Libengaia Linnavuori, 1161

Viraktamath, C. A., Webb, M. D. & Yeshwanth, H. M., 2024, Opsiini leafhopper genus Libengaia Linnavuori (Hemiptera: Cicadellidae: Deltocephalinae) in Africa and India with description of one new subgenus and six new species, Zootaxa 5507 (1), pp. 104-122 : 106-107

Key to species of Libengaia Linnavuori (males)

1. Subgenital plate with distal membranous appendage ( Fig. 5B ); each aedeagal shaft without process near apex ( Figs 2E , 3E , 4E )............................... Libengaia (Libengaia) , (Central and West Africa).............................. 2

- Subgenital plate without distal membranous appendage ( Figs 8C , 10B ); each aedeagal shaft with process near apex ( Figs 8F , 9F , 10F )… Libengaia (Nandiana) , ( India)................................................................. 11

2. Aedeagus with forks of ventral process spiculose ( Figs 3 DE).............................. L. (L.) immaculata sp. nov.

- Aedeagus with forks of ventral process glabrous............................................................. 3

3. Aedeagus with ventral process twice branched ( Figs 2 DE)................................. L. (L.) brevistylus sp. nov.

- Aedeagus with ventral process once branched ( Figs 3D , 4C )................................................... 4

4. Aedeagal shaft in lateral view with apex three pronged ( Fig. 5F )................................ L. (L.) trifida sp. nov.

- Aedeagal shaft not as above............................................................................. 5

5. Greyish species with dark markings....................................................................... 6

- Pale yellow species, crown with or without two prominent or faint black transverse spots, dark mottling on pronotum and forewings reduced................................................................................... 10

6. Style apophysis 0.66 as long as style ( Fig. 4G ).......................................... L. (L.) longistylus sp. nov.

- Style apophysis less than half as long as style ( Fig. 4B )....................................................... 7

7. Aedeagus ventral process serrated along ventral margin in lateral view ( Fig. 4D )................ L. (L.) deemingi sp. nov.

- Aedeagus ventral process not serrated along ventral margin in lateral view........................................ 8

8. Aedeagus ventral process much longer than shafts in lateral view............................................... 9

- Aedeagus with ventral process slightly shorter than shafts in lateral view ( Linnavuori 1969: Fig. 26d)................................................................................................... L. (L.) nicias Linnavuori

9. Aedeagus with process on preatrium as long as shaft in lateral view ( Linnavuori 1969: Fig. 26a).... L. (L.) helias Linnavuori

- Aedeagus with process on preatrium much shorter than shaft or absent ( Linnavuori 1969: Figs 24ab)................................................................................................ L. (L.) vermiculata (Melichar)

10. Aedeagus with ventral process more than 2× as long as shaft in lateral view ( Linnavuori 1969: Fig. 24g)............................................................................................... L. (L.) milionia Linnavuori

- Aedeagus with ventral process about 1.5× as long as shaft in lateral view ( Linnavuori 1969: Fig. 25b)................................................................................................. L. (L.) narcissa Linnavuori

11. Aedeagal shaft apex with one apical process ( Figs 8F , 10E )................................................... 12

- Aedeagal shaft apex with two processes ( Figs 9F–H )............................. L. (N.) lamerallis Sunil & Meshram

12. Aedeagal shaft apex with process thin, of uniform width, directed anterodorsally ( Fig. 10F ).... L. (N.) ramamurthyi sp. nov.

- Aedeagal shaft apex with process retrorse and widened distad of midlength ( Fig. 8F ).................................................................................................... L. (N.) bharatiensis (Malhotra & Sharma)

Figures

FIGURE 2 A–E. Libengaia (Libengaia) brevistylus sp. nov., male genitalia. A, pygofer, lateral view; B, style, dorsal view; C, connective, dorsal view; D, aedeagus, dorsal view; E, aedeagus, lateral view.

FIGURE 3 A–E. Libengaia (Libengaia) immaculata sp. nov., male genitalia. A, genital capsule, lateral view; B, style, dorsal view; C, connective, dorsal view; D, aedeagus, ventral view; E, aedeagus, lateral view.

FIGURE 4 A–G. Species of Libengaia (Libengaia) male genitalia. A–D, L. (L.) deemingi sp. nov.: A, genital capsule, lateral view; B, style, dorsal view; C, aedeagus, ventral view; D, aedeagus, lateral view. E–G, L. (L.) longistylus sp. nov.: E, aedeagus, lateral view; F, aedeagus, dorsal view; G, style, dorsal view.

FIGURE 5 A–F. Libengaia (Libengaia) trifida sp. nov., male genitalia. A, pygofer, lateral view; B, subgenital plate, ventral view; C, connective, dorsal view; D, style, dorsal view and apex of style, magnified; E, aedeagus, dorsal view; F, aedeagus, lateral view.

FIGURE 8 A–G. Libengaia (Nandiana) bharatiensis (Malhotra & Sharma, male genitalia: A, pygofer and anal tube, lateral view; B, valve, ventral view; C, styles and subgenital plates dorsal view; D, style, dorsal view; E, connective and aedeagus, dorsal view; F, aedeagus, ventral view; G, connective and aedeagus, lateral view.

FIGURE 9 A–H. Libengaia (Nandiana) lamerallis Sunil & Meshram, metatibia and male genitalia: A, chaetotaxy of apex of metatibia, ventral view; B, pygofer, lateral view; C, subgenital plate, ventral view; D, connective, dorsal view; E, style, dorsal view; F, aedeagus dorsal view; G, aedeagal shaft, dorsolateral view; H, aedeagus, lateral view.

FIGURE 10 A–G. Libengaia (Nandiana) ramamurthyi sp. nov., male genitalia: A, pygofer, lateral view; B, style, valve and subgenital plate dorsal view; C, style, dorsal view; D, connective and aedeagus, dorsal view; E, aedeagus ventral view; F, connective and aedeagus, lateral view; G, aedeagus lateral view.