Okinawepipona yty Nguyen, 2018

Nguyen, Hieu Van, Nguyen, Manh Thanh & Nguyen, Lien Thi Phuong, 2024, Discovery of the male of Okinawepipona yty Nguyen, 2018 (Hymenoptera: Vespidae: Eumeninae) from Vietnam, Zootaxa 5399 (1), pp. 79-84 : 80

Okinawepipona yty Nguyen, 2018

Figs. 1–7

Okinawepipona yty Nguyen, 2018: 592 , 596 (key), female – “Y Ty, Bat Xat, Lao Cai ” (IEBR).

The male specimens we examined are from the type locality and agree well with the description by Nguyen et al. (2018). As described below, the male is similar to the female both in structure and coloration except for some few characters.

Material examined. VIETNAM: Lao Cai: 12 ♀, 16 ♁, Y Ty, Bat Xat, 22°36′29.5″N 103°37′29.6″E, alt. 1869 m, 6 May 2019, Nguyen Quang Cuong leg. ; 3 ♁, Y Ty, Bat Xat, 22°37′14.5″N 103°37′25.5″E, alt. 1850 m, 15 July 2023, Nguyen Thi Phuong Lien, Nguyen Quang Cuong leg. [ IEBR]

Description. Male ( Fig. 4 ) [female characters in square brackets]. Body length 11–12 mm; forewing length 11–12 mm. Head in frontal view subcircular, wider than high, about 1.2× as wide as high [1.1× as wide as high] ( Fig. 1 ). Vertex without cephalic foveae [with cephalic foveae small, bearing dense pubescence, situated very close to each other, almost touching each other] ( Fig. 2 ). Distance from posterior ocellus to apical margin of vertex nearly 1.6× distance from posterior ocellus to inner compound eye margin [more than 1.7× distance from posterior ocellus to inner compound eye margin] ( Fig. 2 ). Gena slightly narrower than compound eye, in lateral view about 0.9× as wide as compound eye [much narrower than compound eye, in lateral view about 0.7× as wide as compound eye]. Occipital carina complete, present along entire length of gena, but dorsally somewhat weak. Inner compound eye margins strongly converging ventrally; in frontal view about 1.8× further apart from each other at vertex than at clypeus [1.3× further apart from each other at vertex than at clypeus]. Disc of clypeus in lateral view weakly convex at basal half, then straight to near apical margin; in frontal view 1.3× higher than wide [about as wide as high] ( Fig. 1 ), with basal margin almost straight [slightly convex medially] and distinctly separated from antennal sockets; apical margin deeply emarginate medially, forming very sharp tooth on each lateral side [forming sharp tooth on each lateral side] ( Fig. 1 ), without carina [with two faint carinae running from tooth at apical point to base direction]; width of emargination slightly greater than 1/3 width of clypeus between inner compound eye margins [width of emargination slightly less than 1/3 width of clypeus between inner compound eye margins]. Mandible with prominent teeth, second and third teeth with inner side almost straight [second and third teeth with inner side produced with round margin], fourth tooth pointed apically. Antennal scape about 3.3× as long as its maximum width [about 3.7× as long as its maximum width]; flagellomere I about 1.8× as long as wide [about 1.5× as long as wide], flagellomeres II and III slightly longer than wide [flagellomere III as wide as long], flagellomere IV as wide as long, flagellomeres V–IX wider than long, terminal flagellomere small, slightly curved, 3.5× as long as its basal width, reaching to near base of flagellomere IX when folded [terminal flagellomere bullet-shaped, as long as its basal width] ( Fig. 3 ).

Mesosoma, metasoma (except tergum VII and sternum VII), and body sculpture as same as in female except clypeus with dense, small, deep punctures [clypeus with dense, large, flat-bottomed punctures, each bearing silver bristle, punctures at center larger than at sides, space between punctures larger than puncture diameter]. Tergum VII and sternum VII with some small and sparse punctures come between minute punctures.

Color. Black; similar to female except clypeus almost entirely yellow [large spots on upper lateral corner and a large spot on lower middle of clypeus]; head black [narrow band along inner compound eye margin extending from bottom of frons nearly to ocular sinus, large spot between antennal sockets].

Genitalia. As in Figs. 5–7 . Parameral spine lacking setae. Volsella flattened, spatulate, wide on inner aspect, and without setae at top ( Fig. 5 ). Digitus knife-shaped, almost parallel at one-third from base, then gradually narrowing to top, with medium long setae on outer margin ( Fig. 5 ). Penis valves of aedeagus long, about 1.6× as long as basal apodeme, in ventral view proximal part produced laterally into a round lobe laterally with blunt apex in inner margin apically ( Fig. 6 ); in profile apical part produced into a round projection ( Fig. 7 ); dorsal rod of aedeagus shorter than basal apodeme apically ( Fig. 7 ).

Distribution. Vietnam (Lao Cai).

Figures

FIGURES 1–4. Okinawepipona yty Nguyen, 2018, male. 1 Head, frontal view 2 Head, dorsal view 3 Antenna 4 Habitus. Scale bars = 1 mm.

FIGURES 5–10. Okinawepipona yty Nguyen, 2018, male (5–7) and Okinawepipona curcipunctura Nguyen & Xu, 2014, male (8–10): 5, 8 Genitalia, inner aspect of paramere with volsella and digitus 6, 9 Aedeagus, ventral view 7, 10 Aedeagus, lateral view. Scale bars = 1 mm.