Stenonartonia polybioides
Creators: name: Garcete-Barrett, Bolívar R.
Publisher: name: Zenodo
Year: 2011
Subjects: Biodiversity
Taxonomy
Animalia
Arthropoda
Insecta
Hymenoptera
Eumenidae
Stenonartonia
Stenonartonia polybioides

description: Stenonartonia polybioides (von Schulthess 1904)
(Figs 11, 25, 34, 38, 58, 67, 79, 89, 97, 111, 125, 139, 151, 161, 169, 178)
Nortonia polybioides von Schulthess 1904: 272, 279, 281 [lectotype (here designated), Ƥ, Peru, Callanga (ETHZ)], [examined].
Paranortonia polybioides: Giordani Soika 1941: 159, fig. 6.
Diagnosis and comments: S. polybioides is species peculiar for having a large bubble-like anterolateral scutellar “window”, one of the characters shared with S. hasyva, together with the much distorted male antennal tip and mid femur, as evidence of a complex axillary fossal atrium. The very wide clypeus, extremely reduced anterior metanotal band, relatively narrow propodeum with abundant thin oblique striae, and very slim metasomal segment 1 are some of the distinguishing features of this species.
Description. FEMALE. Color pattern. Orange yellow integument with black to blackish brown (especially lighter on vertex and legs) as follows: mandibular teeth; mandibular condyle; dorsum of scape; complex interconnected marking including the interocellar space, a submedial frontal mark (which are very thin just before reaching the antennal insertions) and the specialized area of the vertex; elongate supraocular triangle pointing mesoposteriorly; thin occipital band that splits, where the occipital carina starts, in a thick posterior stump and an anterior thin elongate drop-like arm; spot at the middle of the anterior pronotal face; short posterior L-shaped humeral line; mesoscutum except for the parategula and a submedial line; small subalar and sublobular marks; scrobal sulcus; large cup-shaped scutellar mark; thin anterior and posterior metanotal bands; mid propodeal channel; P-shaped anterior submedial mark; suffuse darkening on the submarginal sublateral dimples of the propodeum; dorsal line along mid and hind femora; inner line along hind tibia; a spot at the muscular insertion on T1; gradular ring on T2. Orange brown are: antennae, tegula at middle; lamellar areas of the scutellar-axillar complex; some important suffusion on mid and hind legs; some limited suffusion around the dark areas of the propodeum; T1 and T2 except for the apical band and a more or less extensive but diffuse yellow basal area; base of T2 to T6. Fore wing membrane hyaline grayish yellow, a bit darker along the costal region. Fore wing venation yellowish, a bit darker toward the wing base.
Measurements and proportions. Body length 11 mm. Wing length 12.7 mm. Clypeus 1.38 × wider than high and with its apical margin 1.3 × wider than the interantennal distance. T1 1.36 × longer than wide and 0.6 × as wide as T2. S1 elongate isoscelic, with gradually diverging straight sides: 1.28 × wider than its medial length and 1.02 × wider than its total length.
Structure. Clypeus very slightly convex, almost flat, without apical depression and with its apical margin straight and finely translucent. Head broadly rounded. Humeral angle not outstanding, right angled in frontal view. Pronotal carina hardly emarginated under the humeral angle. Parapsidal line very thin. Parategula foot-shaped. Scutellum with a large anterolateral translucent bubble-like “window”. Lateral axillary panel not projected porteromedially. Metanotum evenly convex, with very weak indications of toothed ridge. Posterior metapleural border marked by a very thin carina along its posterior fifth. Propodeum hardly convex and with flat sides. Submedial propodeal carina poorly elevated. Apical propodeal lamella retracted, not outstanding. T1 elongate, with rather straight and smoothly diverging sides, prominent spiracular tubercles, anterior declivity straight in side view, with the transverse carina ending straight at the level of the spiracle and with well marked transverse and longitudinal sulci. T1 to T5 and S2 to S5 with an extremely thin and translucent apical lamella.
Tegumental sculpture. Clypeus finely granulated and with very few fine scattered punctures. Head and mesosoma sub opaque, covered with abundant and moderately spaced piliferous micropunctation. Metasoma with denser micropunctation, even denser on terga and across sternal posterior margins. Frons, vertex, upper pronotal surface and mesoscutum covered with almost reticular macropunctation with rather convex intervals, which is slightly sparser on mesoscutum. Macropunctation much sparser on gena and pronotal side. Scutellum and upper mesepisternal plate covered with medium sized macropunctures separated by 0.5-1 diameter apart. Metanotum densely striatopunctate and with a reduced, hardly differentiated anterior crenate band. Lower mesepisternum covered with some few sparse macropunctures which are coarser and concentrate dorsoposteriorly. Mesepisternum finely and densely macropunctate on its dorsal three quarters. Metapleura and lateral propodeal surface almost free of macropunctures. Sublateral propodeal surface covered all over with abundant fine oblique striation and without evident macropunctation; some few macropunctures are visible just next to the lateral surface. Mid propodeal channel opaque and finely shagreened. T1 with some coarse and superficial macropunctures scattered over its anterior declivity and some finer ones scattered over its disc. T2 covered with very scattered, thin and superficial macropunctures which are suddenly coarser and moderately dense over the apical yellow band. T3 to T6 moderately densely macropunctured. S1 with some transverse weak rugae. S2 to S5 with scattered macropunctation gradually denser toward the posterior margin. S6 free of macropunctures. Apical lamella of terga and sterna free of punctures.
Pilosity. Clypeus almost bare, with just a few scattered microscopic setae. Face, vertex and most of thoracic dorsum covered with thin and dense fulvous pubescence (less evident on frons), mixed with abundant erect brownish setae. Metanotum, propodeum, lower face and sides of head and mesosoma covered with an even thinner whitish pubescence which is less evident on the head and longer on propodeum. Metasoma covered with a very short fulvous pubescence and some few setae which are erect on segment 1, decumbent on the following segments and tend to concentrate on the apical bands.
MALE. Differing from the female in: Color pattern. Scape not blackened above. Flagellum darker above and apically. Supraocular markings fused together with the interocellar marking. Anterior arm of the occipital band disconnected. Last tarsomere of mid and hind leg black.
Measurements and proportions. Body length 10 mm. Wing length 11.3 mm. Clypeus 1.23 × wider than high and with its apical margin 1.3 × wider than the interantennal distance.
Structure, tegumental sculpture and pilosity. General body shape more delicate and with a proportionally smaller head. F9 very concave ventrally. F11 very elongate, flattened and curved. Humeral angle sharper in frontal view. Mid femur distorted: flat behind and with a sharp carina along its front (forming a tooth in dorsal view) between a ventrobasal and a mesodorsal concavities; the latter one covered with long hairs. Propodeal striae a bit stronger. Propodeal sides flatter and with some evident macropunctures.
Type material. Lectotype Ƥ, PERU: Callanga, without further data [ETHZ]. Paralectotypes: same data as the lectotype [1 3: ETHZ]; without locality label: [1 Ƥ: MCNV].
Distribution. Peru: Cusco. This species is only known from the type series coming from “Callanga”, a place in the Yungas, around the Manu National Park (Rasmussen & Asenjo 2009). Ducke’s (1910) records of Stenonartonia polybioides from Iquitos (Peru) and Óbidos (Brazil) were based on individuals of S. cooperi.
Biology. The examined females have a mite on at least one of the axillary fossa openings. The male had mites in between the metasomal sterna.
description: Published as part of Garcete-Barrett, Bolívar R., 2011, A revision of the genus Stenonartonia Giordani Soika 1973 (Hymenoptera: Vespidae: Eumeninae), pp. 1-50 in Zootaxa 2868 on pages 10-12, DOI: 10.5281/zenodo.277490