Discoelius brevilamellatus Wang, Chen & Li, 2019

Wang, Hua-Chuan, Chen, Bin & Li, Ting-Jing, 2019, A new species and new record of the genus Discoelius Latreille, 1809 (Hymenoptera Vespidae: Eumeninae) from China, Zootaxa 4686 (2), pp. 297-300 : 297-299

publication ID

https://doi.org/ 10.11646/zootaxa.4686.2.11

DOI

https://doi.org/10.5281/zenodo.3691690

persistent identifier

https://treatment.plazi.org/id/822BD007-FFF1-252C-73A0-4CF53570F136

treatment provided by

Plazi

scientific name

Discoelius brevilamellatus Wang, Chen & Li
status

sp. nov.

Discoelius brevilamellatus Wang, Chen & Li , sp. nov.

( Figs 1–7 View FIGURES 1–7 )

Material examined. Holotype, 1 ♀, CHINA: Tibet, Changdu City, Mangkang County, Rumei Town , Jueba Village , 29°34′51″N, 98°18′12″E, 3240m, 23.VII.2014, Tingjing Li & Chunfa Chen GoogleMaps . Paratype: 1 ♀, same label as holotype.

Diagnosis. Female ( Fig. 1 View FIGURES 1–7 ). This species differs from other members of the genus by the following combination of characters: clypeus punctate and interspaces between punctures on lateral side somewhat striate ( Fig. 2 View FIGURES 1–7 ), dorsal surface of propodeum ( Fig. 6 View FIGURES 1–7 ) with thin longitudinal striae on the basal and lateral half and irregularly reticulate on the apical portion (dorsal surface of propodeum almost uniform and regularly reticulate in D. aurantiacus ) and T2–T4 with apical lamella short, not reflexed ( Fig. 7 View FIGURES 1–7 ).

Description. Female ( Fig. 1 View FIGURES 1–7 ). Body length 12.4–14.2 mm, fore wing length 11.2–12.2 mm. Black, with the following parts orange: two spots on the base of mandible and inner upper margin of antennal socket, large spot on apical half of clypeus, half of dorsolateral surface of pronotum, apical bands on both T1 and T2 ( Figs 1, 2 View FIGURES 1–7 ); wings brown, veins dark brown ( Fig. 1 View FIGURES 1–7 ).

Head. Head in frontal view as wide as high ( Fig. 2 View FIGURES 1–7 ), with brown setae and dense punctures, length of setae about 2× as long as posterior ocellar diameter ( Fig. 3 View FIGURES 1–7 ); mandible with four teeth; clypeus punctate and interspaces between punctures on lateral side somewhat striate, 1.5× as wide as high, its apical margin almost truncated, width of truncation 0.3× width of clypeus between inner eye ( Fig. 2 View FIGURES 1–7 ); gena as wide as eye; punctures on vertex and gena slightly sparser than those on frons; occipital carina developed at lateral side ( Fig. 3 View FIGURES 1–7 ); antennal scape with small punctures, 2.7× as long as its width, A3 1.1× as long as its maximum width, A4–A11 wider than long, A12 bullet-shaped ( Fig. 4 View FIGURES 1–7 ).

Mesosoma. Mesosoma about 1.5× as long as wide, with setae and punctures; pronotal carina complete, pronotum with coarse punctures, its lateral low surface with weak striae ( Fig. 5 View FIGURES 1–7 ); mesoscutum in lateral view weakly convex ( Fig. 5 View FIGURES 1–7 ), with dense punctures and area between punctures slightly striate ( Fig. 1 View FIGURES 1–7 ); notaulix complete, posterior area between the notaulices weakly punctate ( Fig. 1 View FIGURES 1–7 ); tegula smooth on center portion, its anterior and posterior lobes punctate, and its posterior lobe sharp and developed exceeding parategula posteriorly; scutellum with medial longitudinal furrow and punctures ( Fig. 6 View FIGURES 1–7 ); dorsal portion of mesopleuron coarsely punctate and area between punctures more or less carinate and ventral one sparsely punctate and area between punctures smooth ( Fig. 5 View FIGURES 1–7 ); metapleuron with weak and oblique striae in dorsal portion and without distinctly striae and punctures in ventral one ( Fig. 5 View FIGURES 1–7 ); propodeum dull, bearing lateral carina, with densely longitudinal and thin striae on basal half of dorsal surface and irregularly reticulate striae on apical half, posterior surface with median longitudinal carina and irregular striae ( Fig. 6 View FIGURES 1–7 ), and its lateral surface with dense, weak and oblique striae ( Fig. 5 View FIGURES 1–7 ).

Metasoma. T1 with coarse punctures, those on lateral side denser and bigger, and interspaces between punctures somewhat striate ( Figs 1, 7 View FIGURES 1–7 ), T1 about 2× as long as its maximum width, widening at one-fifth of the tergum from base, in lateral view abruptly swollen from near base; apexes of T2–T4 with very short lamellae, not reflexed ( Fig. 7 View FIGURES 1–7 ); T2 about 1.1× as long as wide dorsally, punctures on T2 minute and distinctly smaller than those of T1, those on basal portion dense and then gradually sparser from base to apex, T2 not petiolate at base ( Figs 1, 7 View FIGURES 1–7 ); punctures on S2 larger than those on T2, and those on lateral portion slightly denser; punctures on T3–T6 slightly larger than those on T2.

Variation. S2 with apical interrupted band in paratype.

Male. Unknown.

Distribution. China (Tibet).

Remarks. This species is allied to D. aurantiacus Nguyen, 2016 from Vietnam by similar color pattern, mesoscutum with dense punctures ( Fig. 1 View FIGURES 1–7 ), and T 1 in lateral view abruptly swollen from near base.

Etymology. The specific name brevilamellatus is from the Latin brev- (= short) + lamellatus (= lamella), which refers to T2 – T4 with apical short lamellae.

Kingdom

Animalia

Phylum

Arthropoda

Class

Insecta

Order

Hymenoptera

Family

Eumenidae

Genus

Discoelius

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