Alloxiphia tianmua Wei, 2021

Sun, Zemin, Niu, Gengyun, Song, Liangdong, Wan, Siying & Wei, Meicai, 2021, Review of Alloxiphia Wei (Hymenoptera: Xiphydriidae), with descriptions of two new species from China, Zoological Systematics 46 (4), pp. 317-322 : 318-320

Alloxiphia tianmua Wei , sp. nov. ( Fig. 1 )

Description. Female. Body length 14.0mm ( Fig. 1a ). Black; a short stripe on lower inner orbit and malar space, a small lateral macula on abdominal tergites 4 and 5, a lateral long macula on tergite 8 yellow white. Body hairs silver. Legs black, basal third of fore tibia, basal 2/5 of middle tibia, basal 1/2 of hind tibia, middle and hind basitarsi largely white. Fore and hind wings hyaline in basal 3/5 and distinctly infuscate in apical 2/5, pterostigma black.

Body hairs very short. Clypeus with some large and sparse punctures; frons, ocellar area, inner orbits and supraclypeal area coarsely rugose mixed with irregularly carinae ( Figs 1c–e ), anterior third of postocellar area rugose, lower half of hind orbit sparsely punctured with some longitudinal carinae ( Fig. 1d ), upper part of hind orbit smooth with sparse large punctures, postocellar area largely and temple smooth with some minute punctures ( Fig. 1c ); lateral slope of mesoscutellum rugose with distinct smooth patch; abdominal tergite 1 coarsely punctured, inner margin smooth; tergites 2–5 distinctly microsculptured, feebly shiny; other tergites weakly microsculptured.

Maxillary palpomeres 3 and 4 each more than twice as long as broad, palpomere 5 shorter than palpomeres 3 and 4 together, without apical process; labial palp stout, palpomere 1 as long as palpomere 3 and 2 times as long as palpomere 2; flat part of malar space shorter than radius of median ocellus; eyes short and broad, inner margins subparallel downwards, distance between eyes at level of antennal toruli slightly broader than longest axis of eye; antenna with 19 antennomeres and about 1.8 times as long as head breadth, antennomeres 1 and 3 feebly bent, length ratio of basal 5 antennomeres about 43: 17: 29: 17: 16 ( Fig. 1i ), each flagellomere longer than broad and weakly microsculptured; dorsum of mesoscutellum distinctly narrowed backwards; vein 2r in fore wing meeting cell 1Rs at apex, petiole of hind anal cell as long as cu-a; claw with a small inner tooth remote from outer tooth ( Fig. 1f ); ventral margin of ovipositor sheath almost straight, length of ovipositor sheath about 0.45 times as long as abdomen, apical sheath 0.9 times as long as basal sheath; cercus short and bent, about 1/6 length of apical sheath ( Fig. 1g ); sheath in dorsal view gradually narrowed toward apex ( Fig. 1h ).

Male. Body length 10.0– 12.5 mm; clypeus, face, mandible largely, lateral stripes on postocellar area and a longitudinal stripe on hind orbit yellow white; pronotum and prosternum largely, broad anterior margin of and a small middle dot on mesepisternum yellow white, a small lateral macula on abdominal tergite 1 and large lateral macula on tergites 2–7 yellow white; legs orange brown, apex of each coxa yellow, femora brown; wings strongly and evenly infuscate, pterostigma dark brown; antenna with 15–16 antennomeres, basal 4 to 5 antennomeres reddish brown, flagellomeres each more than twice as long as broad; petiole of hind anal cell much shorter than vein cu-a; subgenital plate about 2 times as broad as long.

Etymology. This new species is named after the type locality, Mt. Tianmu.

Distribution. China (Zhejiang).

Material examined. Holotype. ♀, Xianrending, Mt. Tianmu, Zhejiang, China, 119.424°E, 30.349°N, elev. 1506 m, May 28, 2017 , Zejian Li , Mengmeng Liu , Kaiwen Gao , Tingting Ji legs. Paratypes. 3♂, Xianrending, Mt. Tianmu, Zhejiang, China, 119.424°E, 30.349°N, elev. 1506 m, July 10–16, 2017, Kaiwen Gao leg.

Remarks. This new species can be distinguished from other species of Alloxiphia by the above key.

Figures

Figure 1. Alloxiphia tianmua Wei, sp. nov. a–b. Adult. a. Female, holotype; b. Male, paratype. c–i. Female, holotype. c. Head, dorsal view; d. Head, lateral view; e. Head, frontal view; f. Hind claw; g. Apical portion of abdomen, lateral view; h. Ovipositor sheath, dorsal view; i. Basal 5 antennomeres. Scale bars=2.0mm.