Euxiphydria shaanxiana Smith & Shinohara, 2011

Smith, David R. & Shinohara, Akihiko, 2011, Review of the Asian wood-boring genus Euxiphydria (Hymenoptera, Symphyta, Xiphydriidae), Journal of Hymenoptera Research 23, pp. 1-22 : 13

Euxiphydria shaanxiana Smith & Shinohara sp. n. Figs 36 41

Holotype.

Female, labeled "[China: Shaanxi], Kaitianguan, 2000m, 34 00N 107 51E, Mt. Taibaishan, Qinling Mts.., 27.v.2005, A. Shinohara" (1 ♀, IZB).

Paratype.

"Shaanxi, Kaitianguan, 2000 m, 34 00N, 107 51E, Mt. Taibaishan, Qinling Mts., 5.VI.2007, A. Shinohara" (1 ♀, NSMT).

Description.

Female. Length, 13 mm.

Color. Head red; thorax, abdomen, and legs black ( Figs 36, 37 ). Wings uniformly hyaline ( Figs 36 ).

Head. Antenna with 15 antennomeres; length of first four antennomeres as 1.0:0.4:0.9:0.4. Frons reticulate in front of ocelli and between ocelli and eyes, with irregular almost parallel carinae dorsal to and between antennae ( Fig. 41 ). Upper half of gena and vertex from posterior margin of lateral ocelli smooth, shiny. Malar space between eye and antennal groove narrow, much less than width of groove ( Fig. 41 ). Width of gena behind eyes about subequal to eye width. Head from above rounded and narrowing behind eyes, distance behind eyes about equal to eye length ( Fig. 40 ).

Thorax. Pronotum smooth and shiny anteroventrally, reticulate to carinate dorsally and posteriorly ( Fig. 38 ). Mesoscutal middle lobe and inner margins of lateral lobes finely punctate to reticulate; outer lateral lobes with large smooth, shiny area ( Fig. 39 ). Axilla and mesoscutellum finely punctate with irregular longitudinal carinae ( Fig. 39 ), mesoscutellum separated from axillae by narrow punctures, broad lateral downturned area shining with four or five transverse carinae ( Fig. 39 ). Mesepisternum mostly reticulate; mesepimeron anteriorly almost smooth, posteriorly with fine transverse carinae; metapleuron finely reticulate ( Fig. 38 ). Metascutellum about 2.5 × broader than long, finely reticulate, rounded posteriorly ( Fig. 39 ). Hind basitarsomere shorter than length of remaining tarsomeres combined, as 0.8:1.0.

Abdomen. Basal plates mostly smooth and shining, finely punctate anteriorly, ( Fig. 39 ); rest of abdomen shiny, finely punctate. Length of sheath subequal to length of basal plate.

Male.

Unknown.

Etymology.

Named for the Chinese province in which it was collected.

Discussion.

The red head and black thorax, abdomen, and legs are similar only to Euxiphydria potanini . In Euxiphydria shaanxiana , the head is entirely red, behind the eyes in dorsal view sharply rounded with the distance about equal to the eye length, the sculpture on the frons consists of irregular carinae, and the axillae and mesoscutellum are more finely sculptured with the posterior portion smooth and shiny.

Figures

Figures 36 - 37. Euxiphydria shaanxiana, holotype 36 Dorsal view 37 Lateral view.

Figures 38 - 41. Euxiphydria shaanxiana ,, holotype 38 Thorax, lateral view 39 Thorax, dorsal view 40 Head, dorsal view 41 Head, front view.