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Bibliographic Details
Main Author:	Magnacca, Karl
Format:	Recurso digital
Language:
Published:	Zenodo 2026
Subjects:	Biodiversity Taxonomy Animalia Arthropoda Insecta Hymenoptera Bethylidae Sierola Sierola vibrissoides
Online Access:	https://doi.org/10.5281/zenodo.19566996
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Sierola vibrissoides sp. nov.urn:lsid:zoobank.org:act: 6CF4A8F9-7EC6-409C-BB68-4B40B2B1C8CDFigs 204, 208DiagnosisPart of the vibrissata group, with very long, thick, bristly setae on the vertex and gena, antennal scrobes dorsally carinate, broadly flat in between with a low carina, and eyes large, head short posteriorly. Closest to S. vibrissata in having the long setae black, scrobes narrowing to a sharp carina on the anterior face of the clypeus, and vein Rs meeting the anterior wing margin. Distinguished by having the frons appearing dull due to scutellate microsculpture and with close punctation, about 1 pit width apart, and basal wing cells very densely setose, about five rows of setae in each.EtymologyReferring to the similarity of this species to S. vibrissata.Type materialHolotypeAUSTRALIA – Western Australia • &female;; Mt Cooke; 23 Dec. 1990 – 13 Jan. 1991; M. Harvey and J. Waldock leg.; Malaise trap; SAMA.ParatypesAUSTRALIA – Western Australia • 1 &female;; Pilbara, Mt Nameless; 22°43′10″ S, 117°44′58″ E; 31 May 2004; G. Carter and D. Britton leg.; mixed scrub, sweep sample, PILB147/03SW; AM K248031 • 1 &female;; Pilbara region, Nanutarra-Wittenoom Road, approx 13 km NE of Railway Road x-in, near fenceline; 22°26′8.8″ S, 117°49′56.2″ E; 22–27 Sep. 2005; CVA Volunteers leg.; LTM sites, Malaise trap, PILB 041/09M; AM K248056.DescriptionFemaleHEAD. Clypeal process semicircular (narrow, lateral lobes somewhat enlarged), apex rounded; flat with a low carina dorsally, narrowing to a sharp carina on anterior face; in profile weakly sloping dorsally but strongly rounded and recurved at apex. Mandible narrow, more or less parallel-sided except at base; not twisted, at most weakly convex outwardly, outwardly shining but with distinct, fine microsculpture; in ventral view evenly, moderately curved. Apex of mandible vertical, with equally strong teeth. Malar space 1/4 as long as width of base of mandible. Dorsal setae of head about as long as flagellar width or scarcely longer. Frons with shallow, close punctures, mostly about 1 pit width apart. Vertex and gena with two long, black, and bristle-like setae on each side. Frons microsculpture minutely scutellate, cellules shining but separated by conspicuous margins. Vertex in dorsal view more or less straight; occipital margin not carinate but forming a pronounced ridge. Lateral ocelli nearly touching vertex crest. Ocellar triangle anterior angle right. Head rounded shortly posterior to eyes. Eye setae short, only about as long as 1–2 ommatidia. Dorsum of head in lateral view slightly convex, head deepest on line through eye. Venter of head posterior to mandible convex in lateral view, with relatively sparse setae. Head weakly convex ventrally, genal angle absent. Side of head posterior to eye distinctly angulate, rounded carina with distinct tesselate microsculpture extending from posteroventral margin of eye to vertex crest. Gena ventral to eye concave; sculpture weakly microreticulate posterolaterally, coriaceous ventrally, with broad band of tesselate-colliculate sculpture extending diagonally from anterior margin of eye to posteroventral margin of head (weakly differentiated from ventral sculpture). Postgenal depression absent. Antenna extending to posterior margin of pronotum.MESOSOMA. Anterior margin of dorsal pronotal area in lateral view evenly rounded. Pronotal setae about as long as flagellar width or scarcely longer. Propodeal disc laterally coarsely rugulose; median carina absent; transverse carina absent, brow of declivity broadly rounded; metapleural carinae complete. Profemur robust, about twice as long as wide and strongly convex dorsally, with both anterior and posterior surfaces convex, not strongly compressed, more or less straight in dorsal view.METASOMA. Shining, apical tergites laterally punctate and with faint microreticulation. S3–5 each with a pair of long erect black setae near posterior margin. Sixth sternum glabrous medially, with a mix of long and short setae laterally.COLOR. Body entirely dark brown to black. Antenna with scape dark brown basally, yellow to orange apically, flagellum brown dorsally and yellow ventrally. Mandible black. Coxae and femora brown, tibiae, tarsi, and trochanters yellow.WINGS. Membrane weakly infuscate. Basal cells of fore wing very densely setose, with five or more rows of setae in cell R. Cell 1M weakly convex posteriorly, corner posteroapical. Distal portion of vein Rs nearly straight, meeting anterior wing margin at right angle.MEASUREMENTS. LFW 1.57 mm; LM 0.87 mm (0.78–0.87); WH/LH 0.86 (0.84–0.88); DH/LH 0.52 (0.52–0.53); EV/HE 0.30 (0.30–0.35); EV/WF 0.38 (0.38–0.39); WF/HE 0.78 (0.78–0.89); WH/WF 1.92 (1.72–1.92); OOL/WOT 0.93 (0.93–1.11); DM/LM 0.36; FL/FW 1.85 (1.78–1.85); HFL/HFW 2.27 (2.10–2.32); A3 L/ W 1.25 (1.11–1.25); 2R1 L/ W 3.20. N = 3.DistributionWestern Australia; known only from three specimens.RemarksThe Pilbara paratypes have the frons slightly broader and slightly coarser sculpture of the frons and metasoma (the latter with microreticulation extending onto the dorsal surface of tergites), but match the holotype in the close punctation and dense wing setae.

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