Kokeshia xiei, 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 : 30-32

Kokeshia xiei sp. nov.

(Figs. 1, 3, 5–7, 11–16)

Type material. Holotype (3): “ CHINA: Hainan Prov. \ Lingshui, Diaoluoshan \ 300 m, 10.VIII.2008 \ at light, leg. Q. Xie” [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 (12 3 NKUM, 8 3 HNHM); same labels as holotype, stored in plastic microvial with glycerol, microvial pinned (2 3 HNHM); “ CHINA: Hainan Prov. \ Lingshui, Diaoluoshan \ 300 m, 13.VIII.2008 \ at light, leg. Q. Xie” [printed], [a card with same data in Chinese script, printed]; stored in plastic tube with absolute alcohol at -20°C (20 3, NKUM). All specimens are in good condition, at most with minor lacks in antennal or tarsal segments.

Other material examined. A long topotypic series collected at 9, 10, 11 and 13.viii. 2008, composed of about 200 conspecific specimens, is stored in absolute alcohol at -20 °C at NKUM. These specimens are not included in the type material.

FIGURES 1–2. Abdomens of males of Kokeshia spp. in dorsal view. 1, K. xiei sp. nov.; 2, K. zhengi sp. nov. Lettering: s7 = sternite VII; t7 = tergite VII. Scale bar in mm.

Diagnosis. Kokeshia xiei sp. nov. is easily recognized by the process of the left hemitergite VIII (Figs. 6–7: plht8) of unique shape: long, horizontal, surpassing posterior margin of genital capsule; and the long, narrow apical portion of the phallus (Figs. 6–7: aph) forming nearly a full coil outside of the genital capsule. More or less similar brush-like appendages are present in K. martensi and K. stysi Rédei, 2008 ; however, in K. martensi the microtrichia are set up on a short process by far not reaching posterior margin of genital capsule, whilst in K. stysi the microtrichia are directly attached to the main body of left hemitergite VIII, no horizontal process of the latter is present.

Description. Macropterous male.

Colour. Fore wings light brown; head, pronotum, scutellum and fore wing veins slightly darker; 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 0.67–0.68 times as wide as head across eyes. Thorax: pronotum 1.77–1.78 times as wide across humeri as median length; fore wing ( Fig. 16 ): fused apical portion of free distal remigial vein abruptly terminating before apical margin of wing, r-m cross vein in some specimens present as a short spur on M projecting towards R (as in K. martensi as figured by Štys 1985: 190, fig. 8), fully lacking in other specimens (as in Fig. 16 ), closed marginal postfractural cell not present.

Pregenital abdomen (Fig. 1): tergite VII (Fig. 1: t7) slightly asymmetrical, distinctly longer along its right side than its left side, posterior margin weakly emarginate anteriad of proctiger; sternite VII (Fig. 1: s7) showing distinct dextral asymmetry, apical margin obliquely truncate, slightly concave, its dorsal surface with some modified, thick, peg-like hairs in some specimens (as in Fig. 3 ), whilst these were lacking in most of specimens examined. Tergite VIII subdivided into two asymmetrical hemitergites: left hemitergite VIII (Figs. 6–7: lht8) with a long, thick, horizontally directed process (Figs. 6–7: plht8) surpassing posterior margin of genital capsule, with a cover of densely packed, thick, spiniform microtrichia especially at its ventral and median surfaces; right hemitergite VIII (Figs. 6–7: rht8) simple, projecting posteriad laterally.

External genitalia. Genital capsule (Figs. 6–7: gc) simple, with slight dextral asymmetry, dorsally membranous, anterior and posterior apertures not separated by distinct dorsal sclerotized bridge-like portion; posterior margin nearly transverse. Parameres strongly asymmetrical: left paramere (Figs. 6–7: lp; Figs. 11–13 ) with an oval base provided with a broadly rounded, laminate extension directed dorsad and a blunt, somewhat angulate projection directed ventrad, furthermore an elongate and flattened distal projection directed mesad in rest; right paramere (Figs. 6–7: lp; Figs. 17–19 ) with an oval base provided with straight, flattened distal projection. Phallus provided with a large, concave left basal process (Figs. 6–7: bpr), apical portion (Figs. 6–7: aph) tubular, thin, protruding from genital capsule, external part forming about one full 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 1.24–1.25; width of head 0.359–0.361, interocular distance 0.241–0.245, length of pronotum 0.335–0.340, length of collar along midline 0.058–0.065, humeral width 0.598–0.603, length of fore wing 1.083–1.048, greatest width of abdomen 0.210–0.220.

Habitat. The habitat at the type locality in Hainan Island was a valley, with a stream with stony banks at its bottom. Specimens were captured in five nights, at light set up at the same place, about 30–50 m distance from the stream (Q. Xie pers. comm.). In total nearly 300 specimens were collected. All captured specimens were males; since not a single female individual was captured it is highly probable that the female of this species has different life habits, probably it is flightless as it was documented in K. esakii , K. martensi , K. hsiaoi , and K. stysi ( Miyamoto 1960, Štys 1985, Ren & Zheng 1992, Rédei 2008).

Etymology. The specific epithet is patronymic, derived from and dedicated to its collector, our colleague and friend Dr. Qiang Xie (NKUM), recognizing his efforts towards understanding the phylogeny of Heteroptera.

Figures

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.

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.