Syzeuctus flavofacialis Kang & Lee, 2020

Kang, Gyu-Won, Kolarov, Janko & Lee, Jong-Wook, 2020, Review of the genus Syzeuctus (Hymenoptera, Ichneumonidae, Banchinae) from South Korea, Journal of Hymenoptera Research 80, pp. 17-30 : 17

Syzeuctus flavofacialis Kang & Lee sp. nov.

Fig. 3

Description.

Female. Body 10.0 mm in length. Fore wing 7.0 mm in length (Fig. 3A ).

Head in dorsal view flat with temple narrowed at an angle of more than 45°, round (Fig. 3C ). Face convex, densely and coarsely punctate; with median swelling and two lateral swellings above clypeal fovea (Fig. 3B ). Clypeus flat, with long and strong setae; apically truncate; clypeal fovea open. Mandible moderately stout, strongly tapered, upper tooth slightly longer than lower tooth; lower ridge strongly developed, lamelliform. Maxillary palp with five segments. Frons smooth, convex, with small dense punctures. Vertex more sparsely punctate than face. Occipital carina complete, slightly sinuous, joining hypostomal carina at mandibular base. Temple polished and convex, with fine punctures. Malar space about 0.5 times as long as basal mandibular width. Inner margins of eyes parallel. Antenna filiform with 42 flagellomeres; first flagellomere 4.5 times as long as its width, 1.6 times as long as second flagellomere.

Mesosoma with dense and long setae. Pronotum with rugoso-punctures; upper posterior margin hook-shaped. Mesopleuron with epicnemial carina laterally, uniformly punctate except medially where it is polished and impunctate; punctures bigger than those on pronotum; postpectal carina absent. Metapleuron with dense and coarse punctures. Submetapleural carina complete, anterior half strongly developed. Mesoscutum irregularly densely punctate, notaulus absent. Scutellum, in profile, slightly convex, densely punctate. Propodeum in dorsal view very stout, closely punctate towards rugose, partly with long and dense setae (Fig. 3E ); spiracle of propodeum oval; without posterior transverse carina. Legs slender. Fore tibial spur sinuate. Fore and mid tarsal claws pectinate. Ratio of hind tarsal segments 2.5:1.4:1.0:0.5:0.6; hind tarsal claw not pectinate. Hind wing with eight hamuli.

Metasoma depressed with shallow and dense punctures (Fig. 3H ). First tergite rectangular, 1.8 times as long as posterior width, without lateral longitudinal carina (Fig. 3F ). Second tergite coriaceous, 1.2 times as long as posterior width. Ovipositor sheath with dense, short setae, 1.6 times as long as metasoma, 4.0 times as long as hind tibia.

Color black with yellow marks.

Head black. Face yellow with black median longitudinal mark (Fig. 3B ); area around clypeal fovea black. Mandibular teeth black. Frontal orbit and genal orbit broadly yellow. Malar space yellow. Antenna brown; scape black with brown ventrally; pedicel yellow. Mesosoma black with yellow marks (Fig. 3D ). Mesoscutum black with anterior triangular yellow spot on each side; medially with big yellow spot. Scutellum entirely yellow. Upper margin of pronotum broadly yellow; lower anterior margin with yellow spot. Tegula yellow. Mesopleuron black with yellow upper margin and lower posterior margin, slightly above middle with short yellow short boomerang-shaped mark. Propodeum in dorsal view with yellow spot on each side of anterior part; triangular yellow mark posteriorly (Fig. 3E ). Fore and mid legs bright yellow with brown apex of mid tarsus and tarsal claw. Hind coxa and trochanter black; trochantellus yellow; femur bright brown; all tarsal segments yellow with black each apically; tarsal claw black. Wings weakly infuscate (Fig. 3G ). Metasoma black. First tergite black with yellow anterior third; first to fourth tergites each with a posterior yellow line (Fig. 3H ).

Material examined.

Holotype. ♀, South Korea, [GW] Wonju-si Heungeop-myeon Maeji-ri Yensei Univ., 18 Jul.-4 Sep. 2015, H. Y. Han (GEI) leg . Paratypes (GEI). South Korea: 1♀, [CB] Cheongwon-gun Miwon-myeon Miwon-ri , 2229 Jul. 2005, J. H. Han leg. ; 1♀, [CB] Sobaeksan Danyang-gun Danyang-eup , 25 Jun.-9 Aug. 2007 ; 1♀, [CN] Mt. Deoksungsan Sudeoksa , 11 Aug. 1983, J. W. Lee leg. ; 1♀, [Daejeon] Dong-gu Daejeon Univ. , 15 Aug.-30 Sep. 2006, J. W. Lee leg. ; 1♀, [Daejeon] Seo-gu Wolpyeong-dong Wolpyeon park, 20 Jun.-10 Aug. 2008 ; 1♀, [GB] Yeoncheon-si Cheongtong-myeon Temp. Eunhaesa , 21 Jul.-10 Aug. 2015, J. W. Lee leg. ; 1♀, [GB] Yeonju-si Dansan-myeon Jwaseok-ri Mt. Sobaeksan Yeonhwa 2 bridge, 6 Aug.-8 Sep. 2016, Y. J. Kim leg ; 2♂, [GG] Annyang-si Manan-gu Gwanaksan , 519 Jul. 2007, J. O. Lim leg. ; 2♀♀, [GG] Anyang-si Kwanak , 26 Jul.-7 Aug. 2008 ; 1♀, [GG] Goyang-si Deog-yang-gu Goyang-dong , 24 Aug.-6 Sep. 2007, J. O. Lim leg. ; 1♀, [GW] Donghae-si Samhwa-dong Mureung valley , 15 Jul.-1 Aug. 2005 ; 1♀, [GW] Wonju-si Heungeop-myeon Maeji-ri Yensei Univ. , 11 Aug.-8 Sep. 2007, H. Y. Han leg. ; 1♀, ditto, 31 Jul.-5 Sep. 2014, H. Y. Han leg. ; 1♀, ditto, 18 Jul.-4 Sep. 2015, H. Y. Han leg. ; 1♀, [Incheon] Ongin-gun Daecheong-myeon daecheongri [natural habitat of Camellia japonica ] Daecheongdo , 9 Aug. 2017, J. W. Lee leg. ; 1♀, [JB] Buan-gun Jinseo-myeon Unho-ri San 1-1, 7 Jul.-18 Aug. 2016, E. J. Hong leg. ; 2♀♀, [Seoul] Noweon-gu Sanggye 4-dong Mt. Suraksan , 18 Jul.-24 Aug. 2007, J. O. Lim leg.

Distribution.

South Korea (new record).

Remark.

This species is similar to S. sambonis in that its face is convex, but unlike S. sambonis , which has a face that is convex overall, S. flavofacialis has median and lateral swellings.

Figures

Figure 3. Syzeuctus flavofacialis Kang & Lee, female A habitus in lateral view B head in frontal view C head in dorsal view D thorax in lateral view E propodeum in dorsal view F first tergite in dorsal view G wings (left) H abdomen in dorsal view. Scale bars: 1.0 mm (A), 0.2 mm (B-F), 0.5 mm (G, H).