Wilkinsonellus rugiscutum Liu & Polaszek, 2025
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publication ID |
https://doi.org/10.3897/zookeys.1240.153121 |
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publication LSID |
lsid:zoobank.org:pub:F26CA819-AAFC-4377-8965-BDE7DFE7ABBB |
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DOI |
https://doi.org/10.5281/zenodo.15602356 |
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persistent identifier |
https://treatment.plazi.org/id/4AC0F081-955C-5747-ADC7-A9541C6D1670 |
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treatment provided by |
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scientific name |
Wilkinsonellus rugiscutum Liu & Polaszek |
| status |
sp. nov. |
Wilkinsonellus rugiscutum Liu & Polaszek sp. nov.
Fig. 5 View Figure 5
Diagnosis.
Body 3.7 mm long, bright yellow (Fig. 5 a View Figure 5 ); OOL: OD = 0.4 (Fig. 5 b View Figure 5 ); face wider dorsally (Fig. 5 e View Figure 5 ); antenna with 1 st and 2 nd flagellomeres equal in length and 2.6 × longer than wide (Fig. 5 a View Figure 5 ); mesoscutum with notauli; scutellar sulcus with six carinae inside (Fig. 5 b View Figure 5 ); scutellum with rugulose punctures, distinctly above level of propodeum with a spine apically in lateral view; propodeum 2.0 × wider than high, spiracles enclosed by costulae anteriorly and posteriorly (Fig. 5 d View Figure 5 ); mesopleuron with dense rugulose punctures except narrowly polished above sternaulus (Fig. 5 c View Figure 5 ); vein r 1.4 × 2 - SR (Fig. 5 f View Figure 5 ); metacoxa areolate-rugose on outer dorsal edge, with weaker sculpture laterally and ventrally (Fig. 5 c View Figure 5 ); petiole of T 1 strongly constricted medially, 12.5 × longer than medial width; T 2 trapezoid, smooth with shallow longitudinal grooves delimiting a median field that is indistinctly wider posteriorly; T 3 0.9 × as long as T 2 (Fig. 5 g View Figure 5 ); ovipositor sheath directed downwards (Fig. 5 c View Figure 5 ).
Description.
Female. Body length 3.7 mm, fore wing length 3.8 mm (Fig. 5 a View Figure 5 ).
Head. 2.0 × as wide as long, 1.2 × slightly wider than mesoscutum. Eyes 4.6 × longer than temple in dorsal view. Temple dull, with dense punctures, strongly constricted behind eyes in dorsal view. Vertex with shallow punctures excluding foveate areas along outside edge of posterior ocelli, a shallow depression present behind ocelli. Ocelli large, distance between fore and a posterior ocellus 0.4 × as long as minor axis of a posterior ocellus, POL: OD: OOL = 1.0: 2.3: 1.0. Frons slightly depressed, nearly polished (Fig. 5 b View Figure 5 ). Face little shiny, indistinctly bulging medio-longitudinally, 0.8 × as wide as high, with dense punctures, their intervals uneven. Clypeus 2.3 × wider than medial length, nearly smooth. Length of malar space as long as width of mandible (Fig. 5 e View Figure 5 ). Antenna with 1 st and 2 nd flagellomeres equal in length and 2.6 × longer than wide, three apical flagellomeres missing (Fig. 5 a View Figure 5 ).
Mesosoma. Length: width: height = 1.8: 1.2: 1.0. Mesoscutum dull with dense punctures, notauli indicated by slightly rugose punctures, intervals narrow, ridge-like. Scutellar sulcus wide and straight with six carinae inside (Fig. 5 b View Figure 5 ). Scutellum dull, with rugulose punctures, distinctly above level of propodeum with a spine apically in lateral view (Fig. 5 b, c View Figure 5 ). Propodeum 2.0 × wider than high, a little shiny with strong percurrent medio-longitudinal carina and adjacent oblique carinae with thinner carinae at sides; spiracles large, enclosed by costulae anteriorly and posteriorly (Fig. 5 d View Figure 5 ). Mesopleuron not shiny, with dense rugulose punctures except narrowly polished above sternaulus, the latter weakly crenulated and with an oblique furrow attaching right-angled to its anterior end (Fig. 5 c View Figure 5 ).
Wings. Fore wing: pterostigma narrow, 3.6 × as long as its widest part; vein 1 - R 1 1.2 × length of pterostigma; vein r arising from apical third of pterostigma, 1.4 × longer than maximum width of pterostigma, 1.4 × 2 - SR; vein m-cu 0.7 × as long as 2 - SR + M, about half of 2 - SR; vein 1 - CU 1 0.3 × 2 - CU 1 and as long as cu-a (Fig. 5 f View Figure 5 ). Hind wing: vannal lobe of normal size, posterior margin with short setae medially, basal and apical with longer setae, cu-a nearly straight.
Legs. Metacoxa just surpassing T 3, areolate-rugose on outer dorsal edge, with weaker sculpture laterally and ventrally (Fig. 5 c View Figure 5 ). Metafemur 3.5 × as long as its widest part. Inner spur of metatibia 4 / 5 length of metabasitarsus. Metabasitarsus 0.8 × as long as combined length of tarsomeres 2–5 (Fig. 5 a, c View Figure 5 ).
Metasoma. Nearly as long as length of mesosoma. Petiole of T 1 smooth, strongly constricted medially, 2.7 × longer than basal width, 12.5 × longer than medial width, petiole with a groove reaching to anterior half of apical swollen area. T 2 trapezoidal, smooth, with shallow, longitudinal grooves delimiting a median field that is indistinctly widened posteriorly, 1.3 × as wide as length in the middle. T 3 0.9 × as long as T 2, T 3, and posterior tergites smooth and softer (Fig. 5 g View Figure 5 ). Hypopygium somewhat broad, hardly exceeding apex of metasoma. Ovipositor sheath slightly protruding beyond metasoma, pointing downwards, almost glabrous (Fig. 5 c View Figure 5 ).
Colour. Body bright yellow (Fig. 5 a View Figure 5 ). Palpi white. Tibia spurs pale yellow. Antenna yellow-brown to dark brown. Fore and middle legs light yellow, hind leg yellow except black on macula of apical coxa, apical 2 / 5 of metafemur, apical 1 / 3 of metatibia and dark brown to yellow-brown on metatarsus. Wing membranes hyaline, indistinctly infumate, fore wing with pterostigma brown, veins pale brown to brown.
Male. Unknown
Host.
Unknown.
Material examined.
( NHMUK) Holotype • 1 ♀; Malaysia, Selangor, Serdang Carambola Farm ; xi. 1979; Gauld, Khashiyah; NHMUK 010826369 About NHMUK .
Distribution.
Malaysia (Selangor).
Etymology.
The specific name rugiscutum derives from the Latin “ rugosus ” and “ scutum ”, referring to the rugose punctate mesoscutum.
Remarks.
This species is similar to W. longicentrus , but differs in the following: fore wing with vein 1 - CU 1 shorter, 0.3 × 2 - CU 1 (1 - CU 1 longer, over half length of 2 - CU 1 in W. longicentrus ); POL shorter, less than half length of OD (POL longer, nearly as long as OD in W. longicentrus ); and petiole of T 1 longer, 12.5 × longer than medial width (petiole shorter, at most 5 × longer than medial width in W. longicentrus ). It also resembles W. amplus from the Oriental region being pale in colour, but it can be easily differentiated from the latter by the black maculae on the apical metacoxa, and hind leg with less rugosity on lateral-dorsal part of metacoxa.
| NHMUK |
Natural History Museum, London |
No known copyright restrictions apply. See Agosti, D., Egloff, W., 2009. Taxonomic information exchange and copyright: the Plazi approach. BMC Research Notes 2009, 2:53 for further explanation.
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