Reikosiella (Hirticauda) vanharteni, Fusu, Lucian, 2013

Fusu, Lucian, 2013, A revision of the Palaearctic species of Reikosiella (Hirticauda) (Hymenoptera, Eupelmidae), Zootaxa 3636 (1), pp. 1-34 : 30-32

10. Reikosiella (Hirticauda) vanharteni sp. nov.

( Figs 8 , 25–26, 30 , 40 )

SPECIMENS EXAMINED. Holotype Ƥ: UNITED ARAB EMIRATES:/ Wadi Wurayah, 25.24 N 56.17 E / 12–14.iv.2005, MT & water traps/ Anthony van Harten (CNC) [point mounted, uncontorted, entire except for missing right antenna beyond scape]; Paratypes: 13 same data as the holotype plus a label Reikosiella / ( Hirticauda )/ Det. G.A.P. Gibson 2010 (allotype) (CNC) and 1Ƥ UNITED ARAB EMIRATES:/ Wadi Maidaq/ 29.iii–10.iv.2006, water traps/ coll. AvH, UAE 6059 (AICF with permission from CNC).

ETYMOLOGY. Named in honor of Antonius van Harten in recognition of his contribution to the description of the arthropod biodiversity of U.A.E.

DESCRIPTION. Holotype Ƥ: length 2.1 mm. Body mostly dull, brownish. Head ( Fig. 8 ) brown with faint bluish or greenish lustres except on frontovertex and scrobal depression; maxillary and labial palpi brown. Antenna with scape yellowish except extreme base darker, pedicel and basal flagellomeres dark-brown with a faint bluish lustre, the rest of the flagellum dark-brown. Mesosoma ( Fig. 26 ) with pronotum brown, without metallic lustre and a dark spot on lateral corner anterior to each spiracle; mesoscutum brown with some bluish or greenish reflections, axillae yellowish-brown, scutellum brighter yellow and contrasting with rest of mesosoma, tegula, dorsellum and propodeum brown, the latter with some metallic lustre, prepectus white, acropleuron and mesepisternum brown. Fore wing uniformly infuscate starting from parastigma and at base of basal cell, with a broad, well delimited lighter transverse cross-band behind apical half of marginal vein; venation brown with submarginal vein white except basally ( Fig. 25 ). Legs mostly dark brown, tarsi yellowish with darker apex, apex of fore tibia, base and apex of mid and apex of hind tibiae yellowish, with pale ring at base of hind tibia continuing along ventral side for half-length of tibia. Metasoma with Mt1 brownish, Mt2 and Mt3 translucent, whitish, except Mt2 brown basally and becoming gradually paler toward apex, Mt4–Mt8 light brown with faint metallic lustre under some angles. Ovipositor sheath unicolorous brown, but slightly darkened toward base and apex.

Head dull, with fine reticulate sculpture on lower face; gena and temples imbricate-alutaceous, with area behind malar sulcus more polished; vertex from anterior ocellus and occipital area imbricate-coriaceous to alutaceous; frons and scrobal depression reticulate (mesh size in front of anterior ocellus slightly larger than an ommatidium, smaller elsewhere); scrobal depression shallow and wide, slightly bell shaped, imperceptibly merging into frons, in lateral view with bluntly angular lower parascrobal region ( Fig. 8 ); setae on frontovertex inconspicuous, those on lower face and lower parascrobal area short, white-translucent and adpressed. Frontovertex about 0.4× head width, with ocelli arranged in an obtuse triangle of about 100°. Eye inconspicuously microsetose with setae about as long as an ommatidium. Toruli with upper margin in line with lower orbit. Scape strongly curved in dorsal view, in outer view 4.75× as long as wide, almost parallel sided with ventral and dorsal margins slightly sinuous, and with a narrow ventral lamina of about one-fourth scape width; in outer view pedicel 1.8× as long as wide, F1 subquadrate, F2 1.5× as long as wide, and following segments gradually shortened and broadened toward clava, all longer than wide (F8 almost quadrate); clava about 2.8× as long as wide, about as long as three and a half apical funiculars; pedicel plus flagellum 1.4× HW. Relative measurements: HW 34, FV 13, HL 18, HH 27, EL 18, EW 14, MS 11, LOL 2.5, OOL 2.5, POL 5, MPOD 3, SL 19, SW 4.

Pronotum medially divided, finely reticulate, with a line of about 8 erect setae along posterior margin and less conspicuous setae scattered over dorsal surface; mesoscutum with conspicuous translucent short setae over entire surface, with convex anterior lobe imbricate-coriaceous anteriorly to reticulate posteriorly, lateral lobes imbricatealutaceous (dorsal surface of latter with very small mesh size), carinate in posterior quarter, and median depressed area finely reticulate mesally with elongated cells, smooth in rest, with an area of longitudinal rugae in front of anterior angle of scutellum. Axillae obliquely imbricate-alutaceous with narrow cells, appearing strigose, with anterior edge in same plane as scutellum base, convexly sloping posteriorly, each with about 8 semierect setae; scutellum convex, imbricate-alutaceous with narrow elongated cells, appearing striate basally, semicircularly strigose-reticulate posterodorsally, and posterior surface with gradually effaced sculpture, dorsally with 4 inconspicuous, erect setae. Dorsellum with a narrow, linear median lobe covering extreme apex of scutellum. Propodeum with plical depression as wide as plical region, plical region wide, anteriorly with nearly linear carina and posteriorly with broadly ∩-shaped carina; callar region conical and delimited by deep callar furrow, with sparse, long white setae in outer half, with a moderately large spiracle about as long as a posterior ocellus but narrower and separated from anterior margin by distance equal to its own smallest diameter. Acropleuron anteriorly with conspicuous white setae, mostly below prepectus, alutaceous except with effaced reticulate sculpture mostly along median area; mesepisternum alutaceous, with sparse white setae along acropleural sulcus. Hind coxa finely alutaceous, with sparse, translucent setae mostly along ventral margin of outer surface. Mesotibia with 6 inconspicuous apical pegs. Fore wing 3.3× as long as wide; basal cell entirely conspicuously setose; costal cell with a few setae basally on ventral side and with a single median line of dense, short, setae; distal end of costal cell and parastigma with longer, darker setae than rest of the disc, which is evenly covered with thick setae gradually shortening toward wing apex, setae on light areas translucent, those on darkened areas brown; venation with short thick uncus and undifferentiated stigma ( Fig. 40 ), cc: mv: stv: pmv: uncus: u-pmv = 6: 7.5: 1: 2: 0.25: 0.75. Relative measurements: MSL 57, MSCL 27, MSCW 22, SCL 15, SCW 10.5, AXW 7, AXL 8, FWL 83, FWW 25, cc 24, mv 30, stv 4, pmv 8, uncus 1, u-pmv 3, HWL 72, HWW 12, MT 39, HT 34.

Metasoma with terga alutaceous, sparsely setose on sides; Mt7 reticulate-polished with pinprick-like punctures bearing short erect setae; Mt2 and Mt3 emarginate medially, Mt4 and Mt5 only slightly emarginate; Mt7 covering Mt8 (syntergum) up to dorsally facing anal sclerite. Ovipositor sheath slightly longer than hind tibia length. Relative measurements: MTL 69, MTW 30, OL 35.

MALE. Length 1.25 mm. Head and mesosoma ( Fig. 30 ) primarily dark brown with bright violet and blue reflections. Maxillary and labial palpi whitish. Antenna brown with some violet and blue lustres under some angles on scape, pedicel and basal funicular segments. Wings translucent with light brown venation. Legs yellowish white with coxae and following regions brown: mid femur except base and apex, hind femur, a wide subapical ring on hind tibia, and last two tarsomeres ( Fig. 30 ). Metasoma brown with faint dark blue and violet metallic lustres under some angles of light.

Head finely coriaceous to imbricate-coriaceous on occipital area, with numerous semierect short setae uniformly distributed except in antennal scrobes; scrobal depression with strongly effaced sculpture, shallow, wideovoidal, delimiting a broad parascrobal region, and without a depression at upper limit. Frontovertex about 0.4× head width, with ocelli arranged in an equilateral triangle and with a short subocellar sulcus. Eye finely microsetose, with setae about as long as an ommatidium. Toruli with ventral margin in line with lower orbit; scape slightly curved in dorsal view, in outer view 2.7× as long as wide, oval; in side view pedicel 1.6× as long as wide, F1 anelliform, inconspicuous, F2 1.5× as long as wide, and following segments all short petiolate, longer than wide, and subequal to F2; clava tapered to apex and about 3× as long as wide, slightly shorter than combined length of apical three funiculars; pedicel plus flagellum 1.32× HW. Relative measurements: HW 25, FV 13, HL 12, HH 20, EL 12, EW 10, MS 6, LOL 3, OOL 2, POL 7, MPOD 2.5, SL 8, SW 3.

Thorax with conspicuous translucent setae dorsally; pronotum with a weakly sclerotized median line, finely imbricate-coriaceous; mesoscutum with deep notauli and rather uniform coriaceous sculpture; axillae coriaceous; scutellum coriaceous on sides and alutaceous medially, with narrow and elongate cells. Dorsellum narrow, linear. Propodeum smooth with a blunt median carina and a few sparse setae laterally. Hind coxa smooth, finely coriaceous, with bare outer surface and a few setae along ventral margin. Fore wing 2.2× as long as wide, entirely setose except extreme base, behind mediocubital fold, and with small indistinct area of sparser setae behind parastigma; venation with long uncus and stigma not enlarged ( Fig. 30 ), cc: mv: stv: pmv: uncus: u-pmv = 4.2: 3.8: 1: 2.1: 0.4: 0.4. Relative measurements: MSL 37, MSCL 13, MSCW 19, SCL 12, SCW 10, AXW 7, AXL 7, FWL 59, FWW 27, cc 19, mv 17, stv 4.5, pmv 9.5, uncus 2, u-pmv 2, HWL 45, HWW 10.

Metasoma in dorsal view ovoidal, with wide base; terga coriaceous and sparsely setose. Relative measurements: MTL 40, MTW 20.

VARIABILITY. The female paratype is very similar to the holotype except for relative measurements. Length about 2.5–3 mm (specimen contorted, with arched mesosoma). HW 40, FV 15, HL 21, HH 35, EL 22.5, EW 16, MS 11, LOL 3, OOL 2.5, POL 6.5, MPOD 3.5, SL 23, SW 5, MSCW 30, FWL 99, FWW 28, cc 27, mv 40, stv 4.5, pmv 7, uncus 1, u-pmv 6, HWL 85, HWW 20, MT 48, HT 44, MTL 85, MTW 33, OL 50.

RECOGNITION. A conspicuous species with females having a characteristic fore wing and body color pattern and males being bright violet with very short antennae. Females also have Mt8 (syntergum) covered by Mt7 up to the dorsally facing anal sclerite as in R. koreana .

BIOLOGY. Unknown.

DISTRIBUTION. United Arab Emirates. Because the south of the Arabian Peninsula is included in the Afrotropical area, this species is most probably Afrotropical and not really a Palaearctic element. It is included in the present work because its presence is possible in the neighboring territories that belong to the Palaearctic ecozone.

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.