Tamdaona sculpturata van Achterberg, 2020

Tian, Xiao-Xia, Achterberg, Cornelis Van, Wu, Jia-Xuan & Tan, Jiang-Li, 2020, New Gnamptodontinae (Hymenoptera: Braconidae) from China and Vietnam, with two genera new for China and seven new species, Zootaxa 4778 (3), pp. 471-508 : 498-506

Tamdaona sculpturata van Achterberg , sp. n.

( Figs 100–110 )

Type material. Holotype, ♀ ( RMNH), “ S. Vietnam: Dong Nai, Cát Tiên, N.P., Bird trail, Mal [aise] trap[s] 30–35, c. 100 m, 15–20.v.2007, C. v. Achterberg & R. de Vries, RMNH’07” . Paratype: 1 ♂ ( RMNH), topotypic, but Ficus trail, 9–30.iv.2007, M.P. Quy & N. T. Manh .

Diagnosis. Antenna of ♀ with approx. 28 antennomeres ( Fig. 100 ); frons with medio-longitudinal depression ( Fig. 107 ); pronope large ( Fig. 103 ); notauli rather wide anteriorly ( Fig. 103 ); rim of mesoscutum brownish near tegulae; mesosoma ventrally and posteriorly black; propodeum gradually lowered posteriorly ( Fig. 102 ); vein 3-SR of fore wing about twice as long as vein r ( Fig. 101 ); vein 1-R1 slightly longer than pterostigma ( Fig. 101 ); basal area of second metasomal tergite transverse, circular and medially 0.10–0.15 × as long as wide anteriorly, entirely sculptured and hardly or not protruding medio-posteriorly ( Fig. 104 ); second metasomal suture widened medially; fourth and fifth metasomal tergites distinctly sculptured ( Figs 100 , 104 ); setose part of ovipositor sheath approx. 0.23 × as long as fore wing ( Figs 100 , 105 ).

Description. Holotype, ♀, length of fore wing 2.0 mm, and of body 2.4 mm.

Head. Antenna with 28 antennomeres, scapus longer dorsally than ventrally, length of third antennomere 1.1 × fourth antennomere, third, fourth and penultimate antennomeres 2.2, 2.0 and 1.4 × as long as wide, respectively ( Figs 106, 110 ); maxillary and labial palpi with 6 and 4 segments, respectively; length of maxillary palp 0.8 × height of head; temple smooth; hypostomal flange narrow; eye 2.3 × as long as temple in dorsal view; temples directly narrowed behind eyes ( Fig. 108 ); OOL:diameter of posterior ocellus:POL = 15:9:8; vertex largely smooth, distinctly setose and shiny; frons with median groove, medially largely smooth and shiny, but flat area near antennal sockets rugose and convex part behind it remotely punctate; face remotely punctate and superficially rugose, shiny and irregularly convex ( Fig. 107 ); clypeus truncate medially and ventral rim thin, moderately convex and smooth; hypoclypeal depression 0.4 × as wide as face, medium-sized and rather shallow; malar suture absent; length of malar space 1.5 × basal width of mandible; mandible rather flat medially and smooth, strongly narrowed and twisted apically.

Mesosoma. Length of mesosoma 1.7 × its height; pronotum anteriorly largely horizontal and with large slit-like pronope ( Fig. 103 ); side of pronotum smooth, but with carina and micro-crenulae anteriorly ( Fig. 102 ); mesopleuron convex, shiny and smooth; precoxal sulcus long and curved, medially with some crenulae; episternal scrobe long and linear; pleural sulcus finely crenulate; mesosternal suture deep, medium-sized and coarsely crenulate; mesosternum punctate; notauli complete but shallow posteriorly, finely crenulate anteriorly and smooth posteriorly, moderately wide ( Fig. 103 ); mesoscutum convex, strongly shiny, and superficially punctate or punctulate, entirely conspicuously setose and medio-posteriorly with longitudinal groove plus some striae between notauli; scutellar sulcus slightly narrowed laterally and with 5 medium-sized crenulae ( Fig. 103 ); scutellum wide, convex, conspicuously setose, largely punctate and shiny; metapleuron largely finely and densely reticulate-rugose; propodeum anteriorly convex and about as long as posterior part, moderately shiny and coarsely reticulate-rugose ( Fig. 104 ), posteriorly with pair of anteriorly converging carinae and anterior half with medio-longitudinal carina.

Wings. Fore wing: pterostigma wide triangular ( Fig. 101 ); second submarginal cell slightly narrowed anteriorly ( Fig. 101 ); 1-SR much longer than wide; 1-SR+M present anteriorly; 1-R1 1.1 × longer than pterostigma; vein r emitted just before middle of pterostigma and slender; r:3-SR:SR1:2-SR = 10:22:78:27; vein SR1 nearly straight; m-cu distinctly antefurcal; 1-CU1 widened, shorter than cu-a; 1-CU1:2-CU1 = 6:49; CU1b complete; basal and subbasal cells of fore wing similarly setose as other cells. Hind wing: M+CU:1-M:1r-m = 7:12:4; basal and subbasal cells less densely setose than other cells; m-cu distinctly indicated.

Legs. Hind coxa smooth; tarsal claws medium-sized and simple ( Fig. 105 ); length of femur, tibia and basitarsus of hind leg 3.6, 7.9 and 5.9 × as long as their maximum width; hind tibial spurs 0.30 and 0.35 × as long as basitarsus.

Metasoma. First tergite 0.8 × longer than its apical width, gradually widened apically, convex, coarsely reticulate rugose, shiny, dorsope absent, its dorsal carinae coarsely developed basally, strongly converging, posteriorly merging in sculpture ( Fig. 104 ); first tergite laterally with deep elliptical laterope in smooth glymma ( Fig. 100 ); second tergite and most of third tergite coarsely reticulate-rugose (including basal area), following tergites largely rugose but much less pronounced than on second tergite ( Fig. 104 ); basal area of second tergite transverse, narrow hemicircular and medially 0.14 × as long as combined second and third tergites; second metasomal suture and antero-lateral grooves of third tergite distinct and coarsely crenulate ( Fig. 104 ); epipleura of second and third tergites semi-transparent; ovipositor sheath subparallel-sided and apically pointed, its setose part 0.23 × as long as fore wing, 1.2 × first tergite and 1.6 × hind basitarsus; ovipositor moderately compressed and hardly widened subapically, with small subapical nodus ( Fig. 100 ).

Colour. Yellowish brown; palpi and metasoma ventrally (except apically) white; scapus largely, pedicellus ventrally, mouthparts, clypeus, tegulae and legs (but telotarsi dark brown) pale yellowish; remainder of antenna, stemmaticum, mesosternum, metanotum, propodeum, first tergite (except latero-posteriorly), second–fifth tergites (except laterally) dark brown; pterostigma (but pale brown apically) and most veins of fore wing (except basally) brown; wing membrane subhyaline.

Male. Paratype: length of fore wing 1.8 mm and of body 2.3 mm; antenna with 25 segments; very similar to holotype, but pronotum dorsally, mesoscutum partly, scutellum, sixth and seventh tergites dark brown or brown; mesosoma 1.5 × longer than high; vein 3-SR of fore wing twice as long as vein r.

Etymology. Named after its extensively sculptured metasoma.

Distribution. Oriental: Vietnam. Collected in lowland forest at 100 m.

Figures

FIGURE 100. Tamdaona sculpturata sp. n., ♀, holotype, habitus, lateral aspect.

FIGURES 101–110. Tamdaona sculpturata sp. n., ♀, holotype. 101 wings 102 mesosoma, lateral aspect 103 mesosoma, dorsal aspect 104 propodeum and metasoma, dorsal aspect 105 hind leg., lateral aspect 106 base of antenna 107 head, anterior aspect 108 head, dorsal aspect 109 head, lateral aspect 110 apex of antenna.