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.