Reikosiella (Hirticauda) koreana, Fusu, Lucian, 2013

Fusu, Lucian, 2013, A revision of the Palaearctic species of Reikosiella (Hirticauda) (Hymenoptera, Eupelmidae), Zootaxa 3636 (1), pp. 1-34 : 21-23

7. Reikosiella (Hirticauda) koreana sp. nov.

( Figs 9 , 27–29 )

SPECIMENS EXAMINED. Holotype Ƥ: S. KOREA Jeollabukdo, Buan-/ gun, Sannae-myeon, Yuyu/ 2 Malaise traps, low hill at/ forest edge/ 05.VII–14.VIII.2007 Tripotin rec. (AICF) [card mounted on the right side, uncontorted, entire]. Paratypes: 23 (including the allotype) same data as the holotype. 13, S. KOREA Chungbuk, Okcheon-/ gun, Dongi-myeon, Soesan-li/ 150m, Malaise trap/ N 36˚16.594’ E 127˚36.742’/ 08–17.VI.2004 Tripotin rec. 1Ƥ, S. KOREA: Chungnam, Keum-/ san, Nami-myeon Seokdong/ Pohyeonsa, 6 Malaise tr. forest/ N 36˚03.494’ E 127˚27.225’/ 1–8.VI.2005 Tripotin rec. 2Ƥ, same data as the above Ƥ but 24.VI–21.VII.2005. 13, same data but 21–31.VII.2005. 23, same data but 31.VII–28.VIII.2005. 1Ƥ, S. KOREA Jirisan, Hamyang,/ Songjeon-li, Munsu-sa, 400m / 4 Malaise tr. in forest/ N 35˚24.739’ E 127˚43.818’/ 06–27.vi.2004 Tripotin rec. (AICF, the Ƥ from 1– 8.VI and the 3 from 08–17.VI.2004 will be deposited in CNC).

DESCRIPTION. FEMALE. Holotype Ƥ: Length 1.25 mm. Head ( Fig. 9 ) brownish-yellow, with green and magenta reflections under some angles, especially on frontovertex and gena; maxillary and labial palpi whitish. Antenna with scape yellowish-brown, with faint magenta lustre under some angles of light and slightly darkened along ventral margin; pedicel concolorous with scape and F1 and F2 of slightly darker hue; F3–F7 white; F8 and clava dark brown. Mesosoma ( Fig. 29 ) with pronotum yellowish-brown, with bright green and purple metallic lustres dorsally under some angles of light, and a small dark brown spot on lateral corner anterior to each spiracle; mesoscutum and tegula light brown with mostly green reflections; scutellum, axillae, and dorsellum yellow, contrasting with surrounding sclerites; propodeum brown; prepectus and acropleuron brownish-yellow, the latter darker below wing base and with a faint green lustre; mesepisternum brown. Fore wing with pale brownish venation except median part of submarginal vein lighter; disc faintly infuscate, with a brownish area in basal third of basal cell, a narrow fuzzy transverse band behind parastigma and an even more inconspicuous wide band behind stigmal vein and distal end of marginal vein ( Fig. 28 ). Legs primarily brownish-yellow with following regions darker: front femur on distal half of posterior surface, dorsal surface of front tibia, mid femur on distal half of posterior and dorsal surfaces, hind coxa and femur except posterior surface, and a broad fuzzy subapical ring on hind tibia. Metasoma with Mt1 brownish, Mt2 and Mt3 translucent, whitish, but Mt2 with pale brown base, Mt4–Mt8 light-brown, with faint green and purple metallic lustres. Ovipositor sheath with a broad, dirty-white ring, basal 1/4 and apical 1/5 graduated brownish.

Head shiny, with lower face, gena, temples, and vertex from posterior ocelli and occipital area finely alutaceous and remaining frontovertex and scrobal depression shiny with sparse setiferous pinprick-like punctures; setae on frontovertex black and semierect, and inconspicuous on lower face ( Fig. 9 ). Frontovertex 0.4× head width, with ocelli arranged in an equilateral triangle. Eye virtually bare, with short hairs visible only under very high magnification. Toruli with upper margin in line with lower orbit. Scape in dorsal view strongly curved, in outer view about 3.5× as long as wide, nearly straight dorsally, and ventrally relatively evenly curved and without a ventral lamina; in outer view pedicel 2.5× as long as wide, F1 quadrate, F2 only slightly longer than wide, and following segments all longer than wide, of similar length but gradually broadened toward clava, with F8 about 1.5× as long as wide; clava 3.3× as long as wide, only slightly shorter than combined length of apical three funiculars; pedicel plus flagellum 1.6× HW. Relative measurements: HW 23, FV 10, HL 13, HH 20, EL 13, EW 10, MS 8, LOL 2.5, OOL 2, POL 3, MPOD 2.5, SL 14.5, SW 4.

Mesosoma with pronotum shiny, with a weakly sclerotized median line and a long erect seta near each lateral corner; mesoscutum smooth and shiny except with longitudinal rugae in front of anterior angle of scutellum delimited laterally by shallow oblique depression, each bearing a long, black, erect seta, convex median lobe inconspicuously coriaceous, lateral lobes carinated in posterior quarter, with a few translucent setae arranged in one external and one internal row. Axillae obliquely imbricate-alutaceous, appearing striate, with anterior edge in same plane as scutellum base, convexly sloping and with a single erect seta posteriorly; scutellum convex, dorsally circularly coriaceous (mesh size much smaller than an ommatidium), but becoming imbricate-coriaceous posteriorly with gradually effaced sculpture, and with four long, black, erect setae. Dorsellum with a narrow linear median lobe covering extreme apex of scutellum. Propodeum with a broadly U-shaped plical depression about as wide as plical region, with plical region narrow and anteriorly with broadly U-shaped and posteriorly with broadly ∩-shaped carinae nearly touching medially, without a connecting median carina; callar region slightly convex with a few long setae in outer half, and with a moderately large spiracle much smaller than a posterior ocellus separated from anterior margin by distance equal to its own smallest diameter. Acropleuron bare, polished except imperceptibly alutaceous anteriorly and posteriorly; cuticle very thin so that attachment site of mesotergalmesopleural muscle clearly visible; acropleural sulcus anteriorly completely obliterated and visible only as a line of three setae; mesepisternum alutaceous, with a few white setae partly along acropleural sulcus. Hind coxa smooth, with a few short, translucent setae along ventral margin of outer surface and along dorsal edge. Mesotibia with 4 inconspicuous apical pegs. Fore wing 3.25× as long as wide; basal cell bare except dark base microsetose and with a few setae in front of mediocubital fold; costal cell with a single median line of setae; parastigma with longer, darker setae than rest of disc, which is evenly setose with short, brownish setae; setae on marginal vein and marginal fringe conspicuously long, the longest setae slightly longer than stigmal vein; venation with thick long uncus and enlarged stigma ( Fig. 37 ), cc: mv: stv: pmv: uncus: u-pmv = 6: 8.3: 1: 1.3: 0.7: 0.17. Relative measurements: MSL 37, MSCL 18, MSCW 17, SCL 10, SCW 7, AXW 5, AXL 5.5, FWL 65, FWW 20, cc 18, mv 25, stv 3, pmv 4, uncus 2, u-pmv 0.5, HWL 61, HWW 9, MT 26, HT 24.

Metasoma with terga imbricate-coriaceous to reticulate, sparsely setose on sides; Mt7 covering Mt8 (syntergum) up to the dorsally facing anal sclerite, the latter displaced anteriorly so that syntergum extends posteriorly to emargination surrounding anal sclerite as a gradually slopping, medially divided surface; Mt2–Mt6 with posterior margins apparently straight. Ovipositor sheath 0.8× hind tibia length. Relative measurements: MTL 40, MTW 20, OL 19.

MALE. Allotype length 0.8 mm. Head and mesosoma ( Fig. 27 ) dark brown with very faint coppery and green reflections, propodeum bright green, shiny, with some violet reflections on callar regions and dorsellum with violet lustre under some angles. Maxillary and labial palpi whitish. Antenna with scape and pedicel pale brown, except scape darkened along dorsal margin and pedicel at base, flagellum pale brown, lighter than pedicel, all antennal segments with faint violet and green lustres under some angles. Wings translucent with light brown venation, only base of submarginal vein darker. Legs pale yellowish-brown, with brown coxae and following extensively brown: femora except fore and mid femora ventrally, and hind tibiae except apically. Metasoma concolorous with mesosoma.

Head polished except finely coriaceous mostly on lower face and parascrobal area, with numerous dark, semierect, short setae on parascrobal area and frontovertex and a few adpressed, short setae on lower face; scrobal depression shiny, shallow, wide-ovoidal, without a depression at upper limit, delimiting a broad parascrobal region. Frontovertex about 0.6× head width, with ocelli arranged in an obtuse triangle of about 115°. Eye virtually bare. Toruli with ventral margin above lower orbit. Scape in dorsal view imperceptibly curved, in outer view 2.4× as long as wide, with evenly curved dorsal margin, more expanded ventrally and wider in basal third; in outer view pedicel 1.5× as long as wide, F1 anelliform, inconspicuous, F2 2× as long as wide, as long as pedicel, and following segments all longer than wide, similar to F2 but gradually longer up to F4 and F5, then gradually shortened, with F8 equal in length to F2, and with all flagellomeres swollen dorsally at base, though F2 and F8 less conspicuously so; swollen parts with vertices of unusually long setae directed dorsally and laterally, the setae on F2 and F3 as long as F2 to F4 combined and length of setae decreasing gradually toward last segment of clava; clava tapered to apex and about 5× as long as wide, as long as two and a half apical funiculars ( Fig. 27 ); pedicel plus flagellum 2.2× HW. Relative measurements: HW 19, FV 11, HL 9, HH 15, EL 8, EW 7, MS 5, LOL 2.5, OOL 1.5, POL 5, MPOD 2, SL 6, SW 2.5.

Thorax with inconspicuous dark setae dorsally; pronotum undivided medially, dorsal surface polished and lateral surfaces coriaceous; mesoscutum with deep notauli and imbricate-coriaceous median lobe, lateral lobes with effaced coriaceous sculpture similar to scutellar-axillar complex. Dorsellum narrow, linear. Propodeum smooth with a blunt median carina, and with a few sparse setae laterally. Hind coxa smooth, finely coriaceous, with bare outer surface. Fore wing entirely setose except basal cell and small indistinct area of sparser setae behind parastigma, and basal, cubital and mediocubital folds with lines of setae; venation with thin long uncus and slightly enlarged stigma ( Fig. 27 ), cc: mv: stv: pmv: uncus: u-pmv = 3.5: 3.6: 1: 1.5: 0.25: 0.5. Relative measurements: MSL 23, MSCL 8, MSCW 13, SCL 9, SCW 6, AXW 5, AXL 6, FWL 46, FWW 21, cc 14, mv 14.5, stv 4, pmv 6, uncus 1, u-pmv 2, HWL 40, HWW 5.5.

Metasoma in dorsal view not petiolate, terga imbricate-alutaceous and sparsely setose. Relative measurements: MTL 25, MTW 8.

VARIABILITY. Female paratypes length: 1.1–1.5 mm. Color varies very little except the extent of fore wing infuscation, which in the smallest specimen is very faint. In some specimens F1 and F2 are much darker than the pedicel and the acropleuron is uniformly brownish-yellow. In the largest specimen the scutellum has five erect setae. Female relative measurements: HW 20–27, FV 8.5–10.5, HL 12–15, HH 16–22, EL 11–15, EW 8–11, MS 6–9.5, LOL 2–2.5, OOL 1.5–2.5, POL 2.5–3, MPOD 2–2.5, SL 11.5–15, SW 3.5–4.5, MSL 32–44, MSCL 14–20, MSCW 15–20, SCL 8.5–12, SCW 5.5–8, AXW 4.5–6, AXL 5–6.5, FWL 57–74, FWW 17–23, cc 15–22, mv 22–29, stv 2.5–3, pmv 4–4.5, uncus 2, u-pmv 0.5–1, HWL 50–70, HWW 8–11, MT 22.5–31, HT 20–27, MTL 33–47, MTW 18–25, OL 15–21.

Male paratypes length: 0.7–1 mm. Male relative measurements: HW 15.5–23, FV 9.5–12.5, HL 8–11, HH 13–18, EL 6.5–11, EW 6–9, MS 4.5–6, LOL 2–2.5, OOL 1.5–1.7, POL 4–5, MPOD 1.5–2.5, SL 5.5–8, SW 2–3, MSL 20–31, MSCL 7.5–8, MSCW 12–16, SCL 8.5–12, SCW 5.5–6.5, AXW 4–6, AXL 5.5–7, FWL 41–55, FWW 18–27, cc 12–18, mv 13–17, stv 3–4, pmv 4–7, uncus 1–2, u-pmv 2–3, HWL 32–47, HWW 4.5–8, MT 12.5–18, HT 12.5–18, MTL 19–31, MTW 6–11.

RECOGNITION. Both sexes of R. koreana are very small, the males especially conspicuously dwarfed. Females have a mostly pale yellowish, translucent body with much reduced metallic lustre. The fore wing is narrow with comparatively long marginal setae and conspicuous setae on the marginal and postmarginal veins. The acropleural sulcus is completely obliterated anteriorly and visible only as a line of setae. Mt8 (syntergum) is covered by Mt7 up to the dorsally facing anal sclerite, similar to R. vanharteni , but in R. koreana the anal sclerite is displaced anteriorly so that the syntergum extends posteriorly to the emargination surrounding the anal sclerite as a gradually slopping, medially divided surface. Males have a fore wing setal pattern similar to females but a unique antenna, with all flagellomeres swollen dorsally at the base, and the swollen parts bearing vertices of unusually long setae directed dorsally and laterally.

BIOLOGY. Unknown.

DISTRIBUTION. South Korea.

Figures

FIGURES 7 – 16. Reikosiella (Hirticauda) Ƥ: 7, R. andriescui dorsal habitus. 8, R. vanharteni head. 9, R. koreana head. 10, R. rostrata dorsal habitus. 11, R. hungarica dorsal habitus. 12, R. tripotinorum dorsal habitus. 13, R. gordoni dorsal habitus. 14, R. bolivari dorsal habitus. 15, R. graeca dorsal habitus. 16, R. cornuta dorsal habitus. Scale bar 0.5 mm for 7, 10 – 16 and 0.1 mm for 8 – 9.

FIGURES 23 – 30. Reikosiella (Hirticauda) 3 habitus: 23, lateral R. gordoni Ƥ habitus. 24, lateral R. cornuta Ƥ habitus. 25, lateral R. vanharteni Ƥ habitus. 26, dorsal R. vanharteni Ƥ habitus. 27, lateral R. koreana 3 habitus. 28, lateral R. koreana Ƥ habitus. 29, dorsal R. koreana Ƥ habitus. 30, lateral R. vanharteni 3 habitus. Scale bar 0.5 mm.

FIGURES 31 – 40. Reikosiella (Hirticauda) Ƥ fore wing venation: 31, R. andriescui (inverted image of left wing). 32, R. bolivari. 33, R. cornuta. 34, R. hungarica. 35, R. graeca. 36, R. gordoni (ventral side of left wing). 37, R. koreana. 38, R. rostrata. 39, R. tripotinorum. 40, R. vanharteni. Scale bar 0.2 mm.