Igerna Kirkaldy. It 1903
Creators: name: C. A. Viraktamath
Publisher: name: Zenodo
Year: 2011
Subjects: Biodiversity
Taxonomy
Animalia
Arthropoda
Insecta
Hemiptera
Cicadellidae
Igerna

description: Key to Oriental species of Igerna Kirkaldy   
 1. Head, apices and bases of pronoutm and forewing claval veins and sutures, excluding black areas red (Indonesia: Java)............................................................................. Igerna nigrita (Melichar) comb. nov.   
- Coloration ochraceous with dark brown or black spots or areas, lacking red areas................................... 2  
2. Connective with posterior margin extending beyond base of aedeagal shaft thus appearing fused with aedeagus (Figs 329, 337,371)............................................................................................ 3  
- Connective not as above; aedeagus articulated with connective (Fig.288).......................................... 5  
 3. Pygofer lobe rounded caudally without spine-like prjctions (Fig. 375–376), anal collar dorsally curved hook, often forked; aedeagal shaft slender, elongate, process branched, ventrally directed (Fig.371–374) (India: Nilgiri Hills)...................................................................................................... I. violacea (Distant)   
- Pygofer lobe with two spine-like projections (Figs 328, 335)................................................... 4  
 4. Pygofer spines widely separated (Fig. 328); anal collar neither hook-like nor forked; aedeagal shaft stout, processes directed caudally (Fig. 329) (Nepal)............................................................... I. quinlani sp. nov.   
 - Pygofer spines close together (Fig. 335); anal collar S-shaped (Fig. 336); aedeagal shaft slender, processes directed ventrally (Fig. 337) (India: Sikkim)................................................................... I. keyae sp. nov.   
 5. Pygofer lobe produced into attenuated apically bifid process with basal tooth (Fig.306) (India: Sub-Himalayan region)...................................................................................... I. darjeelingensis sp. nov.   
- Pygofer lobe variable, if dorsally produced into an attenuated process not bifid (Figs 352, 353)........................ 6  
6. Pronotum with large triangular black spot (Figs 321, 360); pygofer with mesal lobe armed with one or two spines (Figs 322, 362)................................................................................................ 7  
- Pronotum with two black spots or entirely black; male pygofer mesal lobe when present not as above................... 8  
 7. Male pygofer with mesal lobe armed with two spines (Fig. 323), aedeagal shaft with two lateral asymmetrical processes surrounding gonopore and shaft produced beyond (Figs 325, 326) (India: Kurseong)................ I. himalayensis sp. nov.   
 - Male pygofer mesal lobe armed with one spine (Fig. 364); aedeagus with two subapical and preatrial processes (Figs 365, 367) (India: Sikkim)......................................................................... I. sikkima sp. nov.   
 8. Aedeagal shaft with subapical tooth (Figs 319, 320); style robust, elongate (Fig.318) (Samoa).......... I fasciata (Osborn)   
- Aedeagal shaft without subapical tooth; style slender of normal size (Fig. 294)................................... 9  
9. Pygofer lobe caudo-dorsally produced (Fig. 352, 353)....................................................... 10  
- Pygofer lobe not produced caudo-dorsally (Figs 286, 292383)................................................. 11  
 10. Aedeagal shaft sinuate, S-shaped in caudal view, with an apical bifurcate, caudo-ventrally directed processes (Figs 355, 356) (south India; Sri Lanka)............................................................ I. quadrinotata (Melicahr)   
 - Aedeagal shaft straight, aedeagal process with inner arm, laterally toothed (Figs 314, 315) (India: Kodaikanal)................................................................................................ I. delineata sp. nov.   
 11. Aedeagus complex, with ventral atrial process, shaft with pair of basal processes and pair of subapical teeth-like processes (Figs 388, 389, 390)) (India; Darjeeling)..................................................... I. wilsoni sp. nov.   
- Aedeagus simpler, without ventral atrial process or with basal preatrial processes.................................. 12  
 12. Anal collar process long, slender with forked apex; dorsal margin of pygofer dark pigmented (Figs 346, 349); aedeagal shaft with ventrally directed short, apical process (Fig. 348)(Nepal).................................. I. priyankae sp. nov.   
- Anal collar simple, not forked; pygofer without differential dark pigmentation (Fig. 386); aedeagal shaft with a pair of lateral apically forked processes directed ventrally (Figs 288, 296)................................................... 13  
 13. Male styles slender (Fig. 294), subgenital plates more acutely pointed, inner margins parallel sided (Fig. 287) (Sri Lanka).................................................................................... I. atrovenosa (Melichar)   
 - Male styles robust (Figs. 299, 300); subgenital plates elongate, broadly rounded at apex and inner margins divergent (Fig. 293) (Sunda Islands).......................................................................... I. aurora sp. nov.
description: Published as part of C. A. Viraktamath, 2011, Revision of the Oriental and Australian Agalliini (Hemiptera: Cicadellidae: Megophthalminae) 2844, pp. 1-118 in Zootaxa 2844 on pages 62-63