Neocyrtoptyx, Xiao & Yan, 2020

Xiao, Hui & Yan, Jiahe, 2020, A new genus of Pteromalidae (Hymenoptera) with two new species, parasitoids of larvae of Stenocephus fraxini Wei (Hymenoptera: Cephidae) from China, Zoological Systematics 45 (3), pp. 231-235 : 232

Neocyrtoptyx gen. nov.

Type species. Neocyrtoptyx shanghensis sp. nov.

Diagnosis. The new genus described here is similar to Ischyroptyx and Cyrtoptyx in the subfamily Pteromalinae by the antenna having three anelli, the pronotum being as broad as the mesoscutum, and the propodeum smooth with median carina reaching the raised adpetiolar lunate strip. However, it can be separated from Ischyroptyx by the marginal vein not thickened, and the flagellum plus pedicel are shorter than the width of the head in females. It differs from Cyrtoptyx in that the hairs on the thorax are white and conspicuous, and the fore wing without a marginal fringe.

Description. Body with white straight hairs, head and mesosoma with raised reticulation. Head oval in frontal view; antennal scrobes shallow, reaching anterior ocellus; malar sulci absent; antennal insertion on center of face; antennal formula 11353, flagellum plus pedicel combined shorter than width of head. Head occiput without carina. Pronotum short and almost as broad as mesosoma; notauli incomplete, frenal line on scutellum shallow; dorsellum long, ovoid and reticulate; propodeum short and smooth, median carina complete; fore wing without marginal fringe; marginal vein longer than postmarginal vein and stigmal vein. Gaster sessile, lanceolate, hind margin of Gt 1 and Gt 2 angularly produced, ovipositor sheath exerted.

Etymology. The new genus name refers to its close relationship with the genus Cyrtoptyx Delucchi, 1956 .

Biology. Parasitic on larvae of Stenocephus fraxini ( Cephidae ) on the ash tree Fraxinus chinnensis ( Oleaceae ).

Distribution. China (Shandong).

Key to species of Neocyrtoptyx .

1. Head in frontal view slightly transverse, 1.28× as wide as high; clypeus 1.76× as wide as high; head 2.39× as wide as long in dorsal view, POL 1.71× OOL; antenna with clava shorter than Fu 4 and Fu 5 combined; postmarginal vein 1.31× as long as stigmal vein....... ....................................................................................................................................................................... N. shanghensis sp. nov. Head in frontal view almost circular, 1.09× as wide as high; clypeus 1.45× as wide as high; head 2.16× as wide as long, POL 2.12× OOL; antenna with clava as long as Fu 4 and Fu 5 combined; postmarginal vein 1.15× as long as stigmal vein........... N. exilis sp. nov.