Acropimpla phongdienensis, Pham, Nhi Thi, Broad, Gavin R. & Wägele, Wolfgang J., 2011

Pham, Nhi Thi, Broad, Gavin R. & Wägele, Wolfgang J., 2011, The genus Acropimpla Townes (Hymenoptera: Ichneumonidae: Pimplinae) in Vietnam, with descriptions of three new species, Zootaxa 2921, pp. 1-12 : 9-12

Acropimpla phongdienensis sp. nov.

Diagnosis. Face yellow, yellow inner orbits extending beyond antennal sockets; propodeum with median longitudinal carinae distinct; clypeus, scutellum and metascutellum yellow; metasomal tergites reddish with apices of second to fifth tergites black; ovipositor 2.90x as long as hind tibia, with distinct constriction near tip.

Description (Holotype) ( Fig. 6 ). Body length 11.0 mm, fore wing 8.50 mm, ovipositor 7.50 mm. Head. Antenna with 22 flagellomeres, first flagellomere 1.32x length of second; diameter of lateral ocellus 0.84x ocellarocular distance; frons subpolished; face 0.83x as high as wide, slightly convex medially, with shallow, sparse and small punctures, pubescent, upper margin of face straight; clypeus with median apical notch, basally slightly convex, apex thin and emarginate; malar space about 0.33x basal width of mandible; upper tooth of mandible 1.30x longer than lower tooth; occipital carina complete, meeting hypostomal carina nearly at base of mandible

Mesosoma. Epomia present, about 0.70x basal width of mandible; pronotum polished; mesoscutum with dense, minute hairs, notauli shallowly present on anterior 0.40 of mesoscutum, nearly extending to line connecting middle of tegulae; scutellum weakly convex, apically smooth, without striations, lateral carinae absent; scutellum and metascutellum pubescent; mesopleuron subpolished on upper half and densely punctate on lower half, epicnemial carina strong and reaching anterior margin of mesopleuron, lateral sections of postpectal carina present to middle of mid coxa; metapleuron with lower half polished, upper half with some small punctures, pubescent, pleural carina complete; propodeum weakly convex, lateral and pleural areas with dense rugose punctures, pubescent, median longitudinal carinae present on basal 0.33, subparallel; propodeal spiracle rounded. Hind leg with femur 4.80x as long as wide, 0.80x length of tibia, basitarsus 0.40x tibia, 0.53x tarsus, 3.0x second tarsomere. Fore wing vein 2 rsm 0.50x length of 3 rs -m; cu-a opposite Rs+M; cell 1+2Rs nearly triangular, receiving vein 2 m-cu near apex; hind wing with first abscissa of vein Cu 1 about 2.20x length of vein cu-a; vein Cu 1 present.

Metasoma. Tergites densely punctate except for transverse smooth bands apically and concave area at base of first tergite; first tergite as long as apical width, dorsolateral carina present on apical 0.30, dorsal median carina extending to declivity; second tergite 0.80x as long as apically wide; 1.10x length of third tergite; ovipositor straight, 2.90x length of hind tibia, cylindrical and distinctly constricted near apex; tip of lower valves with oblique ridges.

Colour. Antenna blackish, except lower side of scape and pedicel yellow; face and clypeus yellow, yellow inner orbits extending beyond antennal sockets; head black; mesosoma with extensive red areas, pronotum red medially and yellow laterally, mesoscutum red, scutellum, metascutellum, and subtegular ridge yellow, mesopleuron black with oblique red band; fore and mid legs yellow, hind leg reddish; wings hyaline and yellowish, pterostigma and veins black, except costa yellowish; metasomal tergites reddish yellow except transverse smooth bands at apex of second to fifth tergites black; metasomal sternites whitish with two black spots on sternites 2–6 laterally, of which spots on sixth sternite largest, touching each other; ovipositor reddish, ovipositor sheath black and hairy.

Distribution. Currently known only from Phong Dien NR, Thua Thien-Hue, Central of Vietnam ( Fig. 7 )

Ecological note. Specimens were collected in lowland evergreen forest.

Comparisons. This new species is distinguished from its congeners by the distinct constriction near the tip of the ovipositor. The ground colour of the new species is similar to the colouration of A. punctata Baltazar and A. uchidai (Cushman) ( Gupta & Tikar 1976; Liu et al. 2010), but the clypeus and face are entirely yellow, without black/brown marks.

Etymology. We name the new species Acropimpla phongdienensis after the type locality.

Material examined. Holotype: Ƥ ( RMNH), Thua Thien-Hue, Phong Dien NR, 80–210 m a.s.l., 23.III– 06.IV.2001, Malaise trap, leg. leg. C. v. Achterberg & R. de Vries. Paratypes: 1Ƥ ( IEBR) same locality as holotype, 100 m a.s.l., 22.III–06.IV.2001, Malaise trap, leg. C. v. Achterberg & R. de Vries, Ich. 935.

Figures

FIGURE 6. Acropimpla phongdienensis sp. nov. holotype female: a. dorsal view; b. lateral view; c. lateral view of mesosoma; d. face; e. dorsal view of scutellum, metascutellum, and propodeum; f. fore wing; g. ovipositor.

FIGURE 7. Map showing the distributions of A. hapaliae (●), A. leucostoma (․), A. taishunensis (˔), and the type localities of A. lampei sp. nov (1), A. mucronis sp. nov (2), and A. phongdienensis sp. nov (3) in Vietnam.