Tiphia (Jaynesia) rotunda Han, Chen & Li, 2021

Han, Qian, Chen, Bin & Li, Ting-Jing, 2021, Three new species of the subgenus Jaynesia Allen, 1969 of the genus Tiphia Fabricius, 1775 (Hymenoptera: Tiphiidae: Tiphiinae) from China, with a key to all known species, Zootaxa 4970 (2), pp. 313-324 : 320-321

Tiphia (Jaynesia) rotunda Han, Chen & Li , sp. nov.

( Figs 22–30 )

Diagnosis. This species can be recognized by the following combination of characters: posterior margin of tegula without transverse impressed line ( Fig. 25 ), lateral carina of propodeum obsolete ( Fig. 26 ), S1 ( Fig. 28 ) without lateral groove on posterior half, and T2 1.7× wider than long and its lateral margin rounded ( Fig. 22 ).

Material examined. Holotype, ♂, China, Gansu prov., Zhangye City, Linze County, Xinhua Town , Xiaoquanz- itan Village , 39°2′48″N, 99°9′35″E, 1394 m, 27.VI.2019, Xue Zhang ( CNU).

Description. Male ( Fig. 22 ). Body length 5.27 mm. Forewing length 4.0 mm. Black with erect long whitish setae, with flagellum, tegula, tibiae, tarsi, pterostigma and wing venation brown; mandible reddish brown; coxae and femora dark brown; wings translucent ( Figs 22–23, 25 ).

Head. Mandible without distinct medial transverse groove, at most with obsolete intermittent impressed line; W: OW: L: IOD=40: 16: 21: 25; OOD: POD: Od=12: 13: 6; AOD: WAS: IAD: CL: CAW=26: 20: 11: 25: 18; clypeus ( Fig. 23 ) with dense punctures and evenly distributed, ventral margin medially convex and slightly emarginated in middle, lateral margin convex, without thickened; frons ( Fig. 23 ) without one medial longitudinal narrow groove or carina; upper frons with sparse punctures; lower frons with denser punctures; vertex ( Fig. 24 ) with sparse and small punctures on lateral side of ocellus, postocellar area relatively smooth, rare punctures, upper anterior-ocellus with sparse and small punctures, with interspaces smooth.

Mesosoma. Pronotal dorsal face with sparse and small punctures, almost evenly spaced ( Fig. 25 ); pronotal lateral face ventrally with dense oblique striae; mesoscutum with notaulus and dense punctures; mesopleuron with dense and minute punctures; metanotal trough and metascutellum with sparse and small punctures ( Fig. 26 ); lateral carina of propodeum obsolete, and posteriorly with short striae connecting transverse carina; propodeal areola slightly convergent posteriorly, APWL=1.58: 0.9: 1.63, medial longitudinal carina reaching posterior 1/2 of areola; surface of propodeal areola medially flat and smooth ( Fig. 26 ); propodeal lateral face anteriorly with long dense oblique wrinkles, posteriorly with dense and minute punctures, without short medial longitudinal carina; tegula ( Fig. 25 ) smooth, with erect long whitish setae on its anterior and inner margin, without transverse impressed line; forewing ( Fig. 22 ) with pterostigma, and apex of marginal cell not exceeding the second submarginal cell.

Metasoma. T1 ( Figs 22, 27 ) with sparse punctures, subposterior groove with a row of minute punctures; S1 ( Fig. 28 ) smooth and impunctate, and without posterolateral groove and medial carina; T2 ( Fig. 22 ) 1.7× wider than long, and its lateral margin rounded, anteriorly with transverse row of short longitudinal striae; T1–T7 with erect long whitish setae; T2–T6 with sparse punctures ( Fig. 22 ); T1–T6 posteriorly with thin lamellae; posterior margin of S2–S5 with sparse recumbent long whitish setae; S5 ( Fig. 29 ) with lateral denticle, nearly longitudinal and slightly curved inwards, without distinct hollow; T7 ( Fig. 30 ) with one medial longitudinal impunctate area.

Female. Unknown.

Distribution. China (Gansu).

Remarks. This species is similar to T. (J.) borealis Chen & Yang, 1990 by having the following character states: pronotal lateral face ventrally with dense oblique striae; mesoscutum ( Fig. 25 ) with notaulus and dense punctures; apex of marginal cell of forewing not exceeding the second submarginal cell; T2–T6 ( Fig. 22 ) with sparse punctures. However, this new species differs from it by having the lateral carina of propodeum obsolete; propodeal areola slightly convergent posteriorly, medial longitudinal carina reaching posterior 1/2 of areola ( Fig. 26 ); S1 smooth and impunctate ( Fig. 28 ); T2 1.7× wider than long, and its lateral margin rounded ( Fig. 22 ).

Etymology. The specific name rotunda is derived from a Latin adjective rotundus (= round), referring to the lateral margin of T2 that is rounded in dorsal view.

Figures

FIGURES 22–30. Tiphia (Jayneisa) rotunda sp. nov., holotype, ♂. 22. Habitus, dorsal view; 23. Head, frontal view; 24. Vertex, dorsal view; 25. Pronotum and mesoscutum, dorsal view; 26. Mesoscutellum, metanotum and propodeum, dorsal view; 27. T1–T3, lateral view (spm: subposterior margin of T1, spg: subapical groove of T1); 28. S1, ventral view; 29. S5, lateral view (ld: lateral denticle of S5); 30. T6–T7, dorsal view.