Gwesped groehni, Brazidec & Legendre & Perrichot, 2023

Brazidec, Manuel, Legendre, Frederic & Perrichot, Vincent, 2023, Diversity and phylogeny of the extinct wasp subfamily Lancepyrinae (Hymenoptera, Bethylidae) revealed by mid-Cretaceous Burmese amber, Arthropod Systematics & amp; Phylogeny 81, pp. 345-369 : 345

Gwesped groehni sp. nov.

Figs 3 , 4

Etymology.

The specific epithet is a patronym honouring Carsten Gröhn, who generously made the specimen available for study. The specific epithet is to be treated as a noun in the genitive case.

Material studied.

Holotype GPIH.5068, a complete female; housed in the Carsten Groehn amber collection (under CCGG no. 11341) of the Leibniz Institute for the Analysis of Biodiversity Change, Hamburg, Germany (GPIH).

Type locality and horizon.

Noije Bum, Hukawng Valley, Kachin State, northern Myanmar; late Albian-early Cenomanian, ca. 99 Ma, mid-Cretaceous.

Diagnosis.

As for genus.

Description.

Body depressed and poorly pubescent (length 3.82 mm). - Head prognathous, quadrate, about as long as wide, with metallic reflections; LH: 0.65 mm, WH: 0.56 mm; WF: 0.39 mm, HE: ca. 0.19 mm; frons flat, slightly punctate; compound eye rounded, located anteriorly on head; clypeus with median lobe only slightly projecting forward, lateral lobe poorly developed; antenna short, barely reaching pronotum posteriorly; scape 2.2 times as long as pedicel (length 0.20 mm); pedicel longer than flagellomeres 1-9; 10 flagellomeres, all compact, as long as wide; flagellomere tapering at apex, flagellomere 10 slightly longer than flagellomeres 1-9 (0.05 mm vs. 0.11 mm); occipital carina present. - Mesosoma narrow with dorsum smooth (length 1.56 mm); propleuron elongate, ‘neck-shaped’, visible dorsally; dorsal pronotal area narrower anteriorly, lateral margin slightly incurved, posterior margin straight; anteromesoscutum short, notaulus and parapsidal signum present; mesoscuto-mesoscutellar sulcus conspicuous, widely connecting lateral grooves; mesoscutellum subquadrate; metanotum developed, overlapping mesoscutellum posteriorly; metapectal-propodeal complex with metapostnotal median carina, lateral margin slightly outcurved, posterior corner with small lateral dentiform projection. Fore wing hyaline, posteriorly reaching fourth metasomal segment (LFW = 2.19 mm); C, Sc+R, M+Cu, 1A tubular; 1Rs and 1M aligned; cu-a slightly post-furcal to 1M; Rs+M tubular, reaching apex of pterostigma; pterostigma rounded; 2r-rs arising from distal half of pterostigma; 2r-rs&Rs tubular, reaching wing margin; [2R1] cell large; post-stigmal abscissa of R1 tubular for half-length of [2R1] cell. Legs slender; tibial spur configuration 1-2-2; tarsal claws slightly curved; arolium small. - Metasoma fusiform, smooth (length 1.61 mm); petiole relatively long, conspicuous; six tergites visible, convex; short sting exserted.

Figures

Figure 3. Gwesped groehni gen. et sp. nov., holotype female number GPIH. 5068. A habitus in dorsal view; B habitus in ventral view (arrow = sting); C head in dorsal view; D head in ventral view; E fore wing in dorsal view; F line drawing of fore wing. Scale bars: 1 mm (A, B, E, F); 0.5 mm (C, D). Note: The apparent structure at the apex of the metasoma is the result of a bubble formed in the amber, combined with some artifacts produced during the stacking process.

Figure 4. Line drawing of Gwesped groehni gen. et sp. nov., holotype female number GPIH. 5068. Scale bar: 1 mm.