Dryophilocoris zebrinus

Cho, Young Jae & Kwon, Yong Jung, 2011, A new species of genus Dryophilocoris Reuter (Hemiptera: Heteroptera: Miridae: Orthotylinae) from South Korea, with a key to Korean species, Zootaxa 2760, pp. 61-64 : 62-64

Dryophilocoris (s. str.) zebrinus Cho et Kwon , sp. nov.

Figures 1–7

Diagnosis. This new species is easily distinguished from other congeneric species in having the anterior lobe of pronotum entirely shiny (Figs. 1–2). Hitherto, the anterior lobe of pronotum always was pruinose, this charactistic was used to explain a characteristic feature of genus Dryophilocoris Reuter. Although distinctive, the structure of vesica is related to D. flavoquadrimaculatus ( De Geer, 1773) , but in the latter sclerites I and II are of equal length, and sclerite II has a straight, extended sub-branch.

Description. Male. COLOURATION: Body generally yellow, slightly shiny. Head yellow; frons dark brown with a yellow longitudinal median stripe; vertex yellow, each apical side of the basal transverse carina dark brown; antennal segment I–II dark brown, III–IV pale brown. Labium yellow, apical segment III and segment IV darkened. Pronotum yellow with two dark brown, longitudinal bands; calli entirely dark brown; metasternum between hind coxa reddish. Mesoscutum dark brown; scutellum yellow, each side of basal corner brown. Forewings yellow; clavus dark brown except basal coner, antero-inner part of corium dark brown; cuneus yellow; embolium yellow; membrane fuscous, membrane vein brown, outer vein of small membrane cell pale yellow. Legs yellow; tarsi and claws dark brown. Abdomen reddish yellow.

STRUCTURE: Body elongate, parallel-sided; dorsal surface with very sparse golden pubescence. Head convex, clothed with golden setae; vertex with basal transverse carina. Antenna slender, all segments with erect golden setae; labium extending to procoxae. Pronotum entirely shiny, with short semierect golden pubescence; mesoscutum clothed with golden pubescence; scutellum somewhat transversely rugose, covered with golden pubescence. Hemelytras weakly shagreened; corium and cuneus with short semierect golden pubescence. Legs cylindrical; tibial spines pale brown with dark spots on basally. Male genitalia (Figs. 3–7): ventral surface of pygophore strongly excavated, without tergal processes (Fig. 3); left paramere with claw-like sensory lobe and bluntly ended hypophysis (Fig. 4); right paramere oblique-rectangle, inwardly bent before middle, and with toothed apex (Fig. 5); phallotheca simple, dorsally open near middle, margins distally contiguous (Fig. 6); vesica with two elongated, moderately serrate sclerite (Fig. 7).

FIGURE. 1–2. Habitus photographs of Dryophilocoris zebrinus sp. nov.; 1. Male, dorsal view; 2. Female, dorsal view. Scale: 2mm.

FIGURE. 3–7. Male genitalia of Dryophilocoris zebrinus sp. nov.; 3. Pygophore, dorsal view; 4. Right paramere, dorsal view; 5. Left paramere, dorsal view; 6. Phallotheca, lateral view; 7. Vesica, lateral view. Scale: 0.2 mm.

Female. As in male aside from following colouration. COLOURATION: Head yellow; frons yellow with two dark brown longitudinal bands; antennal segment I dark brown except inner side pale brown, II pale brown with apical 1/3 dark brown, III–IV dark brown. Pronotum with two dark brown longitudinal bands, not reaching anterior part of pronotum. Mesoscutum yellow, with each side of 1/3 dark brown.

Dimensions. [ɗ (n=13)/Ψ (n=6)] ɗ: Body length 5.65–5.80, head width 0.85–0.90, vertex width 0.32–0.35, length of antennal segment I–IV 0.50–0.52: 1.90–1.94: 0.75–0.80: 0.35–0.40, total labium length 1.52–1.57, pronotal length 0.90–0.93, pronotal width 1.50–1.55, width across hemelytra 1.50–1.54, and length of hind femur: tibia: tarsus 1.80– 1.84: 3.10–3.15: 0.40–0.42; Ψ: Body length 6.00–6.50, head width 0.86–0.91, vertex width 0.34–0.36, length of antennal segment I–IV 0.52–0.54: 1.90–1.94:.075–0.80: 0.35–0.40, total labium length 1.60–1.62, pronotal length 0.90–0.93, pronotal width 1.50–1.53, width across hemelytra 1.90–1.94, and length of hind femur: tibia: tarsus 1.90–1.94: 2.95– 3.00: 0.40–0.42.

Type material. Holotype, 1ɗ, Baekunsan, 300–400m, Gwangyang-si, Jeollanam-do, South Korea, 35o04’07.09’’N 127o38’0.85’’E, 20–21 Apr 2010, YJ Cho. Paratypes, 7ɗ, same data as holotype; 5ɗ, Baekunsan, 300–400m, Gwangyang-si, Jeollanam-do, South Korea, 35o04’07.09’’N 127o38’0.85’’E, 25 Apr 2010, YJ Cho; 4Ψ, Andong-si, Gyeongsangbuk-do, South Korea, 36o34’01.36’’N 128o41’22.54’’E, 0 4 May 2009, YJ Cho; 2Ψ, Baekunsan, 300–400m, Gwangyang-si, Jeollanam-do, South Korea, 35o04’07.09’’N 127o38’0.85’’E, 25 Apr 2010, YJ Cho.

Distribution. South Korea.

Etymology. The specific name alludes to the blackish, longitudinal line on the body.

Biology. This species was collected on Quercus aliena Blume (Fagaceae) at both a hillside of broad-leaf inhabitants and a low mountainous area, although other Korean congeneric species were usually collected more than 800m above sea level in mountainous areas of broadleaf trees. Some males of the new species also were attracted to lights. The newly emerged male appeared from middle to late April, and females appeared from late April to middle May.