Acrodactyla phuthoensis Pham, Broad, Matsumoto & Böhme, 2012

Pham, Nhi Thi, Broad, Gavin R., Matsumoto, Rikio & Böhme, Wolfgang, 2012, First record of the genus Acrodactyla Haliday (Hymenoptera: Ichneumonidae: Pimplinae) from Vietnam, with descriptions of six new species, Zootaxa 3207, pp. 40-53 : 49-51

publication ID	https://doi.org/ 10.5281/zenodo.210988
DOI	https://doi.org/10.5281/zenodo.6171023
persistent identifier	https://treatment.plazi.org/id/8F5F87F4-FF82-187D-5CAC-FB66FD17F6D1
treatment provided by	Plazi
scientific name	Acrodactyla phuthoensis Pham, Broad, Matsumoto & Böhme
status	sp. nov.

Treatment

Acrodactyla phuthoensis Pham, Broad, Matsumoto & Böhme , sp. nov.

( Figs 1 View FIGURE 1 e, 2d, 3d, 4e, 5a, 6d, 7d)

Diagnosis. Mesoscutum reddish, polished, almost without hairs; metapleuron coarse, rugose-punctate; propodeum with lateromedian longitudinal and posterior transverse carinae strong; fore and mid femora normal, without median ventral tooth; first abscissa of hind wing vein Cu 1 about 1.3x vein cu-a, second abscissa of vein Cu 1 present but faint; ovipositor 0.9x hind tibia, up-curved at tip.

Description. (Holotype female). Body length 5 mm, fore wing 3.8 mm, ovipositor 1 mm. Head. Antenna with 26 flagellomeres, first flagellomere 1.5x length of second; diameter of lateral ocellus 1.3x ocellar-ocular distance; frons impunctate and polished; inner margins of eyes weakly concave above antennal sockets, parallel ventrally; face as high as wide, pubescent; clypeus convex, separated from face by weakly impressed clypeofacial suture, about 0.8x as high as wide, apical margin round; malar space equal to basal width of mandible; mandible upper tooth slightly longer than lower tooth; palpi formula 5:4; occipital carina complete, meeting hypostomal carina about 1.2x basal mandible width from base of mandible, forming narrow flange ventrally after meeting hypostomal carina.

Mesosoma . Pronotum and mesoscutum impunctate, polished; mesoscutum 1.3x as long as wide at anterior level of tegulae; scutellum strongly convex, pubescent, lateral carina present at base; mesopleuron densely setose except concave area near mesopleural suture bare and polished, epicnemial carina present on lower half of mesopleuron; metapleuron coarsely rugose, pubescent, submetapleural carina complete, forming small lobe anteriorly with some transverse ridges; propodeum moderately convex, dorsally bare, lateral longitudinal, lateromedian longitudinal and posterior transverse carinae present, short transverse striations attached to lateromedian longitudinal carina, pleural area rugose and pubescent. Legs unmodified, fore and mid femora without teeth ventrally; fore femur 4.6x longer than wide; hind leg with femur 4.3x as long as wide, length 0.75x tibia, tibia 9x as long as apical width; basitarsus 0.27x tibia, 0.33x tarsus, 1.5x second tarsomere, fifth tarsomere swollen, distinctly longer than third. Fore wing with vein Rs&M basad of cu-a, vein cu-a inclivous, 2 rs-m about half distance between 2 rs-m and 2 m-cu, vein Cu 1 a separated from 1 m-cu by 0.85x length of vein Cu 1 b; hind wing with vein M+Cu strongly curved, first abscissa of vein Cu 1 1.3x as long as vein cu-a, second abscissa of vein Cu 1 faintly present.

Metasoma. Tergites polished with scattered, short hairs; first tergite 2x as long as apical width, dorsolateral carina complete, median longitudinal carina extending over oblique groove; second tergite 0.7x length of first tergite, 0.9x as long as apical width, basal and apical oblique grooves deep, rhombic area convex; third tergite shorter than second, basal and apical oblique grooves moderately deep; first sternite ended before level of spiracle, round convex apically with weak curved ridges; ovipositor slightly up-curved at tip, length from tip of hypopygium 0.9x hind tibia length.

Colour. Black. Antenna black, except scape and pedicel yellow ventrally, mandible, palpi, tegula, subalar prominence, legs yellow, except hind tibia with subbasal and apical fuscous bands, hind tarsus with tarsomeres 1–3 black apically; mesosoma reddish brown, except centre of median lobe of mesoscutum to pronotum mediodorsally, narrow stripe on lateral lobe of mesoscutum and lower half of mesopleuron to mesosternum black; wings hyaline, pterostigma and veins brownish yellow; tergites brown to blackish brown; ovipositor brown.

Male. Unknown.

Comparison. This species belongs to the quadrisculpta group ( Townes & Townes 1960). It can be distinguished from A. lachryma sp. nov. by its fore and mid femora lacking a median tooth on the ventral face, fore wing with vein 2 rs-m about half the distance between 2 rs-m and 2 m-cu (versus 0.8x), hind wing with first abscissa of vein Cu 1 1.3x vein cu-a (versus 3.2x). The new species is similar to A. orientalis (Cushman) from Taiwan in its unmodified fore and mid femora without teeth ventrally and polished metasomal tergites. The new species differs from the latter by its reddish mesoscutum and scutellum, and its first sternite not extending to level of spiracle, with weak curved ridges (versus rugose and extending beyond level of spiracle).

Etymology. This species is named after the type locality.

Distribution. Currently known only from Thuong Cuu (near Xuan Son NP), Phu Tho Province, North Vietnam ( Fig. 8 View FIGURE 8 ).

Ecological notes. The single specimen was collected in secondary forest at an elevation of 350–400 m a.s.l.

Material examined. Holotype: Ƥ ( RMNH), Phu Tho, Thanh Son, Thuong Cuu, 20°59’N 105°8’E, 350–400 m a.s.l, 11–16.x.1999, Malaise trap, R. de Vries leg.