Lethierium, Dlabola, 1980

Gnezdilov, Vladimir M., 2022, Revision of the genus Lethierium Dlabola, 1980 (Hemiptera: Auchenorrhyncha Issidae), with description of two new species from Central Morocco, Zootaxa 5155 (4), pp. 517-538 : 519

Key to species of Lethierium

1. Metope smooth, without distinct intermediate carinae ( Figs 3 , 8 , 11 , 14 ). Each forewing with distinct shoulder-shaped prominence (or knee prominence) well visible in dorsal view ( Figs 1 , 6 , 9 , 12 ).......................................... 2

- Metope with distinct median and sublateral carinae ( Figs 18 , 53 ). Forewings with weak knee prominences ( Fig. 16 ). Morocco................................................................................... L. carinatum sp. nov.

2. Hind tibia with a single lateral spine...................................................................... 3

- Hind tibia with two lateral spines......................................................................... 4

3. Phallobase basement with large lobe-shaped processes ( Fig. 26 ). Aedeagus with nearly straight ventral hooks. Algeria.................................................................................... L. reiberi ( Lethierry, 1878)

- Phallobase basement with short lobe-shaped processes ( Fig. 34 ). Aedeagus with strongly curved ventral hooks. Algeria and Morocco....................................................................... L. juniperi ( Bergevin, 1915)

4. Metope with straight upper margin ( Fig. 14 ). Male anal tube with a rounded process on its lateral margins ( Fig. 47 ). Lobes of phallobase basement enlarged apically ( Fig. 49 ). Style with weakly concave hind margin ( Fig. 51 ). Morocco............................................................................................... L. grandilobum sp. nov.

- Metope with weakly concave upper margin ( Figs 11 , 39 ). Male anal tube without process on its lateral margins ( Fig. 41 ). Lobes of phallobase basement narrowing apically ( Fig. 46 ). Style with deeply concave hind margin ( Fig. 43 ). Morocco....................................................................................... L. cedricolum ( Dlabola, 1989)

Figures

FIGURES 1–3. Lethierium reiberi (Lethierry, 1878), male, Mékalis. 1—dorsal view; 2—lateral view; 3—frontal view. Scale bar—1 mm.

FIGURES 6–8. Lethierium juniperi (Bergevin, 1915), female, Aïn Kerma. 6—dorsal view; 7—lateral view; 8—frontal view. Scale bar—1 mm.

FIGURES 9–11. Lethierium cedricolum (Dlabola, 1989), male, Timhadit. 9—dorsal view; 10—lateral view; 11—frontal view. Scale bar—1 mm.

FIGURES 12–15. Lethierium grandilobum sp. nov., 12–14—holotype, 15—female paratype, Marrakech. 12—dorsal view; 13, 15—lateral view; 14—frontal view.Abbreviation: kp — knee prominence. Scale bar—1 mm.

FIGURES 16–19. Lethierium carinatum sp. nov., female paratype, Bou Naceur. 16—dorsal view; 17—lateral view; 18—frontal view; 19—caudal view. Scale bar—1 mm.

FIGURES 53–55. Lethierium carinatum sp. nov., female paratype, Bou Naceur. 53—face; 54—eye, scapus, pedicel, and paranotal lobe, frontal view; 55—head and pronotum, dorsal view. Out of scale.

FIGURES 23–29. Lethierium reiberi (Lethierry, 1878), Aïn Sefra, male genitalia. 23—pygofer, lateral view; 24—anal tube, dorsal view; 25—anal tube, lateral view; 26—penis and connective, lateral view; 27—penis, ventral view; 28—style, dorsal view; 29—style, lateral view. Out of scale.

FIGURES 32–38. Lethierium juniperi (Bergevin, 1915), Aïn Kerma, male genitalia. 32 – pygofer, lateral view; 33 – penis, ven- tral view; 34 – penis and connective, lateral view; 35 – style, lateral view; 36 – style, dorsal view; 37 – anal tube, dorsal view; 38 – anal tube, lateral view. Out of scale.

FIGURES 47–52. Lethierium grandilobum sp. nov., holotype, male genitalia. 47—anal tube, pygofer, and penis, lateral view; 48—anal tube, dorsal view; 49—penis and connective, lateral view; 50—penis and connective, ventral view; 51—style, lateral view; 52—style, dorsal view. Out of scale.

FIGURES 39–40. Lethierium cedricolum (Dlabola, 1989), male, Timhadit. 39—face; 40—head and pronotum, dorsal view. Out of scale.

FIGURES 41–46. Lethierium cedricolum (Dlabola, 1989), Timhadit, male genitalia. 41—anal tube and pygofer, lateral view; 42—anal tube, dorsal view; 43—style, lateral view; 44—style, dorsal view; 45—penis, ventral view; 46—penis and connective, lateral view. Out of scale.