Wroughtonia undulata, Long & Van Achterberg & Carpenter & Oanh, 2020

Long, Khuat Dang, Van Achterberg, Cornelis, Carpenter, James M. & Oanh, Nguyen Thi, 2020, Review of the genus Wroughtonia Cameron, 1899 (Hymenoptera, Braconidae, Helconinae), with the description of 12 new species from Vietnam, American Museum Novitates 2020 (3953), pp. 1-56 : 39-41

Wroughtonia undulata , sp. nov.

Figures 116–125

TYPE MATERIAL: Holotype, ♀, “Hel.065” ( IEBR), NC Vietnam: Ha Tinh, Huong Son , 18°22′N 106°13′E, 900 m, May 18, 1998, Malaise trap, AMNH, K. Long. Paratypes: 2♀, “Hel.077” ( AMNH), same place; “Hel.078” ( VNMN), same place, but May 18, 1998, AMNH, K. Long .

DISTRIBUTION: NC Vietnam: Ha Tinh (Huong Son).

BIOLOGY: Unknown.

DIAGNOSIS: Antenna with 34–35 segments, antennal segments 10–23 cream white; maxillary palp 1.6 × as long as head; in frontal view height of eye 2.2 × its transverse width; width of face 2.2 × length of face and clypeus combined; frontal protuberance lamelliform, lower than level of lateral carina of frons; in dorsal view width of head 1.6 × its median length; height of eye 1.45 × temple; in lateral view height of eye 1.3 × its transverse width; transverse width of eye 1.4 × temple; face coarsely rugose; lateral area between antennal sockets and eye margin with transverse rugosities; clypeus rugose-punctate, malar space coarsely rugose. Mesosoma 1.65 × longer than high; notauli wide, sparsely crenulate anteriorly, fused posteriorly with two parallel rugosities in large longitudinally rugose area close to scutellar sulcus; scutellar sulcus wide, 0.7 × as long as scutellum; propodeum with basal median carina and large areola; propodeal areola nearly smooth, coriaceous; lateral areas of propodeum with transverse rugosities. Length of forewing 2.4 × its maximum width; vein 3-SR short, 0.5 × vein r; vein 2-M 3.4 × 3-SR; hind wing broad, vein 1-M short, 0.3 × vein 1r-m; vein SR of hind wing sinuate; vein 2-SC+R transverse; hind wing with 4 hamuli. Foretarsus 1.3 × as long as foretibia; hind femur robust, with ventral serrations and stout tooth-shaped protuberance; length of hind femur (without protuberance and serrations) 3.2 × its maximum width; hind coxa sparsely punctate laterally; hind femur reticulate-rugulose laterally. First metasomal tergite 1.4 × longer than its apical width, with long dorsal carinae almost up to apex of tergite; first tergite largely smooth, somewhat coriaceous; median length of second tergite 0.7 × its apical width, and 1.1 × third tergite; second tergite smooth, with sparse large punctures apically.

NOTES: W. undulata , sp. nov., runs to W. pterolophiae ( Chou and Hsu, 1998) , from China (couplet 20a) in the key by Yan et al. (2017), but differs as follows: (1) first tergite largely smooth or coriaceous with sparse punctures (smooth to moderately foveolate-punctate in W. pterolophiae ); (2) hind tarsus whitish yellow (fourth and fifth tarsal hind segments brown, darker than third segment in W. pterolophiae ); and (3) vein SR of hind wing sinuate (vein SR of hind wing slightly curved in W. pterolophiae ).

DESCRIPTION: Holotype, ♀, body length 9.7 mm, forewing length 8.0 mm, ovipositor sheath 4.5 mm (fig. 116).

Head: Antenna with 35 segments; third antennal segment 1.1 × as long as fourth segment (18:16); in frontal view height of eye 2.2 × its transverse width (40:18); width of face 2.2 × length of face and clypeus combined (53:24); malar space as long as mandible width (15:15) and 0.4 × height of eye (15:40) (fig. 118); maxillary palp 1.6 × as long as head (51:31); tentorial pits distinct, distance between tentorial pits 0.9 × distance between pit and eye (17:19); frontal protuberance lamelliform, lower than level of lateral carina of frons; in dorsal view width of head 1.6 × its median length (87:54); height of eye 1.45 × as long as temple (29:20); ocelli rather large, POL:OD:OOL = 10:7:20; distance between front and hind ocelli 0.25 × OOL (5:20) (fig. 117); in lateral view height of eye 1.3 × its transverse width (39:29); transverse width of eye 1.2 × temple (29:24) (fig. 119); face coarsely rugose; lateral area between antennal sockets and eye margin with transverse rugosities; clypeus rugose-punctate, malar space coarsely rugose; frons smooth; vertex and temple almost smooth with scattered fine punctures.

Mesosoma: Mesosoma 1.65 × longer than high (48:29) (fig. 121); pronotal side coarsely rugose, densely punctate dorsally; mesopleuron smooth medially, punctate-reticulate ventrally; metapleuron areolate-rugulose; median lobe of mesoscutum sparsely punctate, reticulate-rugulose posteriorly; lateral lobes of mesoscutum almost smooth; notauli wide, sparsely crenulate anteriorly, fused posteriorly with two parallel rugosities in large longitudinally rugose area close to scutellar sulcus (fig. 120); scutellar sulcus wide, with 3 carinae, two lateral carinae sinuate, 0.7 × as long as scutellum (15:21); scutellum sparsely punctate; propodeum with mediobasal carina and large areola (fig. 123); areola smooth or coriaceous; lateral areas of propodeum with transverse rugosities.

Wings: Forewing: length of forewing 2.4 × its maximum width (120:49); pterostigma 3.4 × longer than wide (41:12); vein 3-SR short, 0.5 × vein r; r:2-SR:3-SR:SR1:r-m = 15:18:8:60:12; 1-CU1:cu-a:2-CU1 = 4:13:21; second submarginal cell trapezium-shaped, vein 2-M 3.4 × 3-SR (27:8); hind wing broad, vein 1-M short, 0.3 × vein 1r-m (3:10); vein 2-SC+R transverse (fig. 125); hind wing with 4 hamuli.

Legs: Foretarsus 1.3 × longer than foretibia (45:35); hind femur robust, with ventral serrations and stout tooth-shaped protuberance (fig. 122); length of hind femur (without protuberance or serrations), tibia, and basitarsus 3.2 (57:18), 9.9 (89:9), and 7.25 × (29:4) as long as their maximum width, respectively; hind coxa sparsely punctate laterally; hind femur reticulate-rugulose laterally; hind basitarsus 0.3 × as long as hind tibia (29:89), and 0.7 × as long as hind tarsal segments 2–5 (29:41); fourth hind tarsal segment 0.4 × as long as telotarsus (5:14).

Metasoma: Metasoma 0.7 × as long as head and mesosoma combined (45:63); first tergite 1.4 × longer than its apical width (55:40), with long dorsal carinae almost up to apex of tergite, converging apically (fig. 124); first tergite almost smooth or coriaceous (fig. 124); median length of second tergite 0.7 × its apical width (28:42), and 1.1 × third tergite (28:25); second tergite smooth, with sparse large punctures apically; third tergite smooth; ovipositor sheath 0.6 × as long as forewing (45:80).

Color: Body dark brown; scapus light brown; antenna brown, with 11th–23rd antennal segments cream white; palpi yellow; fore- and middle legs yellow, but tibia pale yellow, tarsus whitish yellow; hind coxa, trochanter, and trochantellus yellow; hind femur yellow basally and ventrally, brown dorsoapically; hind tibia yellow basally, infuscate medially, brown apically; hind tarsus whitish yellow; pterostigma and wing veins brown; wing membrane yellow; first metasomal tergite yellow; second and third tergites dark brown; remainder of metasoma light brown, ovipositor sheath brown.

Male: Unknown.

ETYMOLOGY: From undulatus (Latin for “wavy”), because of the sinuate vein SR of the hind wing.

VARIATION: Female paratypes: antenna with 34–35 segments and 10th–22nd segments cream white; body length 8.0– 8.5 mm; forewing 6.4–6.8 mm; ovipositor sheath 4.4–4.6 mm; hind wing with 3 hamuli.

Figures

FIG. 116. Wroughtonia undulata, sp. nov., habitus (holotype, female, lateral)

FIGS. 117–125. Wroughtonia undulata holotype, female. 117. Head, dorsal. 118. Head, frontal. 119. Head, lateral. 120. Mesoscutum. 121. Mesopleuron. 122. Hind femur, lateral. 123. Propodeum. 124. Metasoma. 125. Hind wing.