Orthocentrus mirabilis Varga & Di Giovanni, 2025

Orthocentrus mirabilis Varga & Di Giovanni sp. nov.

Fig. 6 View Figure 6

Material examined.

Holotype. Ukraine • ♀; Ivano-Frankivsk Region, Mochary, 5 km NE of Bogorodchany ; 48.8371N, 24.5814E; 315 m a. s. l.; 09 Apr. 2024; O. Varga leg.; mixed forest, sweeping; SIZK GoogleMaps . Paratype s. Belgium • 1 ♀; Waals-Brabant, Ottignies ; 03–10. Sep. 1982; P. Dessart leg.; Malaise trap; RBINS ; • 1 ♀; Somal , fauché, chemin humide en friche, reboisement en cours [ sweeped with net, fallow wet path, reforestation in progress]; 27 Nov. 2013; P. - N. Liebert leg.; LC ; • 1 ♀; Ieper, De Triangel ; 50.8427, 2.8840; 14–28 May 2022; F. Verheyde leg.; Malaise trap B; RBINS GoogleMaps ; • 1 ♀; idem, but 23 July – 06 Aug. 2022; RBINS GoogleMaps . Italy • 1 ♀; Veneto – TV, Cessalto – Bosco Olmè ; 45°41'57.42"N, 12°37'4.92"E; 23 July – 05 Aug. 2013; F. Di Giovanni leg.; Malaise trap 213; FDG GoogleMaps ; • 1 ♀; Gaiarine, loc. Produttiva Francenigo, Bosco Otello ; 45°51'36.96"N, 12°29'28.08"E; 23 July – 05 Aug. 2013; F. Di Giovanni leg.; Malaise trap; FDG GoogleMaps ; • 1 ♀; Friuli-Venezia Giulia – UD, Precenicco – Bosco Bando ; 45°46'37.32"N, 13°3'50.04"E; 08–18 May 2013; F. Di Giovanni leg.; Malaise trap 179; FDG GoogleMaps ; • 1 ♀; Piemonte – CN, Roddi, loc. Ravinali ; 09 Aug. – 09 Sep. 2016; Loni-Scaramozzino leg.; TM 4; SIZK . • 1 ♀; Emilia-Romagna – BO, Sasso Marconi, Palazzo Rossi ; 08 Mar. 2010; L. Colacurcio leg.; FDG . Poland • 1 ♀; Podlaskie Voivodeship, Biebrza National Park, Grobla Honczarowska, mineral island Pogorzały ; 21 Sep. 2006; A. Kostro-Ambroziak leg.; oak-linden-hornbeam forest, birch with alder, yellow pan trap « c »; SIZK . Sweden • 1 ♀; Bl, Ronneby kommun, Tromtö nabb. ; 56.149067, 15.480017 (= TrapID 23); 12–27 Aug. 2004 (= coll. event ID 1013); Swedish Malaise Trap Project leg.; beech and oak forest; NHRS -HEVA 000025137 ; NHRS GoogleMaps ; • 2 ♀♀; Up, Håbo kommun, Biskops-Arnö, northern beach ; 59.672133, 17.500850 (= Trap ID 8); 27 Aug. – 10 Sep. 2004 (= coll. event ID 1562); Swedish Malaise Trap Project leg.; elm grove; NHRS -HEVA 000025138 , NHRS -HEVA 000025139 ; NHRS GoogleMaps ; • 1 ♀; Uppsala kommun, Ekdalens naturreservat ; 59.971517, 18.354983 (= Trap ID 27); 07–21 July 2003 (= coll. event ID 466); Swedish Malaise Trap Project leg.; tall herbs and young trees mixed with old oaks; NHRS -HEVA 000025140 ; NHRS GoogleMaps ; • 1 ♀; Ög, Ödeshögs kommun, Omberg, Bokskogsreservatet ; 58.297183, 14.634817 (= Trap ID 16); 08 Aug. – 08 Sep. 2004 (= coll. event ID 962); Swedish Malaise Trap Project leg.; beech forest; NHRS -HEVA 000025141 ; NHRS GoogleMaps .

Diagnosis.

Orthocentrus mirabilis sp. nov. is characterized by the combination of the following: face sparsely punctate, with traces of granulation; eye glabrous (Fig. 6 B View Figure 6 ); antenna with 26–27 flagellomeres, first flagellomere 3.0–3.1 × as long as wide (Fig. 6 C View Figure 6 ); vertex yellow along inner orbits (Fig. 6 D View Figure 6 ); mesosoma largely marked with orange and yellow, scutellum orange (Fig. 6 C, E View Figure 6 ); fore wing with vein 3 rs-m present, areolet petiolate; hind wing with nervellus intercepted below the middle (Fig. 6 F View Figure 6 ); metasomal tergites strongly longitudinally wrinkled on smooth and shiny background, banded with yellow posteriorly (Fig. 6 G, H View Figure 6 ); first tergite 1.4–1.5 × as long as posterior width, with lateromedian longitudinal carinae strong; second tergite 1.0–1.1 × as long as posterior width, with deep transverse furrow (Fig. 6 G View Figure 6 ).

Orthocentrus mirabilis sp. nov. differs from all known Western Palaearctic species with a yellow vertex by the strongly longitudinally wrinkled metasoma. Orthocentrus mirabilis sp. nov. is similar to the Korean O. flavescens Humala & Lee, 2020 , but differs by the longer antenna with 26–27 flagellomeres ( 20 in O. flavescens ) and the fore wing with vein 3 rs-m present (absent in O. flavescens ).

Description.

Female. Holotype. Body length 5 mm. Fore wing 3.5 mm.

Head weakly sculptured and densely pubescent. Antenna with 27 flagellomeres, first flagellomere 3.1 × as long as wide. Face about 0.7 × as long as wide, sparsely punctate, weakly granulate between punctures, sparsely pubescent; inner orbits divergent ventrally. Malar space 3.3 × basal width of mandible; subocular sulcus distinct. Clypeus 0.5 × as long as wide, fused with face, apical margin weakly truncate. Mandible strongly bent outward, lower tooth not visible due to mandible position. Temples strongly narrowed in dorsal view; head 1.9 × as wide as high in dorsal view. Frons and vertex weakly granulate; length of ocellar-ocular distance about 1.0 × maximum diameter of lateral ocellus; occipital carina absent.

Propleuron densely pubescent. Pronotum smooth; epomia absent. Mesoscutum densely pubescent; notauli deep anteriorly; scutellum densely pubescent. Mesopleuron smooth and densely pubescent on anterior half; epicnemial carina present ventrally and laterally, reaching anterior margin of mesopleuron. Metapleuron smooth, densely pubescent along margins; pleural and submetapleural carinae present. Propodeum smooth, with lateral longitudinal, lateromedian longitudinal and posterior transverse carinae present.

Legs relatively stout; hind femur 3.1 × as long as wide, third tarsomere of hind tarsus about 0.8 × as long as fifth tarsomere; tarsal claws simple.

Fore wing with vein 2 rs-m about 1.0 × distance between 2 rs-m and 2 m-cu; vein 3 rs-m present, partly unpigmented; vein 1 cu-a weakly distal to M & Rs; hind wing with nervellus intercepted below middle, more or less vertical, distal abscissa of Cu largely unpigmented.

First metasomal tergite 1.5 × as long as posterior width, longitudinally wrinkled, smooth and shiny; latero-median longitudinal carinae strong; lateral oblique grooves present. Second tergite 1.1 × as long as posterior width, longitudinally wrinkled, with deep transverse furrow; thyridium small. Tergites 3–4 same structure and sculpture as previous tergite. Fifth tergite more weakly sculptured on anterior 0.8, with transverse furrow absent. Sixth tergite densely pubescent and smooth. Ovipositor very short, not strongly projecting beyond apex of metasoma, its sheath slightly widened and pubescent.

Colour. Head largely yellow except antenna, frons, vertex and gena partly black. Mesosoma black except propleuron and pronotum largely yellow, meso- and metapleuron largely orange and yellow, mesoscutum with narrow orange stripes, scutellum orange. Fore and mid coxae, trochanters and trochantelli yellow, fore and mid femora, tibiae and tarsi orange; hind legs orange except trochanters and trochantelli, tibia basally and tarsomeres largely yellow. Metasoma black except tergites 1–5 posteriorly banded with yellow.

Male. Unknown.

Etymology.

The new species is named after the relatively colourful body in comparison to the other European species of the genus. Adjective.

Distribution.

Currently known from Belgium, Italy, Poland, Sweden, Ukraine (this study), and erroneously reported as O. castellanus from UK ( Galsworthy 2022),? Germany ( Riedel et al. 2021), and? South Korea ( Humala et al. 2020) (see Discussion).

Remark.

The colour of the mesosoma varies from largely yellow and orange ventrally and on the mesoscutum to black with only some yellow marks on the pronotum and mesopleuron, but the scutellum is always orange or brownish, and thus at least slightly paler than mesoscutum.