Igerna channa, Dai, Wu & Zhang, Yalin, 2012
treatment provided by
Igerna channa sp. nov.
Figs 3View FIGURE 3 A, E, I; 11 A –G
Male. Darker than female. Crown of head with median stripe continued and connecting large spot on face, two connected round spots on either side of median line close to inner margin of eye, dark brown. Antennal pits, lateral areas of gena adjacent to lora, median stripe on clypellus, facial sutures, dark brown. Pronotum with anterolateral margins, median stripe widening posteriorly, round spot on either side of median line at midlength, triangular spot on either side of median line closer to hind margin, dark brown. Scutellum with short median and one lateral triangular spots, round spot on either side of median line anterior to transverse sulcus and inverted hemispherical spot posterior to it, dark brown. Forewing venation brown, claval commissure with brown stripe interrupted by yellow, with spots at apices of claval veins and clavus, yellow. Legs marked with dark brown, ventral and lateral areas meso- and metathoracic segments, chocolate brown with pale yellow markings. Female color pattern similar to male with dark brown areas variously reduced.
Robust. Crown of head shorter medially than next to eyes, hind margin sinuate. Pronotum slightly convex, shagreened. Forewings with three subapical cells with inner subapical cell closed basally, four apical cells.
Male genitalia. Genital capsule about as long as its height, caudal lobe conically produced, thickening on caudodorsal margin. Anal collar process hooked. Subgenital plates exceeding caudal margin of pygofer. Styles with inner fork slightly longer than outer. Connective wider than long, bilobed apically, dark pigmented. Aedeagus rather complex, preatrium well developed, dorsal apodeme well developed, preatrium with triangular projection. Shaft broad basally, gradually tapered to pointed apex, with two pairs of processes: shorter pair subapical on lateral margin and directed ventroanteriorly, longer one strongly curved at midlength and directed caudally; gonopore apical.
Female genitalia. Hind margin of seventh sternite almost straight.
Measurements. Male 4.0 mm long, 1.5 mm wide across eyes.
Material examined. CHINA: HOLOTYPE 3, Tibet, Bomi Jieda, 3050m, 18.vii. 1978, Li Fasheng ( CAU). PARATYPES: Tibet: 3 Ƥ same as holotype; 13, Chayu Huwei, 2100m, 28.vi. 1973, Li, Fasheng; 7 Ƥ, Linzhi, 3050m, on different dates Li Fasheng; 1 Ƥ, Chayu Dongjiao, 1570m, 25.vi. 1978, Li Fasheng; 1 Ƥ, Tanggong, 2300m, 29. vii. 1978, Li Fasheng; Guangxi Province: 1 Ƥ, Huaping County: Hongtan, 5.viii. 2006, Lu Lin ( NWAU).
Distribution. China (Tibet).
Etymology. The species name alludes to the word channa (Kanarese) meaning beautiful.
Remarks. Igerna channa has a well-developed anal collar process as in some species of Austroagallia , but the symmetrical aedeagus places it in the genus Igerna . It can be distinguished from other species of Igerna from the Oriental region by the presence of a process on the dorsal apodeme and a short tooth on the ventral projection of the aedeagus.
Genus Japanagallia Ishihara
Diagnosis. Crown of head sinuate behind eyes, medially shorter than next to eyes. Face wider than long. Ocelli closer to adjacent eye than to each other. Forewings with claval veins connected by cross vein. Male pygofer with dorsal lobe (Figs 16 H, 18 F) or spinelike process ( Figs 14View FIGURE 14 B, 16 D). Anal collar appendage absent. Connective heavily pigmented. Aedeagus usually elongated with well developed dorsal apodeme and often with processes on dorsal apodeme, aedeagal shaft and preatrium.
Distribution. China (Guangxi, Guizhou, Hainan, Shaanxi, Xizang, Zhejiang, Yunnan and Taiwan), India, Nepal, Japan, Korea, Russia.
Remarks. Males of this genus usually bear large black areas on the head, pronotum and scutellum. The forewings are chocolate brown. The females are usually lighter in color. This genus closely resembles Igerna but differs in having one or two claval cross veins and dorsal pygofer spines or processes. The structure of the aedeagus is also distinctive in having both dorsal apodeme and preatrium often well developed and bearing processes. This is the largest genus of Agalliini in China and comprises 17 species.
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