Zaglyptogastra vietnamica Long

Long, Khuat Dang & Mai, Pham Quynh, 2015, A new species of Zaglyptogastra Ashmead, 1900 (Hymenoptera: Braconidae: Braconinae) from Vietnam, Zootaxa 4032 (3), pp. 322-326 : 323-325

Zaglyptogastra vietnamica Long , sp. n.

( Figs 1–13)

Description. Female. body length 17.3 mm, fore wing length 16.5 mm ( Fig. 1).

Head. Antennae incomplete, probably missing apical segment, with 101 segments remaining; third antennal segment 1.5 × fourth; width of face 1.4 × length of face and clypeus combined; malar space 0.9 × as long as mandible width; mandible width as long as hypoclypeal depression; distance between tentorial pits 1.3 × distance between pits and eyes ( Fig. 3 ); second segment of maxillary palp widened apically, with long setae ( Fig. 5 ); in dorsal view, length of eye 1.3 × as long as temple; in lateral view, width of eye 1.14 × as long as temple; ocelli small, POL:OD:OOL=7:7:20; distance between front and hind ocelli 0.2 × as long as OOL ( Fig. 2 ); face with long sparse setae; clypeus with a transverse carina; frons slightly depressed laterally, smooth; vertex and temple smooth, sparsely setose.

Mesosoma. Length of mesosoma 1.7 × as long as high; notauli absent; mesoscutum flat posteriorly; scutellar sulcus narrow, smooth; mesopleuron convex, smooth; metapleuron sparsely punctate, setose; propodeal spiracle subelliptical, 2.3 × as long as wide; propodeum slightly depressed medially, sparsely setose medially but more densely setose laterally ( Fig. 6 )

Wings. Fore wing: pterostigma 3.8 × as long as wide; r:2-SR:3-SR:SR1= 9:21:51:78; vein r arising just anterior of middle of pterostigma; vein cu-a perpendicular, slightly postfurcal ( Fig. 11 ); second submarginal 2.7 × as long as its apical width. Hind wing: vein M+CU:1-M: 1r-m:SC+R1=18:80:32:21; vein 2-SC+R horizontal ( Fig. 10 ).

Legs. Length of hind femur:tibia:basitarsus:tarsus = 60:101:31; length of hind femur, tibia and basitarsus 3.15,10.1 and 5.16 × as long as their maximum width respectively; inner hind tibial spur 0.4 × as long as hind basitarsus; apex of hind tibia with long differentiated setae ventrally ( Fig. 13 ).

Metasoma. First tergite 1.4 × as long as apical width, with median united carina and lateral crenulated grooves ( Fig. 7 ); medial length of second tergite 1.2 × than third; second and third sutures wide, crenulate; second tergite largely striate; third and fourth tergites with dense divergent striae; fifth tergite smooth ( Fig. 8 ); ovipositor sheath with long setae ( Fig. 12 ); ovipositor deeply depressed and formed into four arch-like sections ( Fig. 9 ).

Colour. Scapus and antennae black; palpi yellow; head yellow, except frons medially, vertex, temple and stemmaticum black ( Fig. 2 ). Middle and lateral lobes of mesoscutum black; mesosternum black. Fore and middle legs yellow; hind leg black entirely. Fore wing vein yellow two third basally, black one third apically ( Fig. 11 ); pterostigma yellow entirely; basal two third of hind wing yellow ( Fig. 10 ), apical one third black. Metasomal tergites black, sternites white to ivory; ovipositor sheath black; ovipositor yellow, brownish yellow in arch-like sections ( Fig. 9 ).

Male. Unknown.

Biology. Unknown.

Material. Holotype, female ( VNMN), ‘Bracn.1293’, [NW Vietnam:] Son La, Phu Yen, mango orchard, N21°13’07.9” E104°32’39.7”, 350m, sweep net, 18.vi.2015, KD Long.

Distribution. Northwest Vietnam (Son La).

Remarks. Zaglyptogastra vietnamica sp. n. is more or less abberant as it differs from known Zaglyptogastra species by having a distinct mediobasal area ( Fig. 8 ).

The new species appears to be close to Z. aswada from Indonesia (Sumatra) in having the base of the hind wing evenly setose, with only a small glabrous area close to vein cu-a ( Fig. 10 ), and the setae of the ovipositor sheath long ( Fig. 12 ). It differs principally in colouration: frons medially, stemmaticum and vertex black ( Fig. 2 ); head (excluding frons, stemmaticum and vertex) yellow; middle and lateral lobes of mesoscutum and mesosternum black; fore and middle legs yellow; hind leg black entirely; metasomal tergites black, sternites white to ivory; ovipositor sheath black; ovipositor yellow, brownish yellow in arch-like sections ( Fig. 9 ).

Zaglyptogastra vietnamica sp. n. differs from Z. vitalisi from Laos, in having the fourth metasomal tergite striate, and the fifth tergite smooth (both tergites are rugose in vitalisi ); setae on ovipositor sheath long (short in vitalisi ); propodeum sparsely setose antero-medially (densely setose in vitalisi ). Zaglyptogastra vietnamica sp. n. differs from Z. aswada El-Heneidy & Quicke, 2007 , from Indonesia, in having a shorter pterostigma, 3.8 × longer than wide (4.2 × in aswada ); base of hind wing with a small glabrous area close to vein cu-a (larger and distal from vein cu-a in aswada ); ovipositor sheath hairs long (short in aswada ); frons and vertex black (yellow to rufous in aswada ).

Figures

FIGURES 2 – 13. Zaglyptogastra vietnamica sp. n. 2. Head dorsal, 3. Head anterior, 4. Scapus lateral, 5. Second-fourth maxillary palp, 6. Propodeum dorsal, 7. First tergite dorsal, 8. Second-fifth metasomal segments dorsal, 9. Lateral aspect of apical part of ovipositor, 10. Basal part of hind wing, 11. Apical part of fore wing, 12. Medial part of ovipositor sheath showing long setae, 13. Apex of hind tibia lateral.