A new genus of Chalcidoidea (Hymenoptera) from Chile with challenging taxonomic position Author Gumovsky, Alex 0000-0003-0646-3631 Schmalhausen Institute of Zoology, 15 Bogdan Khmelnitsky St., 01601 Kyiv- 30, Ukraine & School of Animal, Plant and Environmental Sciences, University of the Witwatersrand, Johannesburg, South Africa entedon @ gmail. com; gumovsky @ izan. kiev. ua; https: // orcid. org / 0000 - 0003 - 0646 - 3631 entedon@gmail.com text Zootaxa 2023 2023-03-09 5254 1 133 141 http://dx.doi.org/10.11646/zootaxa.5254.1.8 journal article 10.11646/zootaxa.5254.1.8 1175-5326 7711015 7F8D6856-9387-4581-98E2-459AEFBD8603 Lautaroderus malalcahuello Gumovsky , sp. n. Figs 1–3 Description. FEMALE. Length 3.2 mm . Body green-bronze with violet tint on posterior parts of notauli and on lower face; gaster brownish; legs (including tarsi) and antennae dark metallic ( Figs 1–3 ). Fore wing widely darkened, veins of wings dark brown ( Figs 1A‒C ). Head in dorsal view about 2.2× as wide as long; POL nearly 2.0× OOL, and OOL about 2.3× MDO. Head in frontal view ( Figs 2B , 3G ) about 1.4× as wide as high; toruli with ventral margins situated 1/2 diameter of torulus above virtual line connecting lower margins of eyes ( Fig. 2B ). Face faintly reticulate, with area above clypeus smooth ( Fig. 2C ). Eyes with inner margins subparallel ( Fig. 2B ). Gena evenly curved ( Fig. 2C ). Malar sulcus complete ( Figs 2B‒D ). Mouth opening about 1.8× as wide as malar space. Anterior margin of clypeus and labrum both with four setae ( Fig. 2C ). Antenna ( Fig. 2E ) with scape about 3.5× as long as wide; pedicel about 2.0× as long as wide; an1 very thin, strongly transverse; an2 1.7× as wide as long, and about 3.0× shorter and 1.5× narrower than F1; F1–F4 about 1.3× as long as wide; club about 2.8× as long as wide and 2.6× as long as F4, with segments separated by sutures and deep constrictions, and terminal spine long, about ¼ length of club. Mesosoma about 1.5× as long as wide, shallowly reticulate ( Fig. 2A ). Pronotum in dorsal view ( Figs 2A , 3G ) short, conical, its collar present as a narrow strip, collum short, evenly sloping ( Figs 1B , 3G ). Mesoscutum ( Fig. 2A ) nearly 2.0× as wide as long; mesoscutellum slightly longer than wide and slightly longer than mesoscutum, its surface alutaceous except its extreme margin smoother ( Fig. 2A ). Axilla with 3 bristles. Mesopleuron with deep femoral depression and straight, sulcate transepimeral sulcus ( Figs 3A, C ). Metanotum wide, with metascutellum about 0.35× (1/3) as long as mesoscutellum ( Figs 1D, E , 2A ). Metapleuron subrectangular, coarsely reticulate. Fore wing approximately 2.0× as long as wide, slightly longer than body ( Figs 1A–C ); subcosta of SMV broken at juncture with parastigma, with 5 dorsal bristles; MV about 1.4× as long as costal cell and about 0.7× wing width; STV with long petiole, drop-shaped stigma, and relatively long uncus; PMV about 1.3× as long as STV; marginal fringe short, about 0.5× as long as STV and about 1.5× as long as width of MV at its widest part. Calcar about as long as width of fore tibia ( Fig. 3D ); midtibial spur about 2.0× as long as width of mid tibia; hindtibial spur about as long as width of hind tibia ( Figs 3C–F ). Propodeum ( Figs 1D, E ) coriaceous-reticulate, its submedian areas elevated, with robust median carina which fades posteriorly and with wide supracoxal flange bearing septae; propodeal callus with 12 setae. Metasoma as long as mesosoma ( Figs 1A–C ); petiole transverse, reduced. Gaster in dorsal view about 1.5× as long as wide ( Fig. 1C ); Gt 1 with slightly elevated anterior areas bearing about 10 sparse setae; posterior margin of tergites straight ( Fig. 3B ) and with bristles starting from Gt 3 ( Fig. 3B ); syntergum (Gt 7 ) with a membranous lobe apically, with cercus short and with 3 setae. MALE. Unknown. Biology. Unknown. Distribution. Chile , Malleco Province. Material examined. HOLOTYPE ♀ (NHMUK), Chile : Malleco Province , 6 km , E Malalcahuello , 1080 m ., xii.1982 , A. Newton & M. Thayer (also, ‘aberrant EULOPH[ID]’ with Zdeněk Bouček’s handwriting). Etymology. The species name is in honor of the collection area, the Malalcahuello national reserve situated in the pre-Andean plain in the La Araucania region of Chile .