Kokeshia stysi, Rédei, 2008

Rédei, Dávid, 2008, Two new species of Kokeshia from India and Thailand (Hemiptera: Heteroptera: Schizopteridae), Acta Entomologica Musei Nationalis Pragae 48 (2), pp. 241-250 : 242-245

Kokeshia stysi sp. nov.

(Figs. 1-5, 7-13)

Type locality. India, West Bengal, Darjeeling District, 3 km S of Ghum, Senchal Reserve Forest [ca. 27°0′17.23″N and 88°15′46.53″E].

Type material. HOLOTYPE: J (macropterous), ‘ INDIA, W.Bengal, / Darjeeling Distr. , / 3 km S. of Ghum / leg. Gy.Topál // No. 340 sifted / moss samples / 19.IV.1967 ’ (mounted on card, abdomen detached, glued on the same card separately in intact condition) ( HNHM) . PARATYPES: same labels as holotype: 1 J (macropterous, incomplete and in bad condition, dissected, fragmented, mounted on slide in Euparal 3C 239, used for the illustrations) and 7 ♀♀ (brachypterous, mounted separately on cards) ( HNHM).

As the macropterous males and brachypterous females were extracted from the same moss sample, the two sexes of this species can be associated with high confidence.

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 (Fig. 1) and external morphology as in Kokeshia martensi Štys, 1985 , except when indicated otherwise.

Head strongly declivent, interocular distance about 0.67 times as wide as diatone, eyes small. Pronotum about 1.8 times as wide between humeri as median length. Fore wing tegminal, surpassing greatly apex of abdomen, shape and venation as in Fig. 1. Fused apical portion of free distal remigial vein abruptly and subtruncately terminating before margin ( Fig. 3 ); vein distally delimiting marginal postfractural cell moderately oblique. Pregenital abdomen ( Fig. 5 ) symmetrical; subgenital plate (sternum VII) wide, symmetrical, posterior margin widely rounded, slightly truncate, much wider than pygophore, entirely covering terminalia in ventral aspect.

Male terminalia. Tergum VIII ( Fig. 7 ) subdivided into asymmetrical hemitergites; left hemitergite with a horizontal brush composed of thick, spiniform microtrichia; right hemitergite triangularly projecting posteriad, right laterotergite not separated from hemitergite (examined in detached pygophore too). Pygophore ( Fig. 7 ) with slight dextral asymmetry, proximally separated by segment X. Proctiger ( Fig. 7 ): segment X directed slightly dextrally, simple; segment XI very short, not surpassing lateral outline of segment X in dorsal view. Parameres asymmetrical ( Figs. 7, 9-12 ); left paramere ( Figs. 9-10 ) with an oval base provided with a smaller anterior and a longer posterior extension, hypophysis simple, flattened, directed mesad; right paramere ( Figs. 11-12 ) similar, with an oval base provided with a wide, rounded posterior

1. Kokeshia stysi sp. nov., macropterous male. Scale in mm.

extension, hypophysis simple, flattened, apically subtruncate. Phallus ( Fig. 13 ): basal plate slightly asymmetrical; with a stout ‘body’ provided with a large, wide left process at its base and a narrow, elongate right process close to its apex; with a tubular, curved, relatively stout apical part protruding from pygophore, external part forming slightly more than a half coil, provided with crest-like sclerites. The possible homologies of the different parts of phallus are touched upon in the Discussion.

Measurements (holotype) (in mm). Body length from apex of head to apex of fore wings as visible in dorsal view 1.39; width of head 0.407, interocular distance 0.272; length of pronotum along meson (including collar) 0.679, length of collar along meson 0.073, humeral width 0.373, length of fore wing 1.178.

Brachypterous female. Colour. More or less uniformly light brown; appendages yellowish brown.

Structure. General facies as in Fig. 4 ; body wide oval, about 1.7 times as long as greatest width. Head strongly declivent, interocular distance about 0.75-0.85 times as wide as diatone, eyes small. Pronotum about 1.9-2.0 times as wide between humeri as median length. Fore wings tegminal, brachypterous, moderately convex, claval fracture not differentiated, reaching from anterior margin to middle of tergum VII. Posterolateral margin of tergum IX simply rounded.

Measurements (n = 5) (in mm). Body length from apex of head in dorsal view to apex of sternum VIII 1.07-1.13; width of head 0.352 -0.383, interocular distance 0.291 -0.321; length of pronotum along meson (including collar) 0.283 -0.291, humeral width 0.581 -0.597, length of fore wing 0.597 -0.719.

Differential diagnosis. Kokeshia stysi sp. nov. markedly differs from all known congeners except K. martensi Štys, 1985 , by having a brush of spiniform microtrichia on the left hemitergite of tergum VIII in male. The male of this new species is rather similar to that of K. martensi and the two species are very probably closely related phylogenetically. The differences of the new species and K. martensi are given in Table 1.

Etymology. It is a pleasure to dedicate this new species to Prof. Pavel Štys, in recognition of his outstanding contributions to Dipsocoromorpha as well as various other groups of true bugs on the occasion of his 75 th birthday.

Locality and habitat notes. According to Gy. Topál’s collecting diary deposited in the HNHM, the specimens have been sifted from moss growing on tree trunks in Senchal Reserve Forest, 2200 m a.s.l.

Distribution. India (West Bengal).

Figures

Figs. 2-6. 2-5. Kokeshia stysi sp. nov. 2 – left fore wing of macropterous male; 3 – apex of free remigial vein of fore wing; 4 – habitus of brachypterous female; 5 – male abdomen, dorsal view. 6 – Kokeshia oroszi sp. nov., male abdomen, dorsal view. Lettering: sVII – sternum VII. Scales in mm.

Figs. 7-12. Kokeshia stysi sp. nov., male. 7 – pygophore, in situ, dorsal view; 8 – microtrichial brush of left hemitergite of tergum VIII, lateral view; 9-10 – left paramere, two different aspects; 11-12 – right paramere, two different aspects.Lettering: aed – aedeagus (= processus gonopori sensu ŠTYS (1985), see text), bpr – basal process of phallus, lp – left paramere, rp – right paramere. Scales in mm.

Fig. 13-18. 13. – Kokeshia stysi sp. nov., phallus. 14-18 – Kokeshia oroszi sp. nov. 14 – pygophore, in situ, dorsal view; 15-16 – left paramere, two different aspects; 17-18 – right paramere, two different aspects. Lettering: aed – aedeagus (= processus gonopori sensu ŠTYS (1985), see text), bpr – basal process of phallus, lp – left paramere, rp – right paramere. Scales in mm.