Hyposoter flaviventer Galsworthy & Shaw, 2023

Galsworthy, Anthony, Shaw, Mark R. & Haraldseide, Håkon, 2023, A key to European species of Hyposoter Förster, 1869 (Ichneumonidae: Campopleginae) with descriptions of 18 new species, and notes on all included species, Zootaxa 5290 (1), pp. 1-73 : 45

Hyposoter flaviventer Galsworthy & Shaw sp. nov.

( Figs. 9 , 10)

Diagnosis. Easily distinguished from other species with all black metasoma and pale second metasomal sternite by its finely granulate propodeum, for the most part lacking clear carinae. The second and third sternites are a strikingly bright orange-brown, strongly contrasting with the intense black of the rest of the metasoma.

Description. Wing length 6.0 mm.

Head: face and clypeus finely granulate; clypeus broad and convex, apex rounded, sharp; mandibles rather broad, tapering only at teeth, flange extending to base of teeth; malar space about two thirds basal width of mandible; frons, vertex and temples sculptured as face; hypostomal carina meeting oral carina close to base of mandible; antenna narrow and tapered, 31 flagellomeres.

Mesosoma: mesoscutum finely granulate, matt; scutellum contrasting, with much reduced sculpture and rather shining, rounded and convex, carinae present only anteriorly; speculum faintly granulate, very shining; rest of upper half of mesopleuron shining with reticulate sculpture; lower part of mesopleuron more strongly granulate, with close set punctures; metapleuron granulate, but shiny, with punctures conspicuously further apart; propodeum strongly granulate and matt; carinae strong only around triangular area basalis, front two sides of pentagonal area superomedia, and inner parts of costulae, elsewhere only faintly traceable.

Wings narrow; 1 cu-a interstitial; areolet small, stalked, rectangular; nervellus slightly curved.

Metasoma: petiole parallel-sided, expanding smoothly at apex to very convex postpetiole, latter about as broad as long; postpetiole finely granulate; glymma unusually deep; remainder of upper surface of metasoma with very fine close-set punctures, 2nd tergite matt, the rest more shining; 2nd tergite elongate, tergites 3–5 slightly elongate to quadrate, other tergites transverse; tergite 7 entire; ovipositor equal to depth of metasoma at apex.

Holotype: ♀, [ Germany], Sieber , Harz distr. 97–98, 30.8.1951, [red label] 634, [in Horstmann’s hand] Hyposoter sp. nov. cf. insulator ♀ ( ZSM). Note: the head of the holotype specimen has been detached and glued on again, the glue covering part of the temples and most of the pronotum.

Remarks. Horstmann had identified this as an undescribed species, and included it in his draft key, with the intention of describing it. Although it is known only from the unique holotype, it does appear sufficiently distinctive to warrant description, and we have therefore included it here. Its biology is unknown.

Figures

FIGURES 6–9. 6: Hyposoter albosignatus sp. n. Lateral habitus. 7,8: Hyposoter flavicoxa sp. n. Habitus: 7 lateral, 8 dorsal. 9,10: Hyposoter flaviventer sp. n. Habitus: 8 lateral, 9 dorsal.