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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 lapis
Online Access:	https://doi.org/10.5281/zenodo.19566551
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Sierola lapis sp. nov.urn:lsid:zoobank.org:act: 4DBCDA8C-1228-4BBD-BE6B-8D278527CC4AFigs 90, 105DiagnosisAn aberrant member of the compressa species group, with the head flattened and frons broad but mesosoma not compressed. Closest to S. medialis sp. nov. and S. planifrons sp. nov., separated by having the head rather narrow (WH/LH ~0.79), clypeus elongate in profile and semi-elliptical but very broad, and mandible yellow.EtymologyFrom the Latin ‘ lapis ’, ‘stone’, referring to the resemblance of the head to a skipping stone. It is a noun in apposition.Type materialHolotypeAUSTRALIA – Queensland • &female;; Coleman River; 14°48′ S, 143°22′ E; 26 Jun. 1993; I.D. Naumann and P. Zborowski leg.; ANIC 32-154843.ParatypeAUSTRALIA – Queensland • 1 &female;; same data as for holotype; ANIC.DescriptionFemaleHEAD. Clypeal process semi-elliptical, apex broadly rounded; dorsally with a low carina, distinctly visible only when viewed directly down towards mandibles; in profile elongate, evenly curved, apex acute. Mandible moderately broad, constricted just past articulation, gradually broadened towards apex; not twisted, at most weakly convex outwardly, outwardly coriaceous, somewhat dull; in ventral view evenly, moderately curved. Apex of mandible vertical, with equally strong teeth. Malar space almost absent. Dorsal setae of head distinctly longer than flagellar width. Frons with shallow punctures, dense near antennae, 2–3 pit widths apart posterior of midpoint of eyes. Vertex and gena setae conspicuous, nearly twice as long as setae of frons and stronger, erect and directed anterior. Frons microsculpture dull, granular. Vertex in dorsal view more or less straight; occipital margin broadly rounded. Lateral ocelli distinctly separate from vertex crest by less than ocellus length. Ocellar triangle anterior angle strongly acute. Head narrowed posterior to eyes. Eye setae short, only about as long as 1–2 ommatidia. Dorsum of head in lateral view nearly flat, head deepest on line through posterior margin of eye. Venter of head posterior to mandible convex in lateral view, with relatively sparse setae. Head nearly flat ventrally, genal angle absent. Side of head posterior to eye with a line of tesselate microsculpture extending from posteroventral margin of eye to vertex crest, distinctly different from smoother sculpting dorsally and ventrally. Gena ventral to eye convex; sculpture weakly microreticulate ventrally and posterolaterally, with broad band of tesselate-colliculate sculpture extending diagonally on each side from anterior margin of eye to posteroventral margin of head. Postgenal depression shallow, rounded. Antenna extending to pronotum.MESOSOMA. Anterior margin of dorsal pronotal area in lateral view evenly rounded. Pronotal setae longer than flagellar width. Propodeal disc laterally finely, weakly striate; 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, with faint microsculpture laterally. S4–6 each with a pair of moderately long erect setae, those on S6 twice as long as others. Sixth sternum broadly glabrous medially, with sparse setae laterally.COLOR. Body entirely dark brown to black. Antenna yellow, apical flagellomeres tinged with brown. Mandible yellow. Coxae and metafemur brown, other femora brown dorsally, legs otherwise yellow.WINGS. Membrane hyaline. Basal cells of fore wing densely and conspicuously setose. Cell 1M distinctly convex posteriorly, corner medioapical. Distal portion of vein Rs strongly curved, meeting anterior wing margin at oblique angle.MEASUREMENTS. LFW 1.92 mm; LM 1.02 mm; WH/LH 0.79; DH/LH 0.43; EV/HE 0.80; EV/WF 0.67; WF/HE 1.18; WH/WF 1.63; OOL/WOT 1.86; DM/LM 0.36; FL/FW 2.10; HFL/HFW 2.38; A3 L/ W 1.30; 2R1 L/ W 2.47.DistributionQueensland; known only from the holotype, collected far north.RemarksThis unusual species is probably related to S. planifrons sp. nov., sharing the robust mesosoma which is unlike the defining character of the compressa species group. However, the head is of the typical elongate, flattened shape, very similar to S. medialis sp. nov.

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