Sakakidikra, Catalano & Dietrich, 2017

Catalano, María Inés & Dietrich, Christopher H., 2017, Two new Dikraneurini genera from Ecuador (Hemiptera: Cicadellidae: Typhlocybinae), Zootaxa 4281 (1), pp. 232-237 : 233

Sakakidikra n. gen.

Figs. 1–12

Type species Sakakidikra jazminae n. sp.

Description. Head ( Fig. 1 ) as wide as pronotum. Crown strongly produced, narrowly rounded apically, as long as width between eyes, posterior margin not elevated above pronotum. Coronal suture very short. Ocelli absent. Face depressed in profile, less than 45° from horizontal. Frontoclypeus flat. Anteclypeus narrow, flat; with parallel lateral margins; not sexually dimorphic. Lorum separated from genal margin, relatively broad. Rostrum extended slightly beyond front trochanters.

Thorax. Mesepisternum partially divided by suture into anepisternum and katepisternum.

Forewing ( Fig. 2 ) apex rounded; with three apical cells; inner apical cell large, extended to wing apex and occupying more than half total width of apical margin; second apical cell very small, short and trapezoidal. Hind wing ( Fig. 3 ) apex broadly rounded; submarginal vein present, extending around the wing apex beyond the apex of vein R+M; vein M unbranched (crossvein between M and CuA absent); vannal vein unbranched.

Front femur with AM1 seta enlarged, on ventral margin; AV row with setae subequal in size; PV row without fine basal setae. Hind femur macrosetae 2+1; tibia row AV row with 4 macrosetae.

Abdomen. 2S apodemes ( Fig. 4 ) well developed, extended beyond posterior margin of sternite IV; nearly parallel.

Male genitalia. Pygofer ( Fig. 5 ) strongly emarginate dorsally, with posterodorsal appendage. Subgenital plate ( Fig. 6 ) extended beyond apex of pygofer; in ventral view, distinctly widened and angulate laterally in basal part; in lateral view, section basad of medial constriction subequal to distal section; with few macrosetae and scattered fine setae. Style ( Fig. 7 ) apophysis longer than apodeme; in lateral view, sickle shaped, very long, extended beyond caudal margin of pygofer; with few long and fine setae preapically; apex tapered. Aedeagus ( Fig. 8 ) with preatrium shorter than shaft; dorsal apodeme long, columnar; shaft symmetrical, in lateral view, curved dorsad, moderately long, surface smooth, with paired lateral processes arising near midlength and extended along shaft; gonopore apical. Aedeagus-connective articulation subterminal. Connective ( Fig. 9 ) Y shaped.

Female terminalia. Abdominal sternite VII ( Fig. 10 ) posterior margin lobulate with paired lateral lobes. Pygofer, in lateral view, oval with 8 macrosetae in row on caudo-ventral margin. Second valvula ( Fig. 11 ) slender, large valve with 14–16strong teeth without denticles, apex with small teeth; small valve ( Fig. 12 ) with regular, small teeth.

Etymology. The genus is named in honor of Prof. Albino M. Sakakibara, in recognition of his outstanding contributions to knowledge of the South American fauna of Membracoidea. The name combines the first part of his family name with the prefix of the type genus of the tribe and is treated as a feminine noun.

Notes. The hind wing venation of this genus is unique among known Dikraneurini . As in Hybla Young , the venation is greatly reduced, with CuA unbranched and without a crossvein connecting it to M (i.e., M is also unbranched), but differs in having the vannal vein unbranched. The forewing of Sakakidikra resembles that of Tricella n. gen. (described below) in having only three apical cells and the median apical cell relatively small.

Figures

FIGURES 1 – 12. Sakakidikra jazminae n. sp. 1, dorsal habitus; 2, forewing; 3, hindwing. Male: 4, sternal apodemes 2 S; 5, pygofer, lateral view; 6, subgenital plate; 7, style; 8, aedeagus, lateral view; 9, connective. Female: 10, sternite VII; 11, large valve; 12, small valve.