Gwesped, 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 gen. nov.

Type species.

Gwesped groehni sp. nov.

Etymology.

The genus name is taken from the word for ‘wasp’ in the regional Breton language (Brittany, northwestern France). Gender feminine.

Diagnosis.

Female. Body flattened (Fig. 3A, B ); head quadrate, about as long as wide, with metallic reflections; frons punctate; compound eye round, located on anterior half of head; antenna short; 10 flagellomeres compact (Fig. 3C, D ); mesosoma narrow; propleuron visible dorsally; dorsal pronotal area narrower anteriorly; notaulus and parapsidal signum present; mesoscuto-mesoscutellar sulcus widely connecting lateral grooves; metanotum overlapping mesoscutellum posteriorly; metapostnotal median carina present; lateral margin of metapectal-propodeal complex outcurved, posterior corner with small lateral dentiform projection (Fig. 3A ); fore wing with Rs+M tubular and long; pterostigma rounded; 2r-rs&Rs completely tubular (Fig. 3E, F ).

Systematic remarks.

Following the key to the genera of Lancepyrinae of Jouault et al. (2021), our specimen would key to Burmapyris due to the fore wing with Rs+M tubular, long, extending distally to [1M] cell. It differs from that genus, however, by the body generally depressed, the head quadrate, the flagellomeres compact, the fore wing with 2r-rs&Rs fully tubular and lateral dentiform projections on the posterior corners of the metapectal-propodeal complex. It differs from Azepyris gen. nov. by the head quadrate, the eyes rounded, the flagellomeres compact and the fore wing with 2r-rs&Rs completely tubular. Therefore, we propose the new genus Gwesped gen. nov. to accommodate this morphotype.

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.