders”), strongly shiny and largely glabrous ( Fig. 4 ); its medio-posterior depression deep, wide droplet–shaped; scutellar sulcus rather wide and finely crenulate; scutellum slightly protruding above level of mesoscutum medially, smooth and largely glabrous (but laterally setose) ( Fig. 4 ); propodeum with short medio– longitudinal carina connected to sinuate transverse carina and remainder rather coarsely rugose ( Figs 4, 5 ).

Wings. Fore wing ( Fig. 2 ): pterostigma triangular; 1-R1 ending at wing apex and 1.4 × as long as pterostigma; r:3-SR:SR1 = 5:32:62; 2-SR:3-SR:r–m = 23:32:11; r widened ; 1-M curved and 1-SR 0.4 × as long as 1-M; SR1 slightly curved; m-cu and cu-a weakly postfurcal; first subdiscal cell closed, CU1b long; apical 0.2 of M+CU1 sclerotized. Hind wing ( Fig. 2 ): M+CU:1–M:1r-m = 24:20:13; cu-a straight; m-cu completely absent.

Legs. Length of femur, tibia and basitarsus of hind leg 4.5, 8.5 and 4.6 × as long as wide, respectively; hind femur and tibia with long setae ( Fig. 11 ); carinula of hind tibia long and curved ( Fig. 12 ).

Metasoma. Length of first tergite 1.4 × its apical width, medially its surface distinctly convex and irregularly rugose, and with separate dorsal carinae, apical half slightly widened ( Fig. 5 ); second tergite smooth, with pair of wide triangular basal depressions; following tergites smooth; length of setose part of ovipositor sheath 0.05 × fore wing and 0.2 × hind tibia ( Fig. 11 ); ovipositor rather slender ( Figs 11, 12 ).

Colour. Body black; palpi ivory; legs (but hind tibia brownish apically), scapus and pedicellus ventrally, mandible (except dark brown teeth) and tegulae yellow; head anteriorly, orbita, second tergite and base of third tergite yellowish brown or yellow; metasoma (except first and second tergites) dark brown, but ventro–basally pale brown; wing membrane subhyaline; pterostigma and most veins brown.

Variation. Length of body 2.9–4.0 mm, of fore wing 3.4–4.2 mm; antennomeres of ♀ 32–33(1), 35(1) or 39(1), face 1.6–1.8 × wider than high medially; length of first tergite 1.3–1.4 × its apical width, length of setose part of ovipositor sheath 0.05–0.06 × fore wing and 0.2–0.3 × hind tibia; pronotal side posteriorly coarsely crenulate or crenulae reduced; length of malar space 0.5–0.7 × basal width of mandible and malar space with shallow impression or with distinct malar suture; hind femur 4.2–4.5 × wider than long; face (except orbita), second and third tergites yellowish brown or dark brown.

Distribution. China (Shaanxi).

Biology. Unknown.

Etymology. From “a” (Greek for “not”) and “harmos” (Greek for “shoulder”) because of lacking protruding shoulders.

Figures

FIGURE1. Utetes aharmus Tan & van Achterberg,sp. n., ♀, holotype, habitus, lateral aspect.

FIGURES 2–13. Utetes aharmus Tan & van Achterberg, sp. n., ♀, holotype. 2—wings. 3—mesosoma, lateral aspect. 4— mesosoma, dorsal aspect. 5—propodeum and first—third metasomal segments, dorsal aspect. 6—antenna. 7— basal antennomeresof antenna.8—apical antennomeresof antenna.9—head, anterior aspect.10—head, dorsal aspect.11—hind leg, lateral aspect.12—hind tibia, mesal aspect, arrow points to basal carinula.13—mandible, latero—ventral aspect.