Lethierium carinatum, Gnezdilov, 2022

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 : 535-537

Lethierium carinatum sp. nov.

( Figs 16–19 , 53–63 , 69, 70 )

Diagnosis. Metope with distinct median and sublateral carinae. Forewings with very weak knee prominence. Hind tibia with two lateral spines. Aedeagus with ventral hooks curved at right angle. Style with weakly concave hind margin and with a comb under the capitulum; capitulum on short neck. Total length: male—3.5 mm, females—3.8– 4.0 mm.

Description. Metope flat (almost not visible from above), wide, weakly enlarged below eyes, with distinct median and sublateral carinae ( Figs 18 , 53 ). Median carina of metope running from its upper margin to metopoclypeal suture. Sublateral carinae of metope not reaching metopoclypeal suture. Coryphe transverse, twice as wide as long medially; anterior margin widely convex; posterior margin concave ( Fig 16 , 55 ). Pronotum slightly longer than coryphe, sometimes with weak median carina. Mesonotum slightly longer than pronotum, without carinae. Forewings nearly oval, with many transverse veins in its apical halves. Basal cell circular. Radius and media of forewings diverging from the basal cell at acute angle and furcating at wing basal third; radius furcating before media. Forewing vein sequence ( Fig. 17 ): R 3 (R 1 not reaching wing margin); M 6, firstly furcating at wing basal third, M 1 and M 2 furcating at wing middle and apically; CuA1. Hind tibia with two lateral spines and 9–10 apical spines. First metatarsomere with seven intermediate spines.

Coloration. General coloration light brown to straw yellow. Rostrum dark brown, with black 3 rd segment. Abdominal tergites brown to dark brown, with yellow hind margins, to black. Sensory pits of abdominal sternites IV–VI surrounded by brown to dark brown areas. Claws brown to dark brown. Apices of leg spines black.

Male genitalia ( Figs 56–63 ). Anal tube elongate, twice as long as wide medially, its lateral margins steeply turned down apically (in dorsal view) ( Fig. 58 ), with semicircular subapical processes (in lateral view) ( Fig. 57 ). Anal column large, ⅓ of anal tube length. Phallobase with large lobe-shaped processes at its basement, concaved or truncated ( Fig. 59 ). Ventral phallobase lobe notched apically ( Fig. 61 ). Aedeagus with curved at right angle ventral hooks. Style with weakly concave hind margin and with a comb under the capitulum; caudo-dorsal angle truncate ( Fig. 62 ). Capitulum of style on short neck, narrowing apically (in dorsal view), with large lateral and apical teeth ( Fig. 63 ).

Female genitalia ( Figs 19 , 69, 70 ). Hind margin of sternite VII widely concave, with short labial median process (in dorsal view) ( Fig. 70 ). Anal tube convex (in lateral view); parallel-sided, almost not narrowing apically, twice as long as wide medially, widely rounded apically (in dorsal view) ( Figs 19 , 69 ). Anal column short, ¹⁄ of length of anal tube, narrow.

Type material. Holotype, ♂, “Ich. Bou Naceur / 3000-13-VI-29 / Le Cerf” ( MNHN) . Paratypes: 1♀, “Ich. Bou Naceur / 3000-13-VI-29 / Le Cerf” ( ZIN) ; 1♀, “Dunes près / Oued Yquem / 22-9-32 / F Le Cerf” ( MNHN) .

Notes. Bou Naceur Mt. is located in Sefrou Province of central Morocco.

Figures

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 56–63. Lethierium carinatum sp. nov., holotype, male genitalia. 56—pygofer, lateral view; 57—anal tube, lateral view; 58—anal tube, dorsal view; 59—penis and connective, lateral view; 60—connective, caudal view; 61—penis, ventral view; 62—style, lateral view; 63—style, dorsal view. Out of scale.

FIGURES 64–70. Lethierium spp., female. 64—L. cedricolum (Dlabola, 1989), Ras el ma, sternite VII, dorsal view; 65—same, ventral view; 66—L. reiberi (Lethierry, 1878), Mékalis, sternite VII, dorsal view; 67—L. juniperi (Bergevin, 1915), Aïn Kerma, sternite VII, dorsal view; 68—same, ventral view; 69—L. carinatum sp. nov., paratype, Bou Naceur, anal tube, dorsal view; 70—L. carinatum sp. nov., paratype, Bou Naceur, sternite VII, dorsal view.