Hyposoter horstmanni Galsworthy & Shaw & Haraldseide 2023, sp. nov.
Creators: name: Galsworthy, Anthony
name: Shaw, Mark R.
name: Haraldseide, Håkon
Publisher: name: Zenodo
Year: 2023
Subjects: Biodiversity
Taxonomy
Animalia
Arthropoda
Insecta
Hymenoptera
Ichneumonidae
Hyposoter
Hyposoter horstmanni

description: Hyposoter horstmanni Galsworthy & Shaw sp. nov.
(Figs. 11–13)
Diagnosis. Immediately recognisable by the unusual sculpture of the propodeum, with a broad area superomedia joined to the area petiolaris, completely lacking costulae, and uniformly granulate throughout. The colour of the metasoma is also distinctive, with the rather elongate second tergite entirely black, and the other tergites dark in the centre with a broad orange wash laterally. This coloration is shared with H. rufovariatus, which however has the seventh tergite entire.
Description (female). Fore wing length 5 mm.
Head: face slightly wider than long, unpunctured and covered with fine cellular microsculpture; clypeus rather narrow, shallowly convex, sculptured as face, but smooth towards apex and with a sharp, well-defined apical edge; mandibles narrowing only slightly; malar space about equal to basal width of mandibles; frons, vertex and temples sculptured as face, unpunctured; temples narrowing sharply behind eyes, and occiput precipitate behind ocelli; antenna very narrow, first flagellomere about 5.0x longer than wide, 30 flagellomeres.
Mesosoma: pronotum granulate, finely striate across depression, without epomia; mesoscutum and lower part of mesopleuron finely and uniformly granulate without punctures; notauli absent; speculum smooth and shining, but small; rest of upper mesopleuron finely striate; metapleuron finely rugose, contrasting with lower mesopleuron; propodeum sloping almost from base, finely granulate throughout; area basalis a very small, narrow triangle; area superomedia 5-sided, broadly elongate, seamlessly joined to egg-shaped petiolar area; costulae absent; legs rather narrow, especially femora; hind coxa uniformly granulate.
Wings narrow, 1 cu-a strongly postfurcal, areolet quadrangular and sessile, nervellus reclivous, slightly curved.
Metasoma: first segment of metasoma flattened at base and narrowed centrally; base smooth and shining, rest of petiole and postpetiole finely granulate; postpetiole curving outwards from petiole anteriorly, approximately rectangular, with a smooth patch at apex pointing forwards like a tooth; 2nd tergite about 2.0x as long as broad, finely granulate, as are remaining tergites; 7th tergite deeply incised; ovipositor length 1.3x depth of metasoma.
Colour: black; mandibles, palps and tegulae yellow; all coxae and hind trochanter dark brown; rest of legs orange, hind tibia with only faint darkening at extreme apex; tergites from 3 onwards with orange wash laterally; antenna uniformly dark brown.
Male: unknown.
Holotype: ♀, Ober-Harz, Torfhaus [Germany], ca 800m, 11.ix.1955, E. Bauer, Omorgus? nov. spec. ♀, sp. nov. 2 Horstm. (ZSM). Paratypes: 1♀, same data as holotype (ZSM). UK: 2♀, Easter Ross NH 4689, Mal. Tr. Native pinewood, 8.89, I. MacGowan, NMSZ 1992.144 ; 1♀, Rannoch, Perths, Native Pinewood, Mal. Trap, NN 5655, I. McGowan, 8.90, NMSZ 1992.002 ; 1♀, Loch Garten, Inv., Malaise Trap, Pinus and Betula, J.A. Owen, July 84 (all in NMS).
Biology: unknown; there is a probable association with old pine forest.
Remarks: identified as a new species by Horstmann.
description: Published as part of 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, pp. 1-73 in Zootaxa 5290 (1) on pages 46-48, DOI: 10.11646/zootaxa.5290.1.1, http://zenodo.org/record/7959256