Pseudognaptodon curvinervis 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 : 478-481

Pseudognaptodon curvinervis van Achterberg , sp. n.

Figs 12–23

Type material. Holotype, ♂ ( RMNH), “S. Vietnam: Lam Dong, Bidoup Nuiba N.P., n[ea]r Da Lat , 1065–1700 m, Mal[aise] trap[s] 1–12, 11–19.x.2005, C. v. Achterberg & R. de Vries, RMNH’05”.

Diagnosis. Antenna of ♂ with approx. 18 antennomeres; basal area of second tergite smooth, transverse, oblique and 0.10 × as long as combined second and third tergites ( Fig. 16 ); vein SR1 of fore wing evenly curved ( Fig. 14 ); eye in dorsal view approx. 2.2 × as long as temple, temple roundly narrowed posteriorly ( Fig. 20 ); vein 1-R1 1.5 × as long as pterostigma; vein 1-SR of fore wing longer than wide; first and second metasomal tergites brownish yellow and largely longitudinally rugose (except basal area); second metasomal suture distinctly crenulate; first tergite widened posteriorly, its length about equal to its apical width ( Fig. 16 ); scutellar sulcus finely crenulate ( Fig. 16 ); vertex smooth and frons granulate ( Fig. 20 ).

Description. Holotype, ♂, length of fore wing 1.3 mm, and of body 1.6 mm.

Head. Antenna with 18 antennomeres, scapus longer dorsally than ventrally, length of third antennomere 1.2 × fourth antennomere, third, fourth and penultimate antennomeres 3.4, 2.9 and 2.5 × as long as wide, respectively ( Figs 22, 23 ); maxillary and labial palpi with 6 and 3 segments, respectively; length of maxillary palp 0.8 × height of head; temple smooth and hypostomal flange narrow ( Fig. 21 ); eye 2.2 × as long as temple in dorsal view; temples roundly narrowed behind eyes ( Fig. 20 ); OOL:diameter of posterior ocellus:POL = 14:7:8; vertex smooth, remotely setose and shiny; frons granulate, glabrous and shiny, without median groove; face smooth, shiny and evenly convex ( Fig. 19 ); clypeus truncate ventro-medially, flattened, and ventral rim thin, remainder convex and smooth; hypoclypeal depression 0.5 × as wide as face and deep; malar suture absent; length of malar space 1.7 × basal width of mandible; mandible flattened medially and smooth, strongly narrowed and twisted apically.

Mesosoma. Length of mesosoma 1.4 × its height; pronotum nearly vertical anteriorly and antescutal depression absent; side of pronotum smooth, including oblique groove ( Fig. 15 ); mesopleuron convex, shiny and smooth; precoxal sulcus absent; episternal scrobe present, linear ( Fig. 12 ); mesosternal suture moderately and smooth; notauli nearly complete (becoming posteriorly obsolescent), smooth and shallow, remaining separated posteriorly and in between no groove, but mesoscutum medio-anteriorly shallowly longitudinally impressed; mesoscutum strongly shiny, smooth, only antero-laterally and near notauli setose; scutellar sulcus finely crenulate ( Fig. 16 ); scutellum wide, slightly convex, smooth and shiny; metapleuron largely smooth; propodeum evenly convex, smooth and shiny ( Fig. 17 ).

Wings. Fore wing: pterostigma triangular ( Fig. 14 ); 1-M straight; 1-SR longer than wide; 1-SR+M reduced anteriorly; 1-R1 1.5 × longer than pterostigma; vein r emitted slightly behind middle of pterostigma and slender; r:3-SR+SR1:2-SR = 7:90:25; vein SR1 evenly curved ( Fig. 14 ); 2-M distinctly longer than 2-SR; m-cu antefurcal; 1-CU1 and cu-a widened, subequal; 1-CU1:2-CU1 = 1:7; CU1b slightly indicated basally; basal and subbasal cells of fore wing similarly setose as other cells. Hind wing: M+CU:1-M:1r-m = 10:16:5; all cells equally densely setose; m-cu not indicated; 2-SC+R somewhat widened apically ( Fig. 14 ).

Legs. Hind coxa smooth; hind femur with long setae ventrally; tarsal claws medium-sized and simple; length of femur, tibia and basitarsus of hind leg 3.8, 7.0 and 4.8 × as long as their maximum width; hind tibial spurs 0.30 and 0.35 × as long as basitarsus.

Metasoma. First tergite as long as its apical width, gradually widened apically, convex, largely irregularly longitudinally rugose, shiny, dorsope absent, its dorsal carinae coarsely developed basally and basally rather protruding, distinctly converging, nearly up to apex of tergite ( Fig. 16 ); first tergite laterally with indistinct laterope in finely crenulate glymma; second tergite (except basal area and apically) and basal half of third tergite longitudinally rugose (except smooth areas antero-laterally: Fig. 17 ); basal area of second tergite transverse, oblique, smooth and 0.10 × as long as combined second and third tergites; second metasomal suture distinctly crenulate; epipleura of 2 nd– 3 rd tergites semi-transparent ( Fig. 18 ); apical half of third and following tergites convex and smooth ( Fig. 17 ), except for transverse basal groove of fourth tergite; remainder of metasoma smooth.

Colour. Yellowish brown; palpi white; four basal antennal segments, tegulae, metasoma (but basal area of second tergite, third tergite, fourth tergite except apically dark brown) and legs (but telotarsi and hind basitarsus infuscated or dark brown) pale yellowish or brownish yellow; remainder of antenna blackish; mesoscutum anteriorly, scutellum posteriorly and metanotum rather dark brown ( Fig. 16 ); pterostigma and most veins of fore wing (except basally) brown; wing membrane subhyaline.]

Etymology. Named after one of its distinctive characters: the curved vein 3-SR+SR1 of the fore wing.

Distribution. Vietnam. Collected in open montane forest at 1065–1700 m.

Figures

FIGURES 12, 13. Pseudognaptodon curvinervis sp. n., ♂, holotype, 12 habitus, lateral aspect 13 male genitalia ventral aspect.

FIGURES 14–23. Pseudognaptodon curvinervis sp. n., ♂, holotype. 14 wings 15 mesosoma, lateral aspect 16 mesosoma, dorsal aspect 17 propodeum and metasoma, dorsal aspect 18 hind leg, lateral aspect 19 head, anterior aspect 20 head, dorsal aspect 21 head, lateral aspect 22 base of antenna 23 apex of antenna.