Neocyrtoptyx shanghensis, 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 : 232-233

Neocyrtoptyx shanghensis sp. nov. ( Figs 1–8 )

Diagnosis. Head in frontal view slightly transverse, 1.28× as wide as high; eyes height 0.58× head height; clypeus 1.76× as wide as high. Antenna with clava shorter than the length of Fu 4 and Fu 5 combined. Postmarginal vein 1.31× as long as stigmal vein; Gt 1 0.21× length of gaster.

The new species is quite similar to N. exilis sp. nov., but it is stouter than the latter, and can be separated with the characters listed in the key.

Description. Female (holotype). Body ( Figs 1–2 ) length 4.5 mm. Head and body dark green with bluish reflection. Mandibles brown, antennae mainly brown except joints of each section yellowish. Coxae concolorous with body, tibia and tarsi yellow, pretarsus yellowish brown.

Head in frontal view reticulated, 1.28× as wide as high ( Fig. 3 ); eye height 0.58× head height; eyes separated by 1.52× their height. Antennal scrobes shallow, reaching anterior ocellus ( Fig. 3 ). Clypeal suture obvious, clypeus 1.76× as wide as high, with radial striation; clypeal margin emarginate ( Fig. 3 ). Antennae inserted in middle of face, distance from lower margin of torulus to lower margin of clypeus 1.26× distance from upper margin of torulus to lower margin of anterior ocellus. Gena smooth and convex; malar sulcus indistinct, malar space 0.45× eyes height. Antenna ( Fig. 4 ) with three anelli and five funicular segments; scape reaching and exceeding anterior ocellus; length of pedicel and flagellum combined shorter than head width (0.88×); pedicel conical, 1.7× as long as broad in lateral view, shorter than each funicular segment; anelli transverse; each funicular segment longer than its broad, with three irregular rows of sensilla, clava segment with single row of sensilla; ratio of length and width from Fu 1 to Fu 5 as 12:6, 12:6, 11:5.5, 8:5.5, 7:5.5; clava not wider than funicle, 2.43× as long as broad, shorter than the length of Fu 4 -Fu 5 combined. Head in dorsal view, 2.39× as wide as long; POL 1.71× OOL, temple short.

Head slightly wider than thorax (1.06× as broad as mesosoma) ( Fig. 5 ). Pronotum, mesoscutum and scutellum with raised reticulation. Pronotum 0.94× as broad as mesoscutum. Mesoscutum 1.59× as broad as long; notauli incomplete. Scutellum 1.13× as broad as long, frenal line shallow but traced, frenum 0.37× length of scutellum. Dorsellum reticulated, 2.6× as broad as long, shorter than frenum and propodeum. Propodeum almost smooth ( Fig. 5 ), 0.2× as long as scutellum, median carina distinct. Thorax in lateral view ( Fig. 6 ), prepectus small and smooth; upper mesepisternum finely reticulate with small area smooth. Fore wing ( Fig. 7 ) 2.88× as long as broad, speculum large; marginal fringe absent; costal cell with sparse setae; ratio of marginal vein: postmarginal vein: stigmal vein as 27:19:14.5; stigmal vein oblique, stigma slightly expanded, approximately 1/3 length of stigmal vein.

Gaster lanceolate, 2.57× as long as broad, longer than head and mesosoma combined (1.32×); hind margin of Gt 1 and Gt 2 angularly produced and emarginate in the middle; Gt 1 0.21× length of gaster, Gt 2 shorter than Gt 1. Ovipositor sheaths distinctly produced in dorsal view.

Male ( Fig. 8 ). Gaster shorter than head and thorax combined, other characters similar to the female.

Type material. Holotype, female, China, Shandong, Shanghe Xian (37.18°N, 117.09°E), 1.VIII.2015 – 6.VI.2015, leg. Jiahe Yan (Hyp-2018-74) . Paratypes. 2♀ (Hyp-2018-74), 1♂ (Hyp-2018-78), same data as holotype .

Etymology. The specific named after the location of the type material.

Biology. Parasitic on the larvae of Stenocephus fraxini ( Hymenoptera , Cephidae ).

Distribution. China (Shandong).

Figures

Figures 1–10. Neocyrtoptyx spp. 1–8. N. shanghensis, sp. nov., female, holotype. 1. Body in dorsal view. 2. Body in lateral view. 3. Head in frontal view. 4. Antenna. 5. Mesosoma in dorsal view. 6. Body in lateral view. 7. Fore wing in dorsal view. 8. Male, body in lateral view. 9–10. N. exilis sp. nov., female, holotype. 9. Body in dorsal view. 10. Body in lateral view.