Fowlerium, Gnezdilov, 2018

Gnezdilov, Dimir M., 2018, To the revision of the genus Thionia Stål (Hemiptera, Fulgoroidea, Issidae), with description of new genera and new subtribe, Zootaxa 4434 (1), pp. 158-170 : 163

Fowlerium gen. n.

Type species: Thionia naso Fowler, 1905 .

Diagnosis. Metope elongate, with distinct median and sublateral carinae joined in one point on its upper margin ( Doering 1938, Pl. 52: 8, 10). Coryphe elongate, with distinct median carina running from its anterior margin to its middle; anterior margin acutely angulately convex ( Doering 1938, Pl. 51: 2, 5). Second and third segments of rostrum are almost equal in length; third segment narrowing apically ( Fig. 18 ). Fore wings elongate, surpassing abdomen, with narrow hypocostal plate. Forewing vein sequence: R 2, furcating near to basal cell; M 2, furcating before wing middle; CuΑ 1. Clavus long, open—Pcu+Α1 runs into apex of clavus. Pcu fusing Α1 after middle of clavus. Hind wings 3-lobed, with deep cubital and anal clefts and without coupling lobe on its anterior margin. CuΑ2 and CuP not fused apically, but connected by several transverse veins ( Figs 12, 13 ). Pcu and Α1.1 not fused medially, free. Hindwing sequence: R 2 r-m 1 M 1 m-cua 1 CuΑ 2 cua-cup 2-5 CuP 1 cup-pcu 1 Pcu 3 pcu-a1 1 Α1 2 Α2 2–4. Hind tibia with 2 lateral spines. First metatarsomere with a whole row of spines arranged in arc. Ventral aedeagal hooks slightly furcating subapically ( Doering, 1938, Pl. 55: 1, 7, 8). Ovipositor with rounded gonoplacs. Hind margin of VII sternum with large semicircular process.

Etymology. Genus named in honor of famous British entomologist William Weeks Fowler (1849–1923) who describing Thionia naso had doubts on its generic position already ( Fowler 1905: 125). Neuter in gender.

Composition. In addition to type species Thionia producta Van Duzee, 1908 and T. acuta Doering, 1941 also belong to this genus.

Figures

FIGURES 17–18. Thioniina, rostrum in lateral view. 17—Cheiloceps musca Uhler; 18—Fowlerium naso (Fowler).

FIGURES 12–13. Fowlerium spp., hind wing. 12—F. naso (Fowler); 13—F. productum (Van Duzee).