Eopriocnemis albiflagellata Loktionov et Lelej, 2019

Loktionov, V. M., Lelej, A. S. & Liu, J. - X., 2019, A new genus of spider wasps (Hymenoptera, Pompilidae) from China, Far Eastern Entomologist 376, pp. 1-14 : 3-5

Type species Eopriocnemis albiflagellata Loktionov et Lelej , sp. n.

DIAGNOSIS. The new genus is closely related to Priocnemis Schiødte, 1837 by having axilla broad and not separated medially in both sexes ( Figs 8 , 15 ), but easily differs by the following characters: abscissae Rs3 and Rs4 of fore wing forming distinct obtuse angle in both sexes ( Figs 17, 19 ) (vs not forming angle in Priocnemis );

pterostigma distinctly longer than SMC 2 in both sexes, especially in male ( Figs 17,

19) (vs distinctly shorter in Priocnemis ); T1 with long and narrow petiole basally in both sexes ( Figs 7 , 15 ) (vs usually without petiole in Priocnemis , rarely with short petiole (Shimizu, 1994: fig. 336)); head and pronotum strongly polished with scattered very fine punctures in both sexes ( Figs 5 , 13 ) (vs matt or barely polished with dense punctures in Priocnemis ); F6–F9 entirely ivory-white in female ( Figs 1, 2 )

(vs black in Priocnemis ); S2 with very fine transverse groove in female (vs with strong groove in Priocnemis ).

dorsal view; 2 – habitus, lateral view; 3 – head, frontal view; 4– head and pronotum, lateral view; 5 – head, pronotum and mesoscutum, dorsal view; 6 – mesosoma, lateral view; 7 –

mesoscutellum, metanotum, metapostnotum, propodeum and T1, dorsal view; 8 – axilla,

mesoscutellum, metanotum, metapostnotum and propodeum anteriorly, dorsal view. Scale bar: 1, 2 = 1.0 mm; 3–7 = 0.5 mm; 8 = 0.2 mm.

The new genus shows some similarity to Clistoderes Banks, 1934 and Ctenopriocnemis Ishikawa, 1962 by having abscissae Rs3 and Rs4 of fore wing forming distinct obtuse angle in both sexes ( Figs 17, 19 ) and T1 with basal petiole in female

( Fig. 7 ), but differs from both of them by having axilla broad and deep, not separated medially, its posterior margin straight in both sexes ( Figs 8 , 15 ) (vs axilla narrow and shallow, wedge-like and broadly separated medially in Clistoderes and Ctenopriocnemis ).

DESCRIPTION. FEMALE. Body slender, smooth and mostly without setae

Ocelli small and raised; ocellar triangle acute-angled ( Fig. 5 ); POD/OOD=0.25.

Clypeus long, noticeable narrowing toward apex ( Fig. 3 ). Mandible with subapical blunt and small tooth. Antenna slender, F1 length 5.0× its width and 0.8× UID.

Pronotum without anterior declivity, i. e dorsum merging with collar ( Figs 4, 6 ) and barely convex. Axillae broad and deep not separated medially, with straight posterior margin ( Fig. 8 ). Metapostnotum 1.2× longer than metanotum medially ( Figs 7, 8 ).

Propodeum evenly convex with posterior declivity not differentiated from dorsum

( Fig. 6 ). Fore wing ( Fig. 17 ) with pterostigma 1.5× longer than SMC2 on vein M;

abscissae Rs3 and Rs4 forming distinct obtuse angle. Metatibia dorsally with well developed row of scale-like teeth ( Figs 27, 28 ). Orbicular pecten with 8–9 weak,

almost straight setae, longest one 0.7× claw length. Arolium normal, apically not extending beyond apex of claw. Claws symmetrical with preapical inner tooth noticeably larger than apical one ( Fig. 25 ). S2 with weak transverse furrow. T1

basally with long and narrow petiole ( Fig. 7 ). Frons, occiput, vertex, gena and pronotum strongly polished with scattered fine punctures ( Figs 3–5 ).

MALE. Similar to female. Body slender, smooth and mostly without setae. Vertex strongly raised between eye tops ( Fig. 11 ). Ocelli small, entirely raised; ocellar triangle barely acute-angled ( Fig. 13 ); POD/OOD=0.25. Antenna slender ( Fig. 10 );

F3–F10 barely convex ventrally and concave dorsally; F1 length 3.2× its width and

0.45× UID. Pronotum without distinct anterior declivity, i. e dorsum merging with collar ( Fig. 14 ) and barely convex. Metapostnotum 1.3× metanotum length ( Fig. 15 ).

Propodeum evenly convex with posterior declivity not differentiated from dorsum

( Fig. 14 ). Fore wing ( Fig. 19 ) with pterostigma 1.6× SMC2 length on vein M;

abscissae Rs3 and Rs4 forming distinct obtuse angle. Metatibia dorsally with row of small teeth each of them ending with short spine ( Fig. 29 ). Orbicular pecten with 5–6

weak, straight setae, longest one 0.7× claw length. Arolium normal, apically not extending beyond apex of claw. Claws symmetrical with preapical inner tooth noticeably larger than apical one ( Fig. 26 ). T1 basally with long and narrow petiole

( Fig. 15 ). Hypopygium flattened ( Figs 23, 24 ). Head and pronotum strongly polished with scattered fine punctures ( Figs 11–13 ).

ETYMOLOGY. The new name is a combination of "Eos" (Greek Goddess of the daybreak) with reference to Oriental distribution of new genus and the generic name

Priocnemis .

SPECIES INCLUDED. Type species only.

DISTRIBUTION. Oriental region ( China: Hainan).

REMARKS. The new genus is obviously distributed widely and occures in neighbouring countries such as Vietnam, Lao and Thailand, like the genera Nipponodipogon and Eopompilus known from the south of China (Yunnan, Guangdong and

Hainan) have been found in Laos (Loktionov & Lelej, 2018 ; Wahis et al., 2018).

Figures

Figs 1–8. Eopriocnemis albiflagellata Loktionov et Lelej, sp. n., holotype, ♀. 1 – habitus,

Figs 9–16. Eopriocnemis albiflagellata Loktionov et Lelej, sp. n., paratype, ♂. 9 – ha-

Figs 17–29. Eopriocnemis albiflagellata Loktionov et Lelej, sp. n. 17, 18, 25, 27, 28 –