Stictotettix, Ohara & Hayashi & Kamitani, 2019

Ohara, Naomichi, Hayashi, Masami & Kamitani, Satoshi, 2019, New genus of dikraneurine leafhopper (Hemiptera: Cicadellidae: Typhlocybinae) from Japan, with description of two new species, Zootaxa 4629 (2), pp. 271-279 : 272

Stictotettix gen. nov.

Type species: Stictotettix cleyerae sp. nov.

Body oblong and flattened. Head slightly narrower than pronotum, with crown (vertex in dorsal view) angularly produced, with coronal suture distinct basally, extending near middle of dorsal midline; median length of crown approximately twice as long as next to eye; face elongate, depressed in profile, less than 45° from horizontal, with frontoclypeus slightly concave basad, flat apicad, with anteclypeus narrow and flat, not sexually dimorphic; lateral frontal suture not extended beyond antennal pits; antennal ledge developed; antenna as long as head width; ocellus absent. Pronotum moderately large, approximately 1.5 times as long as mesonotum, with lateral margin distinctly carinate. Fore wing with cross vein r-m at base of 2nd apical cell, veins RP and MP’ arising from r cell , and vein MP”+CuA’ arising from m cell; 1st apical cell (outer apical cell) short, about as long as width; 2nd apical cell short, approximately 1.5 times as long as 4th apical cell (inner apical cell), truncate basally; 3rd apical cell slightly widened apicad, curved anteriorly, with basal vein MP” shorter than or nearly as long as CuA’; 4th apical cell (inner apical cell) about as wide as 3rd apical cell, with basal vein CuA’’ about as long as CuA’. Hind wing broadly rounded apically; vein RP fused to MP’ in apical 1/4–1/5; vein MP” confluent near branching point of CuA; vannal vein (AA+AP’) branched near middle. Fore femur with seta AM1 enlarged, situated near ventral margin; intercalary row with 1–2 large basal setae and about 10 smaller setae in apical half. Hind femur with macrosetal formula 2+1+1; hind tibia setal row AV with 4 preapical macrosetae. Male abdominal sternal apodemes short, not or slightly exceeding posterior margin of 3rd sternite. First valvula of ovipositor with dorsal margin strongly narrowed subapically, with strigate sculpture in apical 1/3, arranged into broad dorsal and narrow middle and ventral areas subapically. Second valvulae asymmetrical; right one with 10–11 strong teeth dorsally, which are small apically and each bearing secondary denticles or not; left one with slightly serrated dorsal margin.

Male genitalia. Pygofer rounded caudally, angularly emarginate dorsocaudad, with dorsal midline about half length of pygofer, with dorsal process. Subgenital plate subtriangular, with oblique row of several macrosetae near mid-length and some smaller setae near apex. Style slender, with preapical lobe poorly developed, with basal apodeme longer than or as long as apophysis. Connective U-shaped, bent dorsad caudally. Aedeagus large; preatrium elongate, shorter than atrium; atrium large in lateral view, produced caudodorsally, surrounding base of shaft, with dorsal and ventral processes ( Figs. 24–26 ); shaft tubular, invaginated into atrium basally; gonopore apical. Anal tube weakly sclerotized, shorter than pygofer.

Distribution. Japan.

Diagnosis. This new genus is similar to Cuanta Dworakowska, 1993 , Michalowskiya Dworakowska, 1972 , Naratettix Matsumura, 1931 , etc, in the flattened body and the relative length of pronotum to mesonotum. In the features of the fore wing venation, this genus closely resembles Naratettix , but differs in having the 2nd apical cell shorter and with the base distinctly narrowed but not stalked, and the vein MP”+CuA’ reaching the wing apex. The features of the male style show similarity to those of Platfusa Dworakowska, 1993 and Takagioma Thapa, 1989 . Although the presence of a long aedeagal preatrium ( Fig. 24 ) is common to Emelyanoviana Anufriev, 1970 , Erythria Fieber, 1866 and Igutettix Matsumura, 1932 , the new genus is characterized by the features of the aedeagus, with the atrium extremely developed and the shaft invaginated into the atrium basally. Therefore, the aedeagal atrium is produced dorsocaudally and surrounds the base of shaft ( Figs. 24–26 ). These are unique among dikraneurine genera.

Etymology. This genus is masculine in gender and it is derived from two Greek words: stictos (marked, spotted) + tettix (cicada).

Figures

FIGURES 18–26. Stictotettix cleyerae sp. nov. Male abdominal sternal apodemes (18), ♀ 7th abdominal sternite (19) and ♂ genitalia (20–26).—20, Genital capsule in lateral view; 21, pygofer in dorsal view; 22, subgenital plate in ventral view; 23, style and connective in dorsal view; 24, aedeagus in lateral view; 25, 26, aedeagal apex in caudal (25) and dorsal (26) views. Scales: 0.05 mm (25, 26), 0.1 mm (23, 24), 0.2 mm (18–22).