Parancistrocerus guangxiensis Li & Carpenter, 2019

Li, Tingjing & Carpenter, James M., 2019, Descriptions of eight new species of the genus Parancistrocerus Bequaert (Hymenoptera: Vespidae: Eumeninae), with a key to the Oriental species, Zootaxa 4551 (3), pp. 251-274 : 263

Parancistrocerus guangxiensis Li & Carpenter , sp. nov.

( Figs 26–32 )

Material examined. Holotype, 1♀, China, Guangxi Zhuang Autonomous Region, Cenxi City, Malu Town , Lingyao Village , 10.VI.2016, Zhenxia Ma & Yan Peng, 22°52'54.5"N, 110°49'02.7"E, No. 1004109 ( CQNU) . Paratype: 1♀, China, Guangxi Zhuang Autonomous Region, Yulin City , Rong County, Ganwang Village , 22°37'08.6"N, 110°44'45.3"E, 8. VI .2016, Zhenxia Ma & Yan Peng, No. 10041010 ( CQNU) .

Diagnosis. This species is similar to P. loharbandensis Girish Kumar & Carpenter from India by having the occipital carina incomplete, evanescing at the vertex ( Fig. 28 ). It differs from P. loharbandensis and other congeners by the following combination of characters: clypeus yellow ( Fig. 27 ), T1 sparsely punctate ( Fig. 26 ), and punctures at the median subapex of T2 denser than remainder of T2 ( Fig. 32 ).

Description. Female ( Fig. 26 ). Body length 7.0 mm. Head 1.09× as wide as long in frontal view; clypeus ( Fig. 27 ) convex excluding apex, apex moderately emarginated forming two lateral teeth, apical width 0.96× distance between antennal sockets, maximum width of clypeus 1.15× its length medially, with sparse punctures; frons, vertex and tempora with dense punctures, punctures on frons relatively denser than vertex and tempora; POL 1.11× OOL; distance between anterior and posterior ocelli 1.14× as long as anterior ocellus; distance between two posterior ocelli 2.13× as long as posterior ocellus; cephalic foveae degenerate, unobvious; interocular distance on vertex 1.59× that at clypeus; occipital carina incomplete, just present laterally ( Figs 26, 28 ).

Median sloping area of anterior face of pronotum polished and with two deeply connected foveae mesally, lateral sides sparsely punctate, pronotal carinaabsent dorsally and present laterally ( Fig. 28 ); pronotum, mesoscutum and scutellum coarsely punctate ( Fig. 26 ), punctures somewhat sparser than those on frons and vertex of head; median length of mesoscutum 1.05× as long as its maximum width; metanotum with strong and large punctures, interspaces carinate and somewhat dentiformed; mesopleuron closely punctured except large area of epicnemium with pubescenceand posterior margin coriaceous; epicnemial carina present; dorsal face of propodeum ( Fig. 30 ) forming horizontal area behind midline of metanotum, and with large punctures, interspaces strongly carinate and reticulate; posterior face of propodeum concave and finely striate, with strong and longitudinal median carina; lateral sides of propodeum punctate; supermarginal carina of propodeum well-developed and lamellate, separating dorso-lateral face from posterior face; submarginal carina strongly projecting as a lobe above propodeal valvula. Tegula smooth with minute punctures, evenly rounded posteriorly, emarginate adjoining parategula, and slightly shorter than apex of latter posteriorly.

T1 ( Fig. 29 ) with strong transverse carina separating vertical face from dorsal face; vertical anterior face of T1 shorter than dorsal horizontal face; vertical face of T1 punctate on upper part; dorsal face of T1 sparsely punctate, 1.45× as wide as its median length, with about 3 irregular rows of punctures at yellow band; punctures of T2 relatively denser than those of T1 ( Fig. 32 ), punctures at the median subapex much denser, T2 with wavy apical yellow band, about two irregular rows of punctures at yellow band; T2 1.35× as wide as its median length; maximum width of T2 slightly larger (1.10×) than that of T1; T2 not reflexed at apex, with apical margin normal, not prolonged mesally; S2 ( Fig. 31 ) convex basally, very weakly depressed after; following metasomal segments normal.

Body black. Following parts yellow: mandible basally, clypeus excluding apical margin, ocular sinus, small median spot on lower part of frons, band on tempora, scape ventrally, anterior band on dorsal surface of pronotum, spot on top of mesepisternum, tegula (except median brown area), parategula, metanotum, apexes of fore and mid femora, almost all tibiae, and apical bands on T1, T2 and S2; brown to dark brown parts: apex of mandible, apical margin of clypeus, tegula except yellow spots, and all tarsi.

Male. Unknown.

Distribution. China (Guangxi).

Etymology. The name guangxiensis is a reference to the type locality of the species: Guangxi.

Figures

FIGURES 26–32. Parancistrocerus guangxiensis sp. nov., holotype, ♀. 26. Habitus, dorsal view; 27. Clypeus; 28. Head and pronotum, dorsal view; 29. T1, dorsal view; 30. Propodeum, dorsal view; 31. S2–S5, ventral view; 32. T2–T4, dorsal view.