Pseudonortonia lamellata, Selis & Nguyen, 2024

Selis, Marco & Nguyen, Lien Thi Phuong, 2024, The Oriental species of the genus Pseudonortonia Giordani Soika (Hymenoptera Vespidae: Eumeninae), Zootaxa 5477 (2), pp. 171-194 : 185-187

Pseudonortonia lamellata sp. nov.

( Fig. 9 )

Diagnosis. The female of this species can be distinguished from the other Oriental species of Pseudonortonia by the following combination of characters: clypeus with dense and strong punctures, interspaces between punctures smaller than puncture diameter, punctures in central part larger than those in other parts; occipital carina strongly developed and forming a distinct angle in lower half; pronotal carina fully developed, strongly raised; propodeal shelf shorter than metanotum; T1 1.1× as long as apically wide and densely punctate, interspaces forming reticulation; T2 and S2 strongly bulging preapically and bearing a long reflexed hyaline lamella, S2 evenly convex and distinctly longer than T2.

Material examined. HOLOTYPE: ♀ labeled “VIETNAM; Lao Cai, Van Ban, / Nam Xe , Hoang Lien-Van Ban NR, / B 22°2’47.9”, E 103°58’13”; 900 m / 23.iv.2021; NTP Lien, TT Ngat // Pseudonortonia lamellata / HOLOTYPE ♀ / Det. Nguyen T. P. Lien [red label]” ( IEBR) . PARATYPES. VIETNAM: same data as holotype, 4♀ ( IEBR) ; Cao Bang, Tra Linh, Thang Hen Lake , 22°45’33”N 106°17’46”E, 578 m, 4.VIII.2022, leg. Lien Thi Phuong Nguyen et al., 2♀ ( IEBR) ; Lang Son, Huu Lung, Huu Lien, Lan Nghe , Hu Lien NR, 21°33’48.6”N 106°24’36.4”E, 289 m, leg. Lien Thi Phuong Nguyen et al., 1♀ ( IEBR) .

Description. Female. Body length 7.3–8.4 mm (holotype 8.0 mm); fore wing length 7.0–8.0 mm (holotype 7.6 mm).

Head in frontal view about 1.1× as wide as high. Inner eye margins strongly converging below, interocular distance about 1.5× wider at vertex than at clypeus. Clypeus in frontal view wider than long, about 1.1× as wide as high; basal margin almost straight and not touching antennal toruli; apical margin very shallowly emarginate, 0.35× as wide as clypeus, lateral teeth blunt and shortly carinate; clypeus in lateral view evenly convex, shallowly depressed near apex. Gena as wide as eye at bottom of ocular sinus; distance from posterior ocellus to occipital carina about 2.2× as distance from posterior ocellus to inner eye margin; vertex with very small cephalic foveae; occipital carina complete, strongly reflexed on upper three fourths of gena, angled and forming a blunt tooth in lower third. Mandible with five teeth. Scape 3.5× as long as apically wide; F1 1.3× as long as wide, F2 subquadrate, F3–9 wider than long. Mesosoma 1.55× as long as wide. Pronotal carina complete and sharp, produced on humeri but not spiniform. Mesoscutum 1.2× as long as wide; notauli impressed and complete, forming a shallow pit on anterior margin of mesoscutum; mesoscutum in lateral view weakly convex, somewhat flattened posteriorly. Scutellum smoothly passing into mesoscutum, weakly convex posteriorly; anterior margin crenate and forming 7-8 pits, the median one larger; median longitudinal furrow complete but shallow. Metanotum oblique and evenly sloping to propodeum. Epicnemial carina strong and complete, almost reaching pronotal margin. Posterior face of propodeum with strong median carina running from base to apex; dorsal faces of propodeum meeting along mid-line and forming a propodeal shelf shorter than metanotum, depressed in the middle and forming median pit; all carinae present but not sharp, crenate due to the coarse sculpture; submarginal carina produced into a sharp and pointed lobe above valvula; propodeal valvula with emarginate posterior margin, not completely fused to submarginal carina. T1 subpetiolate and narrower than T2, in dorsal view 1.1× as long as apically wide, sides evenly diverging from carina to apex; T 1 in lateral view with a thin short basal petiole, then abruptly swollen with evenly convex dorsal margin, shallowly depressed apically; transverse carina strong on the dorsal face, becoming blunter on sides, where it curves and almost reaches the posterior corners of the tergite. S1 subtriangular with concave apical margin, completely separated from T1. T 2 in dorsal view with weakly and evenly convex sides, weakly constricted apically; in lateral view weakly convex basally and then almost flattened, with preapical bulge preceding apical lamella; apical margin forming a long and thick subhyaline lamella, shallowly reflexed. S 2 in lateral view longer and more strongly and evenly convex than T2, with preapical bulge less evident; apical margin lamellate like T2, but more strongly costulate basally. T3 with shallowly carinate apical margin.

Clypeus with dense and strong punctures, larger in the center and bearing short setae; interspaces shorter than puncture diameter and sparsely micropunctate. Frons with dense and coarse flat-bottomed punctures, interspaces very narrow and raised to form reticulation. Vertex and gena similar to frons but punctures deeper and slightly sparser; lower part of gena with small and shallow punctures; occipital carina crenate along vertex. Scape with sparse and small punctures. Pronotum similar to frons but punctures larger; anterior face with very dense and coarse punctures in the upper half, smooth ventrolaterally. Mesoscutum with coarse punctures, similar to those on pronotum; interspaces sparsely micropunctate, narrower and forming reticulation anteriorly, becoming much wider posteriorly. Scutellum similar to pronotum, interspaces forming longitudinal carinae along posterior margin. Metanotum with smaller but denser punctures, interspaces reduced to longitudinal carinae along anterior margin. Tegula with sparse minute punctures. Mesepisternum with flat-bottomed punctures, larger and denser posterodorsally; epicnemium smooth. Dorsal plate of metaepisternum rugose, with short weak striation; ventral plate mostly smooth, with sparse shallow punctures. Dorsal faces of propodeum coarsely punctate, interspaces strongly raised and forming a sharp reticulation; lateral faces similar to dorsal faces but punctures much shallower and smaller; posterior face mostly smooth and shiny, with coarse punctures along dorsolateral margins and some fine striae along median carina. T1 with large and coarse punctures, slightly sparser and weaker basally; interspaces very narrow and forming a strong reticulation. T2 densely and deeply punctate, interspaces equal to slightly larger than puncture diameter and densely micropunctate; preapical swollen margin mostly smooth. T3–6 with minute punctures. S1 with coarse and flat-bottomed punctures, interspaces raised to form sharp reticulation. S2 similar to T2 but punctures sparser. Silvery setae on whole body, longer on head and mesosoma, shorter on metasoma, particularly dense on T1; face and posterior face of propodeum with dense pubescence; T2 and S2 with very short pubescence in addition to short oblique setae.

Black; following parts yellow to orange-yellow: basal spot on clypeus, small spot above interantennal space, ventral face of scape, small spot behind dorsal lobe of eye, transverse lines along anterior margin of pronotum, apical margin of T1, preapical bulge of T2, widely interrupted preapical line on S2, apical spot on fore and mid femora, outer face of fore and mid tibia, basal spot on hind tibia; tegula with suffused brown markings; apical lamella of T2 and S2 hyaline with yellowish-brown tinge. Wings hyaline with slightly darkened anterior margin.

Male. Unknown.

Distribution. Vietnam ( Fig. 10 ).

Etymology. The name refers to the strongly lamellate apical margin of T2 and S2. It is an adjective.

Figures

FIGURE 9. Pseudonortonia lamellata sp. nov., female holotype. A, habitus, dorsal view. B, habitus, lateral view. C, labels. D, head, frontal view. E, mesosoma, dorsal view. F, T1–2, dorsal view.

FIGURE 10. Distribution map of the Oriental species of Pseudonortonia.