Brachyzapus pyramidalis Choi & Lee, 2019

Choi, Jin-Kyung, Kolarov, Janko & Lee, Jong-Wook, 2019, Descriptions of two new species of Brachyzapus Gauld & Dubois (Hymenoptera: Ichneumonidae: Pimplinae) from South Korea with key to a Palaearctic species, Zootaxa 4711 (2), pp. 293-306 : 301

Brachyzapus pyramidalis Choi & Lee sp. nov.

( Figs 29–35 )

Specimens examined. Holotype: female, South Korea, GN, Hamyang-gun , Macheon-myeon , Deokjeon-ri , Mt. Jirisan National Park, Baekmudong, 35°21′13.95″N 127°40′41.97″E, 14.VIII–11.X.2011, J.C. Jeong (Type depository: YNU) . Paratypes: [ GB] 6♀♀ , Cheongdo-gun , Unmun-myeon, Mt. Unmunsan, (U2), 35°38′50″N 128°58′19″E, 15–24.V.2009, J.W. Lee (YNU) ; 1♀, ditto, Ssalbawi (U7), 35°38′08″N 129°01′27″E, 1.VIII– 21.IX.2012, J.W. Lee (YNU) ; 1♀, ditto, U4, 35°38′9″N 128°59′18″E, 14.VIII–6.IX.2009, J.W. Lee (YNU) ; 1 ♀, Uljin-gun , Mt. Baekamsan, 20.VI–12.VIII.1999, D.S. Ku (YNU); [ GG] 1♀, Anyang-si , Manan-gu , Anyangdong , Kwanak Arboretum, Alt. 133 m, 37°25′21.6″N 126°56′56.8″E, 25.IX–15.X.2008, J.O. Lim (YNU); [ GN] 6♀♀, same data of holotype ; 5♀♀, Sancheong-gun , Samjang-myeon , Yupyeong-ri , Mt. Jirisan National Park, Wangdeungjae, 35°23′8.81″N 127°46′44.11″E, 16.V–20.IX.2011, J.C. Jeong (YNU) ; 3♀♀, Hadong-gun , Pagyemyeon , Daeseong-ri , Mt. Jirisan National Park, Bitjeom, 35°18′30.94″N 127°37′28.36″E, 25.VIII–15.X.2011, J.C. Jeong (YNU) ; 1♀, Sancheong-gun , Sicheon-myeon , Jungsan-ri, Sunduryu, 35°16′29.75″N 127°33′57.57″E, 18.VII–12.X.2011, J.C. Jeong (YNU) ; 1♀, Mt. Jirisan National Park , Baemudong, 30.VII.1987, J.Y. Cha (YNU) ; 1♀, Mt. Jirisan National Park , 10.VIII.1989, Y.J. Kwon (YNU) ; 1♀, Seongju-gun , Suryun-myeon , Baegun-ri, Mt. Gayasan National Park, 28.V–4.VI.2016, S.H. Kang (YNU); [ JB] 1♀, Namwon-si , Jucheon-myeon , Mt. Jirisan National Park, Guryong valley, 35°23′19.89″N 127°27′44.51″E, 30.IX.2011 – 2.I.2012, J.C. Jeong (YNU) ; 1♀, ditto, Jeongnyeongchi , 18.VII–3.VIII.2001, J.W. Lee (YNU); [ JN] 5♀♀, Gurye-gun , Gurye-eup , Mt. Jirisan National Park, Nogodan, 35°17′47.11″N 127°31′36.48″E, 20.V–10.X.2011, J.C. Jeong (YNU) ; 4♀♀, Gurye-gun , Masanmyeon , Hwangjeon-ri, Hwaeom valley, 35°15′32.08″N 127°29′55.67″E, 15.VII–18.X.2011, J.C. Jeong (YNU) ; 1♀, ditto, 9.III–15.VII.2011, J.C. Jeong (YNU) .

Description. Female. Fore wing 8.0– 8.6 mm, body 10.0– 12.3 mm, ovipositor sheath 1.9–2.3 mm long.

Colour. Black. Fore and mid coxae except base, hind coxa apically, all trochanters except hind trochanter from above, hind tibia basally and base of first hind tarsal segment yellow. Fore leg except femur from behind, apex of mid femur, mid tibia on base, hind tibia on the middle yellowish brown. Hind tibia darkened in apical third and subbasally. Flagellomeres and pterostigma brownish.

Head. Head strongly narrowed behind ( Fig. 32 ). Inner orbits moderately convergent down, weakly excavated near antennal sockets ( Fig. 31 ). Clypeus almost square. Malar space 0.25 × as long as basal width of mandible. Upper tooth of mandible longer than lower tooth. Mandible twisted so the lower tooth is shifted but visible. Frons smooth, deeply concave. Diameter of ocellus as long as distance between lateral ocellus and eye. Occipital carina strong, joined with lamelliform hypostomal carina far from base of mandible. Antenna with 29 flagellomeres; first flagellomere 5.1 × as long as wide, all flagellomeres elongated.

Mesosoma . Mesosoma pubescent and shiny, moderately dense and finely punctured except lower lateral part of pronotum, posterior part of mesopleuron and lower half of metapleuron. Epomia strong ( Fig. 34 ), notauli long and distinct. Lateral margin of mesoscutum behind tegula strongly widened, lamelliform. Scutellum pyramidal, somewhat compressed, carinated to the middle ( Fig. 33 ). Mesopleuron with longitudinal swelling below subtegular ridge ( Fig. 34 ). Fore wing with weakly postfurcal nervulus, parallel vein joined postnervulus distinctly below its middle ( Fig. 35 ). Hind wing with six distal hamuli and moderately reclival nervellus, intercepted slightly above middle ( Fig. 35 ). Legs rather stout, hind femur 4.0 × as long as wide, correlations between lengths of hind tarsal segments are 45:20:11:6:24. Propodeum with lateral carina only on its apical 0.25. Pleural carina well developed ( Fig. 34 ). Spiracle oval, distal from pleural carina by its diameter length. Submetapleural carina well presented, angulate curved in the middle.

Metasoma. Metasomal tergites slender ( Figs 29, 30 ), first tergite 2.5 × as long as wide in dorsal view. Median dorsal carina short, ended before middle of the tergite. Lateral dorsal carina reaching apical margin of tergite, touching small spiracle. Second tergite 1.5 × as long as wide in dorsal view. Ovipositor sheath 0.65 × as long as hind tibia.

Male. unknown.

Etymology. The name follows from scutellum with pyramidal shape.

Distribution. South Korea.

Remarks. It is similar to Brachyzapus tenuiabdominalis (Uchida) , but distinguished from the by longer malar space; lamelliform hypostomal carina; first tergite longer; median dorsal carina of first tergite shorter; black hind femur and coloration of the body.

Figures

FIGURES 29–35. Brachyzapus pyramidalis sp. nov.: 29–Habitus in lateral view; 30–Habitus in dorsal view; 31–Head in frontal view; 32–Head in dorsal view; 33–Mesoscutum and propodeum; 34–Mesosoma in lateral view; 35–Wings. Scale bars: 2 mm=29,35; 1 mm=33,34; 0.2 mm=31,32.