Euodynerus (Euodynerus) carinatus Ma, Chen & Li, 2017

Ma, Zhenxia, Chen, Bin & Li, Tingjing, 2017, Four new species of Euodynerus Dalla Torre, 1904 (Hymenoptera: Vespidae: Eumeninae) from China, with a key to the Chinese species, Zootaxa 4300 (2), pp. 245-258 : 247-248

1. Euodynerus (Euodynerus) carinatus Ma, Chen & Li , sp. nov.

(Figs 1–9)

Material examined. Holotype, 1♀, China, Sichuan prov., Liangshan Yi Autonomous Prefecture , Dechang County, Cida Village , 27°11'23.64"N, 102°04'58.15"E, 1711 m, 2.VI.2011, Tingjing Li, No. 1004078 ( CQNU) . Paratypes: 2♂, the same data as holotype, Nos. 1004079, 1004080 ( CQNU) .

Diagnosis. This species is similar to E. (E.). dantici by cephalic fovea comparatively larger, its width somewhat more than distance between posterior ocelli (Fig. 7), apex of T2 with strongly deep and dense punctures (Fig. 8), and S2 strongly convex (Fig. 9). It differs from E. (E.). dantici and other congeners by clypeus (Figs 4–5) distinctly longer than its width in both sexes, clypeus of female (Fig. 4) with extremely strong longitudinal carinae (weaker in E. (E.). dantici (Figs 10–11)), cephalic fovea with dense setae, in male apex of F11 bent backward reaching base of F8 (Fig. 6), and volsella of male genitalia wide, but narrowed apically (wide apically in E. (E.). dantici , (Fig. 14).

Description. Female. Body length 8.5 mm, forewing length 8.1 mm. Clypeus (Fig. 4) weakly convex at basal half, with strong longitudinal carinae, lateral surface with sparse setae, width 0.86 × length, apex almost truncated, ratio total width: apical width = 1.18: 0.44; frons densely and strongly punctate and reticulate, punctures on vertex sparser and shallower than those on frons; frons and vertex with yellow setae, setae on frons somewhat longer than those on vertex; ocellar triangle usual; cephalic fovea comparatively larger (Fig. 7), its width more than distance between posterior ocelli, with large punctures and dense setae laterally, and micropunctures and sparse setae medially.

Masosoma densely and strongly punctate and reticulate, punctures distinctly larger than those on the head; punctures on mesepisternum somewhat weaker than those on pronotum, mesoscutum, scutellum, and metanotum; punctures on propodeum distinctly larger and sparser than those on other parts of the masosoma (Fig. 1). Anterior surface of pronotum shiny, with few minute punctures, pronotal carinae completely and moderately developed; mesoscutum and mesepisternum normal; scutellum slightly convex; metanotum with narrow horizontal surface and much longer vertical one, posterior margin of horizontal surface with large denticles, lower half of vertical surface impuncate and shiny; dorsal surface of propodeum behind metanotum without teeth, posterior surface concave with long and transverse rugae, and median longitudinal carina; tegula with minute and sparse punctures, posteriorly distinctly curved inwards.

In dorsal view, T1 width 1.60 × its length and 0.91 × T2 width, with semitransparent apical lamella, weakly punctate, punctures distinctly sparser and smaller than those on frons and mesosoma; T2 without distinct lamella apically, punctures somewhat denser than those of T1, apex with deeper and denser punctures than on other parts of T2; S2 strongly convex, with short median longitudinal furrow basally, punctures larger than those on T2; visible parts of T3–T6 and S3–S6 with minute punctures.

Black; following parts yellow: triangular spot of mandible basally, basal band on clypeus (Fig. 4), interantennal spot, band along inner eye margin extending from behind of scape to ocular sinus, and post-ocular spots; scape ventrally, pair of linear spots on pronotum, spot on tegula posteriorly, parategula, apex of femur to terminal tarsi, and apical band on T1–T3 pale ferruginous (Fig. 1); wings brown.

Male. Body length 9.2 mm, forewing length 8.0 mm. Sculpture, punctuation, setae and coloration (all spots of body yellow) similar to those of female except follows: whole clypeus (Fig. 5) and pair of spots on scutellum yellow; mark in eye incision, inter-antennal spot and pronotal band larger than those in female; clypeus (Fig. 5) slightly convex medially, with small punctures, only apical portion with weakly longitudinal carinae, width of clypeus 0.90 × its length, ratio total width: apical width = 1.3: 0.45, apical emargination deeper than that in female, ratio width: depth of emargination = 0.45: 0.06; apex of F11 bent backward reaching the base of F8 (Fig. 6); in dorsal view, width of T1 1.70 × its length and 0.91 × T2 width; punctures on metasoma distinctly stronger and deeper those in female; T2 with extremely narrow reflex apical lamella, row of deep and dense punctures forming narrow transverse groove on base of lamella (Fig. 8); male genitalia as in Fig. 3, apical tip of penis valve rounded, volsella wide and narrowing apically, and with long setae, parallel spines elongate without setae; other characters same as those in female.

Distribution. China (Sichuan).

Etymology. The specific name carinatus is the Latin adjective, which refers to the clypeus with longitudinal carinae.

FIGURES 1–9. Euodynerus carinatus sp. nov., 1, 4, 7, holotype, ♀; 2–3, 5–6, 8–9, paratype, ♂. 1, 2. Habitus, dorsal view; 3. Genitalia, ventral view; 4, 5. Clypeus; 6. Apical flagellomeres, lateral view; 7. Head, dorsal view; 8. T2, apex; 9. Metasoma, ventral view.