Megischus

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Taxonavigation

Ordo: Hymenoptera
Familia: Stephanidae

Name

Megischus Brullé, 1846 – Wikispecies link – Pensoft Profile

• Megischus Brullé 1846: 537. Type species (designated by Viereck 1914): Megischus annulator Brullé 1846 [= Megischus furcatus (Lepeletier & Serville, 1835)].
• Megischus aplicatus Honget al. 2010: 61.
• Megischus ruficeps Saussure: Chao 1964: 378–379, 387–388, Figs II (1–2), IV (13); Belokobylskij 1995: 22.
• Megischus chaoi van Achterberg: van Achterberg and Yang 2004: 109, 111–112; Hong et al. 2010: 61.
• Megischus ptosimae Chao 1964: 378–379, 387–388, Figs I (1), II (3–4), IV (14), V (6, 10); van Achterberg and Yang 2004: 112–115; Hong et al. 2010: 61.

Diagnosis

Temple without pale yellowish streak along eye, at most with a ventral patch (Figs 226, 245); pronotum robust and without transverse protuberance; vein 1-SR of fore wing differentiated with first discal cell present because of presence of vein 1-SR+M; vein 1-M of fore wing straight or nearly so; first subdiscal cell of fore wing comparatively narrow basally (Figs 228, 239, 240); hind wing without trace of vein cu-a; hind femur largely smooth and with some punctures, ventrally with 2 large teeth (Figs 230, 238, 247, 251); inner side of hind tibia usually with wide submedial depression (Fig. 248); outer side of hind tibia without oblique striae or rugulosity and ventrally evenly rounded (Fig. 249); hind tarsus of female with three tarsomeres (Fig. 238); ovipositor sheath with ivory subapical band (Fig. 250).

Distribution

Cosmopolitan.

Notes

Before this study, 83 species in the genus Megischus were known worldwide, of which 3 species were known from China. In this paper, these three species of the genus are listed from China. A key to species of the genus Megischus from China is as follows:

Key to species of the genus Megischus from China

(after Hong et al. 2010)

Key to species of the genus Megischus from China — C. Hong , C. van Achterberg , Z. Xu

1		Temple narrowly rounded medially behind eye in dorsal view (Fig. 223); neck postero-dorsally at about same level as middle pronotum (Fig. 234); vein cu-a of fore wing strongly reclivous (Fig. 239); hind basitarsus about 4 times as long as wide (Fig. 236); [without distinct pronotal fold and without a cavity (Fig. 234); vein 1-M of fore wing about 5 times as long as vein 1-SR and 1.2 times vein m-cu (Fig. 239); widened part of hind tibia of female nearly straight or weakly concave ventrally (Fig. 238); ivory part of ovipositor sheath about twice as long as dark apical part]    Megischus chaoi van Achterberg & Yang, 2004
–		Temple medially roundly convex behind eye in dorsal view (Figs 226, 244); neck at lower level than middle pronotum postero-dorsally (Figs 222, 242); vein cu-a of fore wing weakly reclivous or subvertical (Figs 228, 240); hind basitarsus 3.0–3.5 times as long as wide (Fig. 231)    2
2		Temple slightly convex behind eye (Fig. 244); pronotal fold distinct and with a cavity below it (Figs 241, 242); vein 1-M of fore wing 4.2–5.5 times as long as vein 1-SR and 1.1–1.3 times vein m-cu (Fig. 240); first tergite largely transversely striate or striate-rugose; head largely blackish or dark brown; widened part of hind tibia of female distinctly concave ventrally (Figs 248, 249), but straight in male (Fig. 251); [whitish or ivory part of ovipositor sheath 0.7–2.0 times as long as dark apical part]    Megischus ptosimae Chao, 1964
–		Temple distinctly convex behind eye (Fig. 226); pronotal fold absent (Figs 221, 222); vein 1-M of fore wing about 2.2 times as long as vein 1-SR and 0.9 times vein m-cu (Fig. 228); first tergite largely smooth and shiny dorsally (Fig. 229); head largely orange brown (Figs 225, 226, 227); widened part of hind tibia of male nearly straight ventrally (Fig. 230)    Megischus aplicatus Hong, van Achterberg & Xu (male)

Taxon Treatment

• Hong, C; van Achterberg, C; Xu, Z; 2011: A revision of the Chinese Stephanidae (Hymenoptera, Stephanoidea) ZooKeys, 110: 1-108. doi

Images

Plate 26a. Figures 221–227. Megischus aplicatus Hong, van Achterberg & Xu, 2010, holotype, male. 221 pronotum dorsal 222 pronotum lateral 223 mesoscutum and scutellum dorsal 224 propodeum dorsal 225 head dorsal 226 head lateral 227 head anterior. After Hong, van Achterberg & Xu (2010).  Plate 26b. Figures 228–232. Megischus aplicatus Hong, van Achterberg & Xu, 2010, holotype, male. 228 fore wing 229 first tergite 230 hind femur and outer side of hind tibia 231 hind tarsus 232 pygidial process. After Hong, van Achterberg & Xu (2010).  Plate 27. Figures 233–239. Megischus chaoi van Achterberg & Yang, 2004, holotype, female. 233 head dorsal 234 pronotum dorsal 235 pronotum lateral 236 hind tarsus lateral 237 base of antenna 238 hind leg lateral 239 fore wing. After van Achterberg & Yang (2004).  Plate 28. Figures 240–246 Megischus ptosimae Chao, 1964, female, Chebaling, Guangdong. 240 fore wing 241 pronotum dorsal 242 pronotum lateral 243 scutellum and propodeum dorsal 244 head dorsal 245 head lateral 246 head anterior.  Plate 29. Figures 247–251. Megischus ptosimae Chao, 1964, female, Chebaling, Guangdong, but 251 male, Hangzhou, Zhejiang. 247 hind femur 248 inner side of hind tibia 249 outer side of hind tibia 250 ovipositor sheath 251 hind femur and hind tibia (male).