Exallonyx pingbianensis Liu, He & Xu

Liu, Jingxian, He, Junhua & Xu, Zaifu, 2006, Two new species of Exallonyx Kieffer (Hymenoptera: Proctotrupidae) from China, with a key to the Chinese species, Zootaxa 1142, pp. 35-41 : 37-40

Exallonyx pingbianensis Liu, He & Xu , new species

( Figs. 7–11 )

Diagnosis of Male

Temple 0.83 as long as eye in dorsal view; the second and tenth flagellar segments each 3.4, 2.6 as long as wide; tyloids absent; abdominal petiole 2.0 as long as deep in lateral view, upper margin straight, distinctly contracted at base, with four weak transverse wrinkles at under side, its posterior half with four diagonal longitudinal ridges in lateral view.

Description of Male (holotype)

Front wing 2.3 mm long. Body black. Antenna black brown. Labrum, apical half of mandible and tegula reddish brown. Palpus pale brown. Fore leg light brown, except upper side of femur greyish yellow. Mid leg light brown, except coxa and trochanter black and upper side of femur grayish yellow. Hind leg black, except base and apex of femur redish brown. Wing hyaline, stigma and strong veins black brown, weak veins colorless. Temple 0.83× as long as eye in dorsal view. Gena 0.4× as long as long diameter of eye. Clypeus 2.5× as wide as long, weakly convex; its apex truncate with distinct transverse ridges on subapical declivity. Second flagellar segment 3.4× as long as wide. Tenth flagellar segment 2.6× as long as wide. Last segment of antenna 1.6× as long as penultimate segment. Tyloids absent. Area between antennal sockets with weak ridge. Occipital carina distinct. Pronotum with 4–5 transverse wrinkles on collar. Epomia strong. Pronotum smooth laterally, without setae behind epomia; setae present behind carina on collar. Upper margin of pronotum with single row of setae. Lower corner of pronotum with two pits. Front edge of mesopleuron with patch of setae at upper corner and another just above horizontal groove; bare area between these two patches 1.3× as long as tegula; speculum with sparse setae on upper 0.47. Lower half of mesopleuron mostly with sparse setae except for median area asetose; anterior portion and lower corner of horizontal groove with parallel fine wrinkles. Smooth area of metapleuron 0.55× as long as metapleuron and 0.8× as deep as metapleuron. Remainder of metapleuron with irregular fine wrinkles. Upper margin of propodeum arcuate in lateral view. Upper face of propodeum smooth with weak wrinkles on posterolateral margin. Median ridge incomplete and reaching to middle of posterior face. Posterior face of propodeum weakly rugose with strong transverse ridge medially. Lateral areas of propodeum with irregular reticulate wrinkles. Hind femur 4.5× as long as deep. Longer spur of hind tibia 0.6× as long as hind basitarsus. Stigma 2.0× as long as deep receiving radius nearly at middle. Anterior side of radial cell 0.5× as long as depth of stigma; posterodistal margin of stigma weakly convex. First radial vein oblique, 1.5× as long as wide. Second radial vein straight, meeting first radial vein with projection. Posterior margin of hind wing with shallow notch at basal 0.35. Abdominal petiole 1.5× as long as wide in dorsal view with five strong parallel longitudinal carinae and four longitudinal grooves. Abdominal petiole 2.0× as long as deep in lateral view; upper margin straight, contracted at base; anterior half with four weak transverse ridges, behind that with four strong diagonal longitudinal ridges. Base of syntergite with median groove reaching 0.8 to space between thyridia, each side with one short lateral groove, 0.3× as long as median groove. First thyridium 2.0× as wide as long, separated from each by 0.35 width of one thyridium. Setae on syntergite short and sparse, far from lower margin. Paramere triangular, not decurved, sharp at tip.

Female. Unknown.

Type material

Holotype, male, China, Yunnan Province: Pingbian County (22.58°N, 103.41°E), Dawei Mountain, 18.VII.2003, coll. Tingjing LI, No.20045268.

Dirtibution

China (Yunnan Province).

Etymology

The specific epithet is derived from the Latin adjective pingbianensis (inhabiting Pingbian), in reference to the collecting locality.

Remarks

This new species is very similar to E. strictus sp. nov., because both have the abdominal petiole contracted basally, and due to the strong transverse ridge at middle of posterior face of propodeum. These two features are unique to these two new species of Exallonyx . Exallonyx pingbianensis differs from E. strictus by having the second flagellar segment 3.4× as long as wide, the tenth flagellar segment 2.6× as long as wide, the abdominal petiole 1.5× as long as wide in the dorsal view, but 2.0× as long as deep in lateral view, and with four diagonal longitudinal ridges on its posterior half in lateral view.

Figures

FIGURES 1 – 11. 1 – 6. Exallonyx strictus, new species; 1. antenna; 2. fore wing; 3. thorax in lateral view; 4. hind leg; 5. abdominal petiole in dorsal view; and 6. abdominal petiole in lateral view. 7 – 11. Exallonyx pingbianensis, new species; 7. antenna; 8. fore wing; 9. thorax in lateral view; 10. abdominal petiole in dorsal view; and 11. abdominal petiole in lateral view.