Kokeshia zhengi, Rédei, Dávid, Ren, Shuzhi & Bu, Wenjun, 2012

Rédei, Dávid, Ren, Shuzhi & Bu, Wenjun, 2012, Two new species of Kokeshia from China (Hemiptera: Heteroptera: Schizopteridae), Zootaxa 3497, pp. 29-36 : 32-35

Kokeshia zhengi sp. nov.

(Figs. 2, 4, 8–10, 17–22)

Type material. Holotype (3): “ CHINA: Hubei, Fangxian, \ Tucheng, 16-23.VII.2011 \ tobacco field, leg. XP Zhang, \ CR Li, J Zhong & CL Hou” [printed], [a card with same data in Chinese script, printed]; mounted on card, abdomen detached from body and mounted on the same card separately ( NKUM). — Paratypes: same labels as holotype, mounted on card (2 3 NKUM); same labels as holotype, stored in plastic tube with absolute alcohol at -20 °C (43, NKUM). All dry-mounted specimens are in good condition; in one of the alcohol-preserved specimens the body is broken between the prothorax and the mesothorax.

Other material examined. Two strongly defective conspecific males, all from the same sample as the types, are excluded from the type material: one is alcohol-preserved, lacking head, pronotum, part of mesonotum, and fore wings; the other is represented only by a disjointed abdomen, used for preparing the illustrations, its parts are mounted on card separately, embedded in alcohol-soluble shellac gel.

FIGURES 5–10. Kokeshia xiei sp. nov. (5–7) and K. zhengi sp. nov. (8–10), male, apex of pregenital abdomen and genitalia. 5 and 8, segment VIII, genital capsule, and postgenital abdomen, lateral view; 6, 7, 9 and 10, schematic representations of Figs. 3, 4 , 5 and 8, respectively, for clarifying homologies (genital capsules are densely dotted, parameres are striped). Lettering: aph = apical portion of phallus; bpr = basal process of phallus; gc = genital capsule; lht8 = left hemitergite VIII; lp = left paramere; plht8 = process of left hemitergite VIII; rht8 = right hemitergite VIII; rp = right paramere; s7 = sternite VII; t7 = tergite VII; X+XI = proctiger. Scale bars in mm; Figs. 6, 7, 9 and 10 not to scale.

Diagnosis. Kokeshia zhengi sp. nov. is recognized by the following combination of characters: (1) left hemitergite VIII (Fig. 9–10: lht8) is of unique shape: its apical margin is produced into a short projection not reaching posterior margin of genital capsule, densely covered by thick microtrichia, and equipped with a small group of strong, pigmented, spine-like microtrichia medioapically; (2) right hemitergite VIII (Fig. 9–10: rht8) is of unique shape: lateral portion not projecting posteriad, median narrowed portion provided with a rounded, blunt posterior projection around midline of body; and (3) apical portion of the phallus (Figs. 9–10: aph) is long, relatively thick, forming nearly a full coil outside of the genital capsule. More or less similar appendages of left hemitergite VIII are present in K. martensi and in K. stysi Rédei, 2008 , however, their shape is distinctly different in the latter two species (cf. Štys 1985: 192, fig. 15; 194, figs. 19–20; Rédei 2008: 246, figs. 7–8).

Description. Macropterous male.

Colour. Fore wings light brown; head, pronotum, scutellum and fore wing veins darker brown; abdomen light brown; appendages yellowish brown.

Structure. General facies and external morphology as in Kokeshia martensi (cf. Štys 1985) except when indicated otherwise.

Head: interocular distance 0.68–0.70 times as wide as width of head across eyes. Thorax: pronotum 1.72–1.77 times as wide across humeri as median length; fore wing ( Fig. 22 ): fused apical portion of free distal remigial vein abruptly terminating before apical margin of wing, r-m cross vein present as a short spur interrupted by costal fracture therefore marginal postfractural cell not present.

Pregenital abdomen (Fig. 2): tergite VII slightly asymmetrical, somewhat longer along its left side than its right side; sternite VII showing very slight dextral asymmetry. Tergite VIII subdivided into two asymmetrical hemitergites: left hemitergite VIII (Figs. 9–10: lht8) with a short apical projection not reaching posterior margin of genital capsule, densely covered by thick microtrichia, and equipped by a small group of strong, pigmented, spinelike microtrichia medioapically; right hemitergite (Figs. 9–10: rht8) simple, its posterior margin broadly rounded laterally, its median narrowed arm-like portion provided with a rounded, blunt posterior projection around midline of body.

External genitalia. Genital capsule (Figs. 9–10: gc) simple, with slight dextral asymmetry, dorsally membranous, anterior and posterior apertures not separated by distinct dorsal sclerotized bridge-like portion therefore seemingly confluent; posterior margin nearly transverse. Parameres strongly asymmetrical: left paramere (Figs. 9–10: lp; Figs. 17–19 ) with an oval base provided with a broadly rounded, laminate extension directed dorsad and a smaller blunt projection directed ventrad, furthermore an elongate and flattened distal projection directed mesad in rest; right paramere (Figs. 9–10: rp; Figs. 20–21 ) with an oval base provided with a small, rounded extension directed posteroventrad, and a straight, flattened distal projection directed mesad in rest. Phallus provided with a large, shell-like left process (Figs. 9–10: bpr), apical portion (Figs. 9–10: aph) tubular, relatively thick, protruding from genital capsule, external part forming about one coil outside of genital capsule.

Measurements (N = 5) (in mm). Total length from apex of head to apex of fore wings as visible in dorsal view 1.38–1.49; width of head 0.395–0.427, interocular distance 0.270–0.302, length of pronotum 0.390–0.410, length of collar along midline 0.070–0.073, humeral width 0.690–0.705, length of fore wing 1.175–1.243, greatest width of abdomen 0.595–0.645.

Habitat. The examined specimens, all of them males, were collected in a tobacco field by sweep-netting.

Etymology. The specific epithet is patronymic, derived from and dedicated to Prof. Leyi Zheng (NKUM), recognizing his outstanding contribution to the taxonomy of several groups of Heteroptera, on the occasion of his 80th birthday last year.

Figures

FIGURES 3 – 4. Segment VII, external genitalia, and postgenital abdomen of males of Kokeshia spp. in dorsal view. 3, K. xiei sp. nov.; 4, K. zhengi sp. nov. Only outline of tergite VII shown (dotted line). Scale bar in mm. For clarifying homologies, see Figs. 6 and 9.

FIGURES 11 – 22. Kokeshia xiei sp. nov. (11 – 16) and K. zhengi sp. nov. (17 – 22). 11 – 13, 17 – 19 left paramere, three different aspects; 14 – 15, 20 – 21, right paramere, two different aspects; 16 and 22, right fore wing. For lettering see text. Scale bars in mm.