Sceliotrachelus midgleyi van Noort, 2021

Noort, Simon van, Lahey, Zachary, Talamas, Elijah J., Austin, Andrew D., Masner, Lubomir, Polaszek, Andrew & Johnson, Norman F., 2021, Review of Afrotropical sceliotracheline parasitoid wasps (Hymenoptera, Platygastridae), Journal of Hymenoptera Research 87, pp. 115-222: 115

publication ID

http://dx.doi.org/10.3897/jhr.87.73770

publication LSID

lsid:zoobank.org:pub:7137A82A-62E3-4958-A48C-B05BEA80FE60

persistent identifier

http://treatment.plazi.org/id/8AB1E6FC-F7FA-41BE-B197-9DCE71CD4322

taxon LSID

lsid:zoobank.org:act:8AB1E6FC-F7FA-41BE-B197-9DCE71CD4322

treatment provided by

Journal of Hymenoptera Research by Pensoft

scientific name

Sceliotrachelus midgleyi van Noort
status

sp. nov.

Sceliotrachelus midgleyi van Noort   sp. nov.

Figs 42 View Figure 42 , 43 View Figure 43 , 44 View Figure 44 , 45 View Figure 45 , 46 View Figure 46 , 47 View Figure 47 , 48 View Figure 48 , 49 View Figure 49

Material examined.

Holotype: South Africa • ♀; Eastern Cape, Asante Sana Game Reserve, Zuurkloof ; 32°17.092S, 25°00.521E; 1204 m; 18-25 Nov 2009; J. Midgley; T2S1c; Pitfall trap; Camdeboo Escarpment Thicket; Acacia   thicket; next to river bed with larger trees; SAM-HYM-P046650 ( SAMC). GoogleMaps  

Paratypes: South Africa • 3♀♀, 1♂   ; Eastern Cape, Asante Sana Game Reserve, buttress between Waterkloof and Zuurkloof ; 32°16.932S, 24°58.795E; 1401 m; 18-25 Nov 2009; J. Midgley; T1S1e; Pitfall trap; Camdeboo Escarpment Thicket, Open habitat, low shrubs and mat forming wild carnation, scattered grass; SAM-HYM-P036025A-D ( SAMC) GoogleMaps   • 1♀ idem except for SAM-HYM-P038230 ( SAMC) GoogleMaps   • 4♀♀; idem except for SAM-HYM-P046654 ( SAMC) GoogleMaps   • 1♂; Asante Sana Game Reserve, Zuurkloof ; 32°17.099S, 25°00.527E; 1207 m; 18-25 Nov 2009; J. Midgley; T2S1e; Pitfall trap; Camdeboo Escarpment Thicket; Acacia   thicket; next to river bed with larger trees SAM-HYM-P036026; SAM-HYM-P046646; SAM-HYM-P046649 ( SAMC) GoogleMaps   • 2♀♀; Asante Sana Game Reserve, Zuurkloof ; 32°16.461S, 25°00.067E; 1406 m; 18-25 Nov 2009; J. Midgley; T2S2c; Pitfall trap; Camdeboo Escarpment Thicket; Mixed thicket with some small shrubs and larger trees; sparse grass; SAM-HYM-P036028 ( SAMC) GoogleMaps   • 2♀♀; 1♂; idem except for SAM-HYM-P046648 ( SAMC) GoogleMaps   • 1♂; Asante Sana Game Reserve, buttress between Waterkloof and Zuurkloof ; S 32 17.003 E 24 58.298; 1202 m; 18-25 Nov 2009; J. Midgley; T1S5d; Pitfall trap; Camdeboo Escarpment Thicket; Acacia   thicket; stony ground; SAM-HYM-P036030 ( SAMC)   • 1♂; Asante Sana Game Reserve, Waterkloof ; 32°15.692S, 24°57.095E; 1415 m; 18-25 Nov 2009; J. Midgley; T3S1d; Pitfall trap; Camdeboo Escarpment Thicket; Mixed grass (low mat forming and tall) and small trees SAM-HYM-P036031 ( SAMC) GoogleMaps   • 1♀; Asante Sana Game Reserve, Zuurkloof ; 32°16.011S, 25°00.244E; 1621 m; 18-25 Nov 2009; J. Midgley; T2S3d; Pitfall trap; Camdeboo Escarpment Thicket; Tall grass stands with scattered oubos and scattered other shrubs; SAM-HYM-P036032 ( SAMC) GoogleMaps   • 1♀; Asante Sana Game Reserve, buttress between Waterkloof and Zuurkloof ; 32°16.934S, 24°58.801E; 1400 m; 18-25 Nov 2009; J. Midgley; T1S1d; Pitfall trap; Camdeboo Escarpment Thicket; Open habitat; low shrubs and mat forming wild carnation; scattered grass; SAM-HYM-P036033 ( SAMC) GoogleMaps   • 1♀; Asante Sana Game Reserve, Zuurkloof ; 32°16.463S, 25°00.062E; 1407 m; 18-25 Nov 2009; J. Midgley; T2S2d; Pitfall trap; Camdeboo Escarpment Thicket; Mixed thicket with some small shrubs and larger trees; sparse grass; SAM-HYM-P036034 ( SAMC) GoogleMaps   • 2♀♀; Asante Sana Game Reserve; buttress between Waterkloof and Zuurkloof ; 32°16.363S, 24°58.989E; 1793 m; 18-25 Nov 2009; J. Midgley; T1S3e; Pitfall trap; Camdeboo Escarpment Thicket; Steep rocky slope; dense shrubs (50 cm high) little to no grass; SAM-HYM-P040038 ( SAMC) GoogleMaps   • 1♂; Asante Sana Game Reserve, buttress between Waterkloof and Zuurkloof ; 32°16.580S, 24°58.942E; 1618 m; 18-25 Nov 2009; J. Midgley; T1S2a; Pitfall trap; Camdeboo Escarpment Thicket; Steep slope; mostly small shrubs; fynbos; with some grass tussocks; SAM-HYM-P046643 ( SAMC) GoogleMaps   • 1♂; Asante Sana Game Reserve, Zuurkloof ; 32°16.462S, 25°00.054E; 1413 m; 18-25 Nov 2009; J. Midgley; T2S2e; Pitfall trap; Camdeboo Escarpment Thicket; Mixed thicket with some small shrubs and larger trees; sparse grass; SAM-HYM-P046644 ( SAMC) GoogleMaps   • 2♂♂; idem except for SAM-HYM-P046645 ( SAMC) GoogleMaps   • 1♀; 1♂; Asante Sana Game Reserve, Waterkloof ; 32°16.994S, 24°56.311E; 1205 m; 18-25 Nov 2009; J. Midgley; T3S6e; Pitfall trap; Camdeboo Escarpment Thicket; Acacia   thicket; SAM-HYM-P046647; SAM-HYM-P046655 ( SAMC) GoogleMaps   • 1♀; Asante Sana Game Reserve, buttress between Waterkloof and Zuurkloof ; 32°16.370S, 24°58.986E; 1805 m; 18-25 Nov 2009; J. Midgley; T1S3c; Pitfall trap; Camdeboo Escarpment Thicket; Steep rocky slope; dense shrubs (50 cm high) little to no grass; SAM-HYM-P046651 ( SAMC) GoogleMaps   • 1♀; Asante Sana Game Reserve, Zuurkloof ; 32°16.462S, 25°00.084E; 1412 m; 18-25 Nov 2009; J. Midgley; T2S2a; Pitfall trap; Camdeboo Escarpment Thicket; Mixed thicket with some small shrubs and larger trees; sparse grass; SAM-HYM-P046652 ( SAMC) GoogleMaps   • 1♀; Asante Sana Game Reserve, Waterkloof ; 32°16.993S, 24°56.325E; 1197 m; 18-25 Nov 2009; J. Midgley; T3S6c; Pitfall trap; Camdeboo Escarpment Thicket; Acacia   thicket; SAM-HYM-P046653 ( SAMC) GoogleMaps   .

Description.

Female body length: 2.26 mm; male body length: 2 mm. Colour of head and mesosoma black; metasoma dark brown to black, with lighter brown areas anteriolaterally; scape, pedicel, flagellar segments in female, legs orange-brown; flagellar segments in male dark brown; foamy structures pale yellow; wings yellow-white with broad darker band in apical half.

Head 1.27 × wider than long, strongly narrowing towards toruli and clypeus; eye height 0.9 × inter-ocular distance; malar space 0.55 × eye length; antennal length ratios (female): scape 14, pedicel 2.5, funicle 5.5, clava 10; male antennae filiform: scape 15, pedicel 4, flagellum 35; LOL:OOL:POL (4:7:7); hyperoccipital carina present, collared, without occipital pit, long setae present.

Mesoscutum. Sculpture of mesosoma polished; pronotum transverse, strongly delta-shaped with medial longitudinal sulcus, with anteriorly projecting neck, covered in scattered long brown setae; shoulders angular, flat in lateral view; mesoscutum short 2.3 × wider than long medially; 1.3 × medial length of pronotum and equivalent to scutellar length; admedian depressions short, deep grooves, not overlapping longitudinally with posterior narrow and more shallow notauli, which are widely spaced; median mesoscutal line present; notaular excavations align with two deep and long parallel excavations of the axillular carina, which meet with the scutoscutellar sulcus, itself not widened; mesoscutellar disc medially and longitudinally evenly raised into hump; axillar carinae present and strongly raised; axillae weakly and evenly excavated; posterior margin of mesoscutellum not raised in lateral view; propodeum with foamy structures extending to T1; mesopleuron polished, dorsally with two complete transverse ridges; not longitudinally compressed, 1.9 × higher than long; mesopleural carina strong, curled dorsally; foamy structures present posteriorly on metapleuron, concealing metapleural carina, metapleuron ventrally with dense patch of white setae; fore wing brachypterous, not extending beyond posterior margin of T2, narrow > 4 × longer than wide, curved forwards in boomerang-shape; submarginal vein of fore wing absent except at base, narrow and almost glabrous with scattered microtrichiae for basal third, dense microtrichiae present over distal two-thirds; hind wing with marginal vein absent, except for basal remnant, anterior margin angled at hamulus, narrow and almost glabrous with scattered microtrichiae for basal half, dense microtrichiae present over distal half.

Metasoma. T1 transverse in dorsal view with dense row of setae on posterior margin overlapping T2; T2 large, as long as wide, 0.7 × metasomal length, with anterior transverse furrow 0.5 × length of T1, centrally situated, encompassing central three-quarters of anterior tergite width; T2 anteromedially polished grading into lateral strigulate areas, and posteriorly aerolate-rugulose.

Male as in female, except for antennal configuration: eight funicular segments, first 1.3 × as long as second and third combined; second to seventh subequal in length, 2 × longer than wide; ultimate segment longer than penultimate segment.

Diagnosis.

This species is immediately distinguishable by the brachypterous wings, which have a unique colour pattern, are extremely narrow, 4 × longer than wide, and do not extend beyond the posterior margin of tergite 2. It shares the lack of the occipital pit, presence of long setae on the pronotum, and presence of strong microtrichiae with S. braunsi   , but does not have rugae present on the genae and pronotum as in S. braunsi   ; has a wider mesoscutum (twice as wide as long, as opposed to 2.5 × in S. braunsi   ); a distinctive mesoscutellar disc which is square in shape and medially and longitudinally evenly raised into a hump, laterally defined by strongly raised longitudinal axillar carinae; and the costal margin of hind wing is not sclerotized as in S. braunsi   .

Etymology.

Named in honour of John Midgley, who first collected specimens of the new species as part of his PhD project. Noun in the genitive case.

Distribution and habitat association

(Fig. 50 View Figure 50 ). This species is currently only known from the Eastern Cape Province where it is associated with high altitude regions (1197-1805 m) across a variety of micro-habitats present in Camdebo Escarpment Thicket (Grassland biome), including open grassland, grassland with mixed thicket, mixed thicket with some small shrubs, larger trees and sparse grass, to Acacia   thicket with medium or tall trees, either on steep rocky slopes or in flatter areas next to river courses. This vegetation type is restricted to the Eastern Cape Province. The following vegetation distributional summary was extracted verbatim from Mucina and Rutherford (2006):

Camdebo Escarpment Thicket (south-sloping face of the Great Escarpment, forming an arc from Bruintjieshoogte in the east via the Coetzeeberg Mountains and Graaff-Reinet (including Spandaukop and the isolated Rooiberg) to Kamdebooberg and Aberdeen in the west; altitude varies from 570-1600 m, with most of the area between 700-1200 m).

The current distribution is likely to be an artefact of under-sampling and the species is expected to be more widespread in the Eastern Cape, but possibly restricted to higher altitudes in Camdebo Escarpment Thicket.