Euodynerus trilobus ( Fabricius, 1787 ), 2012

Tran, Tien Van, Vu, Thuong Thi, Nguyen, Cuong Quang & Nguyen, Lien Thi Phuong, 2025, Contribution to the knowledge of the potter wasp genus Euodynerus Dalla Torre, 1904 (Hymenoptera, Vespidae, Eumeninae) from Vietnam, with description of a new species and a key to the Oriental fauna, Journal of Hymenoptera Research 98, pp. 467-482 : 467-482

Euodynerus trilobus ( Fabricius, 1787)

Fig. 3 A – E

Vespa triloba Fabricius, 1787: 290.

Euodynerus trilobus ; van der Vecht and Fischer 1972: 101.

Material examined.

1 ♀, Lang Son, Huu Lung, Huu Lien, Huu Lien NR [1 ♂, 21°43'22.9"N, 106°22'40.2"E, alt. 370 m, 12 Jun. 2018, Nguyen Thi Phuong Lien et al. leg. ; 1 ♀, Phu Tho, Cam Khe , Jun. 2016, Vu Thi Thuong leg.

Male genitalia.

The genitalia of this species are described for the first time. Genitalia as in Fig. 3 A – E . SVIII ~ 1.9 × as long as wide (at widest part), with basal margin almost straight (Fig. 3 A ). Parameral spine without setae. Volsella flattened, spatulate, wide on inner aspect, and with setae at top (Fig. 3 B ). Digitus thick, almost like an orthogonal trapezoid shape, wide from base to near rounded apex, 2 × as long as wide (at widest part), surface without setae, with some short setae at left side (Fig. 3 C ). Penis valves long, much longer than basal apodeme (~ 1.9 × as long as basal apodeme); in ventral view, proximal part slightly produced laterally into a rounded shape (Fig. 3 D ); in lateral view, apical part strongly produced into a bluntly pointed lobe (Fig. 3 E ), dorsal rod shorter than basal apodeme.

Distribution.

British Indian Ocean Territories; Mauritius (Chagos Archipelago); Réunion; China: Zhejiang, Shanghai, Jiangsu, Anhui, Jiangxi, Guagdong, Guangxi, Hainan, Sichuan, Gansu, Guizhou, Taiwan, Hong Kong; Vietnam (new records: Lang Son); Malaysia; Indonesia: Java; Taiwan; Japan: Ryûkyû Islands.

Figures

Figures 3. Euodynerus trilobus (Fabricius, 1787). Male genitalia A SVIII, dorsal view B inner aspect of paramere with volsella and digitus C digitus D aedeagus, ventral view E aedeagus, lateral view. Scale bars: 0.5 mm (A, B); 1 mm (C, D, E).