Empria wui Wei & Nie, 1998

Park, Bia, Prous, Marko & Lee, Jong-Wook, 2019, Taxonomic review of the genus Empria Lepeletier & Serville (Hymenoptera, Tenthredinidae) in South Korea: morphological and molecular identification of two new species, Journal of Hymenoptera Research 74, pp. 1-25 : 1

Empria wui Wei & Nie, 1998

Figs 2A, B, E, G, I, J , 5A-G , 6C , 7C

Empria wui Wei & Nie, 1998: 363-386.

Diagnosis.

Female ( Figs 2A, E, I , 5A-G , 6C ). Body length 5.2-6.0 mm. Head and thorax black, except cenchrus white; posterodorsal margin of pronotum, apical 1/3 of fore femur, apex of middle and hind femora slightly, fore and middle tibiae anteriorly, basal 2/3 or less of hind tibia yellowish brown; labrum, labial and maxillary palps dark brown at apex; apical half of mandible reddish dark brown; abdomen dark brown, segments with posterior whitish (pale) margins and abdominal terga with 3-4 pairs of large pale patches (Figs 2A, B, E, G, I, J , 5B, C, E ). Malar space about 1.2 times as long as diameter of median ocellus ( Figs 2I, J , 5E ). Flagellum 1.5-1.8 times as long as head width. Vein 2A+3A in fore wing incomplete; vein m-cu in hind wing absent, cell M open ( Fig. 2A, B ). Claws simple or with small denticle ( Fig. 5A ). Ovipositor sheath extending beyond apex of abdomen ( Figs 2E , 5D ). Lancet with 16-18 serrulae, membrane between serrulae weakly convex; each serrula subtriangularly protruding basally ( Figs 5G , 6C ), with a basal denticle and roughly 4-10 distal denticles.

Male (hitherto undescribed) ( Figs 2B, G, J , 7C ). Body length 4.5-5.0 mm. Similar to female, but flagellum 1.9-2.1 times as long as head width. Posterior margin of sternum 9 truncated. Penis valve as in Fig. 7C , valviceps almost equal in length to valvura.

Genetic data.

Based on the barcode region of two COI sequences available in GenBank, the distance between the specimens from China and Japan is 2.6% (same distance based on the complete COI). The nearest neighbour, diverging by 2.3-2.7% (or 2.5-3.1% based on the complete COI), is possibly an undescribed species from China (sp. 2 in Prous and Heidemaa 2012). Based on the nuclear ITS, the distance between the specimens from China and Japan is 0.7%. The nearest neighbour based on nuclear ITS, diverging by 1.4%, is sp. 2 in Prous and Heidemaa (2012). Nuclear NaK and POL2 are only available for one specimen from Japan and the nearest neighbour being E. liturata (Gmelin), diverging by 5.3%, but this data is unavailable for sp. 2 from Prous and Heidemaa (2012).

Type specimen examined.

China: ♀, holotype of Empria wui (CSCSEmp6), "Zhejiang, Longwangshan, 30.4N, 119.4E, 7.IV.1996, Hong Wu" (CSCS).

Additional specimens examined.

South Korea: 1♂, Gyeongsangbuk-do, Yeongju-si, Dansan-myeon, Marak-ri , San 46-5, Mt. Sobaeksan , Euipungji , 5.IV-3.V.2016, E.J. Hong (NIBR) ; China: 1♀, Shanxi, Alt. 1703 m, 37.8314N, 111.4861E, 30.V.2008 (CSCS; W08-03a) ; Japan: 1♂, Ibaraki, Mt. Tsukuba, Alt. 800 m, 36.2256N, 140.1038E, 20-21.IV.1989 (MT), M.J. Sharkey (USNM; USNM2051678_022) ; 2♂♂, Tochigi, Tamozawa, Nikkô-shi, 2-13.IV.2009 (MT), T. Nakamura (USNM; 1♂, USNM2057434_01; 1♂, USNM2057434_27) .

Host plant.

Unknown.

Distribution.

South Korea (new record), Japan (new record), China ( Wei and Nie 1998).

Remarks.

Belongs to E. wui group ( Prous and Heidemaa 2012). Prous and Heidemaa (2012) already treated this species (along with related species), but they suggested that some of the specimens treated here might represent species different from E. wui . Because the differences are similar to intraspecific variation in other Empria species, we consider the sp. 1 and sp. 3 mentioned in Prous and Heidemaa (2012) to be conspecific with E. wui . The previously unknown male of E. wui is described for the first time. No females were collected in Korea and Japan, so the description is based on CSCS specimens (holotype of E. wui , Fig. 5 , and sp. 3) from China. This species has an incomplete vein 2A+3A in the fore wing, which is unusual among Empria species.

Figures

Figure 2. Empria spp.: A, B, E, G, I, J E. wui, female from Shanxi, China and male from Gyeongbuk, South Korea C, D, F, H, K, L E. zhangi from Gangwon, South Korea A, C dorsal habitus, female B, D dorsal habitus, male E, F lateral habitus, female G, H lateral habitus, male I, K frontal head, female J, L frontal head, male. Scale bars: 2 mm (A-D); 1 mm (E-H); 0.5 mm (I-L).

Figure 5. Empria wui, holotype (CSCSEmp 6). A claw B dorsal habitus C lateral habitus D lateral abdomen E frontal head F labels G ovipositor. Scale bars: 2 mm (B); 1 mm (C, D); 0.5 mm (E); 0.1 mm (A, G).

Figure 6. Female lancets. A Empria candidata from Gangwon, South Korea B E. tridentis from Gangwon, South Korea C E. wui from Shanxi, China (W 08 - 03 a) D E. zhangi from Jeonnam, South Korea E E. lycroi, sp. nov. from Primorsky Krai, Russia (paratype, NSMT 232) F E. nigroterga, sp. nov. from Daejeon, South Korea (paratype, YNU-Sym 1176). Scale bars: 0.1 mm (A-F).

Figure 7. Male penis valves. A Empria candidata from Gangwon, South Korea B E. tridentis from Gangwon, South Korea C E. wui from Gyeongbuk, South Korea D E. zhangi from Jeonnam, South Korea E E. lycroi, sp. nov. from Primorsky Krai, Russia (paratype, DEI-GISHym 83873) F E. nigroterga, sp. nov. from Gyeongbuk, South Korea (paratype, YNU-Sym 1173). Scale bars: 0.1 mm (A-F).