Xenanastatus Bouček, 1988

Wu, Tong, Ni, Yuanzhou, Wang, Zongying & Peng, Lingfei, 2023, First record of Xenanastatus Bouček (Hymenoptera: Eupelmidae) in China with description of one new species with DNA data, Zootaxa 5374 (4), pp. 585-593 : 587

Xenanastatus Bouček, 1988

Diagnosis. Males are unrecognized; females are distinguished by the following features ( Gibson 1995; Narendran 1998): body size relatively large, at least 5 mm in length; head with ventral margin of torulus at or below level of lower orbit; antenna with first flagellomere longer than wide; mandible tridentate; pronotum in dorsal view with collar deeply divided medially and subquadrangular, with abrupt lateral margins subparallel and anterior margin arcuate to transverse; fore wing with stigmal vein subsessile; mesotibia without oblique apical groove, with large patch of 10 or more apical pegs in 2 or 3 rows; lower mesepimeron a conspicuous, distinctly sculptured or setose region between acropleuron and base of metacoxa; propodeum with subtrapezoidal plical region separated from callar region by anteriorly convergent furrows, and mediolongitudinally sulcate or anteromedially concave below scutellar apex; gaster long with fine median sulcus or line of weakness over at least Gt3‒Gt5, and syntergum (Gt7 + Gt8) with posterior margin rounded; ovipositor sheaths exserted, rigid.

Hosts. Unknown.

Distribution. Australia ( Queensland, New South Wales), India ( Kerala), China ( Guangdong, new record), Thailand. Also recorded from the Afrotropical realm, but without any described species from the area ( Gibson 1995).

Key to females of world Xenanastatus

1. Fore wing completely hyaline without dark bands ( Bouček 1988, fig. 1017); length of ovipositor sheaths subequal to gaster; scape elongate, 4× longer than its maximum width.................................... X. partisanguineus Girault

- Fore wing mostly dark with transverse hyaline band behind marginal vein apically ( Fig. 2A ); other characters partly or completely different from above............................................................................ 2

2. Ovipositor sheath in dorsal view dark brown at base and apex, pale white medially ( Narendran 1998, fig. 1), and a little less than 0.7× length of metatibia; metacoxa with basal one-fourth pale white......................... X. padus Narendran

- Ovipositor sheath in dorsal view dark brown except yellowish-brown or pale brown within basal one-tenth to one-third ( Fig. 3E ; Narendran 1998, fig. 9), and subequal in length to metatibia; metacoxa with basal three-fourths dark with metallic luster ( Fig. 3A )........................................................................................... 3

3. Metatarsus dark brown; PMV 2.6× as long as STV ( Narendran 1998, fig. 7)................... X. keralicus Narendran

- Metatarsus with basal three tarsomeres white ( Fig. 3B ); PMV 4.8× as long as STV ( Fig. 2C ).................................................................................................. X. imbricatius Wu & Peng , sp. nov.

Figures

FIGURE 2. Xenanastatus imbricatius Wu & Peng (holotype, ♀). A, fore wing; B, costal cell and submarginal vein; C, stigmal and postmarginal veins; D, protibia and protarsus. Arrow in C points to apex of stigmal vein.

FIGURE 3. Xenanastatus imbricatius Wu & Peng (holotype, ♀). A, metacoxa and metafemur; B, metatarsus; C, ovipositor sheaths, lateral view; D, mesotarsus; E, gaster and ovipositor sheaths, dorsal view.