Gasteruption sinepunctatum, Zhao, Ke-xin, Achterberg, Cornelis van & Xu, Zai-fu, 2012

Zhao, Ke-xin, Achterberg, Cornelis van & Xu, Zai-fu, 2012, A revision of the Chinese Gasteruptiidae (Hymenoptera, Evanioidea), ZooKeys 237, pp. 1-123 : 70-72

Gasteruption sinepunctatum sp. n. Figs 228240

Type material.

Holotype, ♀, (ZJUH), "[China:] Zhejiang, Mt. Tianmu, 2.IX.1987, Jin-jiang Fan". Paratypes: "[China:] Jilin, Daxinggou, 7.VIII.2005"; 1 ♀ (TARI), "[China:] Taiwan, Nantou, Lienhuachi, 650 m, IV.1984, K.S. Lin & K.C. Chou, Malaise trap"; 1 ♀ (TARI), "[China:] Taiwan, 2.IV.1921, Tokuyo coll."; 1 ♂ (TARI), "[China:] Formosa [= Taiwan], Taito, 25. II– 27.III.1919, S. Inamura, J. Sonan, M. Yoshino"; 1 ♂ (TARI), "[China:] Taiwan, Takeyama, 16.V.1926, J. Sonan"; 1 ♀ (TARI), "[China:] Taiwan, Chipon, 9.X.1938, J. Sonan"; 1 ♀ (CSCS), "[China:] Tibet, Cibagou, Chayu, 22.VI.2009, 28°53.816'N, 97°27.771'E, alt. 2697 m, Mei-cai Wei".

Diagnosis.

Anterior half of mesoscutum very finely coriaceous, rarely very finely transversely rugulose, and with at most some shallow punctures; fourth antennal segment of ♀ 1.7-1.9 times as long as third antennal segment (Figs 236, 238); head more narrowed in dorsal view, resulting in a more transverse head (Figs 233, 239); head dorsally more or less shiny and smooth; vertex slightly convex medio-posteriorly in lateral view or occipital carina narrow lamelliform medio-dorsally (Fig. 228); frons smooth or micro-sculptured; pale apical part of ovipositor sheath 1.3-2.8 times as long as hind basitarsus; subbasal pale patch of hind tibia distinctly differentiated; ovipositor sheath 0.8-1.3 times as long as body and 1.2-1.7 times as long as metasoma; ovipositor slender and nearly straight or gradually upcurved apically; apical 0.3 of hypopygium incised.

Description.

Holotype, female, body length 15 mm, of fore wing 8 mm.

Head. Head more or less truncate, directly narrowed behind eyes and almost straight laterally (Fig. 233); temple at most 0.5 times as long as eye in dorsal view; vertex and frons with satin sheen and rather sparsely very finely punctulate; vertex moderately convex posteriorly and without any depression medio-posteriorly; occipital carina narrow and non-lamelliform medio-dorsally (Fig. 228); third antennal segment 1.3 times as long as second segment, fourth antennal segment 1.8 times as long as third segment, fifth antennal segment 1.6 times as long as third segment (Fig. 236); eye glabrous; OOL 1.1 times as long as diameter of posterior ocellus; minimum width of malar space 0.2 times as long as second antennal segment; clypeus without depression (Figs 232, 237).

Mesosoma. Length of mesosoma 2.1 times as long as its height; propleuron 0.9 times as long as mesoscutum in front of tegulae (Fig. 229); side of pronotum mainly coriaceous, but medio-ventrally with rugose; mesoscutum coriaceous and matt, later ally slightly rugulose (Fig. 230); medio-posteriorly regularly rugulose; scutellum coriaceous and matt; propodeum reticulate, medio-longitudinal carina absent.

Wings. Fore wing: first discal cell parallel-sided and with outer posterior corner rounded (Fig. 234).

Legs. Hind coxa matt, moderately slender and dorsally transversely rugulose; length of hind femur, tibia and basitarsus 4.6, 5.5 and 6.8 times their width, respectively (Fig. 231); middle tarsus 1.3 times as long as middle tibia.

Metasoma. Ovipositor sheath 0.9 times as long as body, 1.4 times as long as metasoma, 4.2 times as long as hind tibia and 2.5 times combined hind tarsus and tibia; its apical ivory part 2.7 times as long as hind basitarsus and 0.2 times as long as ovipositor sheath; hypopygium rather slit-shaped incised apically.

Colour. Black; antenna dark brown to brown; legs brown, fore tarsus yellow, hind coxa dark brown, large ventral subbasal patch of hind tibia ivory or yellow; second-fifth metasomal tergites brown ventrally; ovipositor sheath black-brown, but largely apex ivory or yellow (Fig. 235); pterostigma dark brown.

Male (described after a male from Taiwan). Similar to female, but mesoscutum with some rather coarse punctures. Third antennal segment as long as second segment (Fig. 238); fourth segment 3.5 times as long as third segment (as fifth segment), and 1.8 times as long as second and third segments combined; propleuron rather robust and 0.9 times as long as mesoscutum in front of tegulae; hind leg coloured as in female with hind tibia slightly less swollen (Fig. 240); apical tergite not impressed apically; paramere brown apically; body length 13.2 mm.

Distribution.

China (Jilin, Zhejiang, Taiwan, Tibet).

Etymology.

Named after the very finely sculptured mesoscutum lacking any punctures (Latin: “sine” is “without” and " punctatum " is having punctures, dots or spots).

Biology.

Unknown. Collected in February–June, August–October.