Bitomoides platyaulicis Sheng & Chen, 2019

Sheng, Ying-Yi, Wu, Qiong, Achterberg, Cornelis Van & Chen, Xue-Xin, 2019, Three newly recorded genera from China (Hymenoptera, Braconidae, Opiinae) with the notes on the genus Neopius and descriptions of three new species, Zootaxa 4604 (3), pp. 588-600 : 589-592

Bitomoides platyaulicis Sheng & Chen sp. n.

Figs 1–11

Type material. Holotype, ♀ ( ZJUH), “SE. China: Zhejiang, Tianmu Mt. , 2–4. VI.1992, Yonggen Lou, No. 900794” . Paratype, 1³ ( ZJUH), same data as holotype but No. 900608 .

Description. FEMALE. Holotype. Length. Body 3.4 mm, of fore wing 2.7 mm.

Head. Antennomeres 28, bristly setose and 1.1× as long as fore wing; third segment 1.1× as long as fourth segment, length of third, fourth and penultimate segments 2.8, 2.5 and 1.5× their width, respectively ( Fig. 10 ); length of maxillary palp 0.6× height of head ( Fig. 4a ); length of eye in dorsal view 4× temple ( Fig. 8 ); vertex punctate, with sparse setae and depressed near posterior ocelli; stemmaticum smooth; temple smooth and shiny, with sparse setae; OOL: diameter of ocellus: POL= 23:9:11; occipital carina absent dorsally, ventral part distinctly protruding dorsally and curved in middle level of eyes in lateral view; occipital carina far from hypostomal carina; hypostomal carina narrow ( Fig. 9 ); face punctate and sparsely setose, without distinct middle carina( Fig. 7 ); frons smooth behind antennal sockets; labrum glabrous and smooth, slightly depressed; clypeus transverse, flat, smooth and its ventral margin concave ( Fig. 7 ); width of clypeus 2.5× its maximum height and 0.5× width of face; hypoclypeal depression rather large and near triangular ( Fig. 7 ); mandible twisted, ventral carina nearly straight ventrally, gradually narrowed and with second teeth much smaller than first tooth ( Figs 2, 4a ); a shallow furrow present in malar space and slightly sculptured ventrally, malar space remarkably longer than basal width of mandible.

Mesosoma. Length of mesosoma 1.3× its height; dorsal pronope absent; pronotal side largely smooth, but slightly crenulate anteriorly and posteriorly ( Fig. 4a ); propleuron flattened and slightly punctate; epicnemial area largely smooth, slightly crenulate; precoxal sulcus medium-sized, impressed, moderately crenulate and elongated to anterior margin of mesopleuron ( Fig. 4a ); remainder of mesopleuron smooth and shiny, sparsely setose anterodorsally and postero-ventrally; pleural sulcus distinctly crenulate; mesosternum densely setose; mesosternal sulcus deep, medium-sized and crenulate; postpectal carina absent, but with circular carina at base of middle coxa distinct ( Fig. 4b ); anterior groove of metapleuron largely smooth except a few crenulate ventrally; posterior groove of metapleuron densely crenulate, remainder of metapleuron smooth and shiny; mesoscutum quite shiny, finely punctate and with evenly setae; antero-lateral margin of mesoscutum densely sculptured and depressed deeply postero-laterally; notauli depressed anteriorly and absent on disc; medio-posterior depression of mesoscutum small, elliptical and present in a shallow longitudinal impression; scutellar sulcus deep and enlarged medially, with a distinct medio- longitudinal carina and several parallel-sided crenulate; scutellum flattened and smooth, ( Figs 5, 6 ); lateral axillar lamella narrow; propodeum with a short medio-longitudinal carina and two oblique, transverse carinae, with several short longitudinal carinae posteriorly and remainder densely and coarsely reticulate-rugose ( Fig. 6 ).

Wings. Fore wing: 1-SR 0.4× longer than 1-M ( Fig. 2 ); pterostigma triangular; 1-R1 not reaching wing apex and 1.5× as long as pterostigma; r quite long and linear with 3-SR with obtuse angle; r-m not tubular; r:3-SR:SR1 = 10:25:67; 2-SR:3-SR:r-m = 27:25:9; 1-M curved and SR1 nearly straight; m-cu distinctly postfurcal and straight; cu-a strongly postfurcal, and 1-CU1 widened; 1-CU1:2-CU1 = 6:33; first subdiscal cell almost closed; CU1b obsolescent; M+CU1 sclerotized. Hind wing: 1-M of hind wing straight; M+CU:1-M:1r-m = 25:20:14; cu-a straight; SR absent ( Fig. 3 ).

Legs. Hind femur robust; length of femur, tibia and basitarsus of hind leg 2.7, 4.0 and 2.9× as long as width, respectively ( Fig. 11 ); femur moderately setose, tarsus and tibia densely setose.

Metasoma. Length of first tergite as long as its apical width, dorsal carinae strong basally and reaching half part of tergite, first tergite with a distinct medio-longitudinal carina medially, remainder coarsely and densely sculptured, dorsope absent; second tergite 1.6× as long as third tergite, longitudinally and rugosely striate, third tergite densely sculptured, second and third tergites bordered posteriorly by a relatively curved suture; remainder tergites retracted; setose part of ovipositor sheath 0.1× as long as fore wing, 0.9× first tergite and 0.7× hind tibia; hypopygium nearly 0.2× as long as metasoma, acute apically and not reaching apex of metasoma ( Fig. 11 ).

Colour. Dark brown; antenna (except pedicellus), face, clypeal, labrum, palpi, mandible (except apical teeth), legs yellowish; apical teeth of mandible, temple, pedicellus of antenna, remainder metasomal tergites, tarsal claw and ovipositor brown; wing membrane evenly slightly infuscate.

MALE. Length of fore wing 3.0 mm, of body 3.7 mm; antennomeres 30, length of femur, tibia and basitarsus of hind leg 2.9, 5.5 and 2.5× as long as width respectively; first subdiscal cell of fore wing open, CU1b unsclerotized; face of male pale yellowish.

Distribution. China (Oriental: Zhejiang).

Biology. Unknown.

Etymology. Name is derived from “platys” (Greek for “wide”) and “aulicis” (Greek for “furrow” or “groove”) because the scutellar sulcus is rather wide and enlarged medially.

Comments. The new species differs from Bitomoides latus Papp, 1999 and B. rugosus (Wesmael, 1838) by having the notauli only present anteriorly, medio-posterior depression of mesoscutum present (notauli largely impressed and medio-posterior depression of mesoscutum absent in Bitomoides latus and B. rugosus ), scutellar sulcus enlarged medially with two large crenulations (scutellar sulcus rather narrow), M+CU1 of fore wing sclerotized (largely unsclerotized), r of fore wing 0.4× as long as 3-SR (0.14 times) (characteristics of the fore wing refers to those used in van Achterberg (2004)).

Figures

FIGURE 1. Bitomoides platyaulicis Sheng & Chen, sp. n., ♀, holotype, habitus, lateral aspect.

FIGURES 2–11. Bitomoides platyaulici, Sheng & Chen, sp. n., ♀, holotype. 2—fore wing. 3—hind wing. 4a—mesosoma, lateral aspect. 4b—base of middle coxa. 5—mesosoma, dorsal aspect. 6—propodeum and first metasomal tergite, dorsal aspect. 7—antenna. 8—head, anterior aspect. 9—head, dorsal aspect. 10—head, lateral aspect. 11—hind leg and ovipositor, lateral aspect.