Vekunta jahini, Rahman, Mohammad Atikur, Kwon, Yong Jung & Suh, Sang Jae, 2012

Rahman, Mohammad Atikur, Kwon, Yong Jung & Suh, Sang Jae, 2012, Two new species of the genus Vekunta Distant (Hemiptera: Fulgoromorpha: Derbidae) from Korea, Zootaxa 3313, pp. 23-33 : 30-32

Vekunta jahini sp. nov.

( Figs 13−24 )

Description. Body length (including forewing): male 5.4−5.6 mm (N=36), female 6.0− 6.2 mm (N=40); forewing length: male 4.4−4.7 mm (N=36), female 5.1−5.3 mm (N=40).

Coloration. General color pale brownish yellow. Vertex ( Fig. 13 ) yellow brown with yellow sensory pits. Frons ( Fig. 14 ) yellowish brown. Clypeus yellow. Rostrum yellow with apex fuscous. Eyes black, ocelli yellow. Antennae ( Fig. 15 ) yellow brown. Pronotum ( Fig. 13 ) pale yellow. Mesonotum ( Fig. 13 ) usually yellowish brown, often tinged with persimmon red lining on median carina and each side of lateral carina. Tegmina pale brown or dirty white with pale yellow longitudinal veins. Wings light brown with waxy powder and brown longitudinal veins. Thorax with ventral areas pale yellow, mesopleura with an oval black spot. Legs pale yellow to yellow brown. Each segment of abdomen dark brown ventrally with yellow margin posteriorly. Genital segment dark brown.

Head and thorax. Head with eyes distinctly narrower than pronotum (1:1.46). Vertex wider at base than long in middle line (1.3:1), apex narrower than base (1:1.44), straightly projecting before eyes, excavated medially, lateral margin prominent and flate with numerous sensory pits, posterior margin concave. Frons longer in middle line than wide at widest part (2.28:1), width at level of ocelli narrower than widest part (1:1.55), length shorter than clypeus (1:1.06), disc depressed in entire length, each of lateral margin strongly keeled with a series of granules, median carina absent. Clypeus tricarinate. Apical segment of rostrum longer than wide. Antennae short, second antennomere oval, flagellum originated from apical point, subantennal process short. Eyes semicircular; ocelli present, adjacent to eyes. Median length of pronotum less than that of vertex (1:1.82), anterior margin between eyes convex, length behind eyes greater than median length (1.47:1), median carinae distinct, transverse carinae strongly elevated, ventral and lateral margins not foliately raised. Mesonotum as long as broad, slightly convex, in lateral view slightly raised above vertex, longitudinal median carina distinct, lateral carinae weakly developed, posterior end triangularly depressed. Tegmina ( Fig. 17 ) narrow, 3.1 times as long as widest part, clavus closed, claval veins with a prominent ridge of setiferous tubercles, base of costal margin curved inward, costal margin also granulated, R fused with M for short distance. Wings ( Fig. 18 ) slightly shorter than tegmina.

Male genitalia. Anal segment in lateral profile ( Fig. 23 ) long, wider at basal half, slender and curved on apical half, tumed cephalad; in dorsal view ( Fig. 22 ) longer in middle line than wide at base (2.61:1), lateral margin subparallel, slightly converging to apex, apical margin deeply incised medially. Aedeagal shaft curved, in right lateral view ( Fig. 19 ), with three basal processes, one large, elongate, lying alongside shaft, recurved medially, directed caudad, another two short, visible in both left ( Fig. 20 ) and right lateral view, one narrow and directed dorsocaudal, other one wide and directed caudad; flagellum ( Figs 19, 20 ) with a long process extending from base, directed dorsad and widely separated from main body, lobes dorsolaterally concave at apex, with two sublobes, blunt apically, sclerotized, one with dented margin, flagellum reaching to middle of shaft. Genital styles ( Fig. 21 ) in profile large, elongate, reaching over apex of anal segment, dorsal margin convex, posterior end slightly curved, symmetrical; inner margin with a bilobed process at base, spinose apically. Pygofer in profile with dorsocaudal angles ( Fig. 24 ) produced caudad asymmetrically, left side triangularly produced but in right side, not produced.

Female genitalia. Genital scale ( Fig. 14 ) symmetrical, base convex and produced medially, with production longer in middle line than wide at widest part (1.15:1).

Type materials. Holotype male, KOREA: Songnisan, Chungcheongbuk −do Province, 9 Sep. 2001, Y.J. Kwon (KNU). Paratypes: KOREA: 6 males, 9 females, same data as holotype; 3 males, 3 females, Daegu city, Gyeongsangbuk −do Province, 6 Sep. 1981, Y.J. Kwon; 3 males, 4 females, Is. Jindo, Jeollanam −do Province, 19 Jul. 1984, Y.J. Kwon; 5 males, 9 females, Jungmun, Jeju −do Province, 11 Aug. 1984, Y.J. Kwon; 2 males, 2 females, Hwaaksan, Gyeongsangnam −do Province, 6 Aug. 1998, Y.J. Kwon; 2 males, Hwanghaksan, Gyeongsangbuk −do Province, 17 Sep. 1991, Y.J. Kwon; 2 females, same locality, 14 Sep. 1991, Y.J. Kwon; 2 males, 1 female, Jangyu −ri, Jeollanam −do Province, 15 Aug. 2011, Y.J. Kwon; 2 males, 1 female, Is. Hongdo, Jeollanam −do Province, 10 Aug. 1981, Y.J. Kwon; 2 males, Uido, Jeollanam −do Province, 17 Aug. 1998, Y.J. Kwon; 3 females, same locality, 15 Aug. 1998, Y.J. Kwon; 1 male, Hakkasan, Gyeongsangbuk −do Province, 6 Sep. 1998, Y.J. Kwon; 4 males, Hakilsan, Gyeongsangbuk −do Province, 13 Aug. 1997, Y.J. Kwon; 1 male, 1 female, Unjangsan, Jeollabuk −do Province, 28 Aug. 1998, Y.J. Kwon; 1 male, 2 females, Paegunsan, Jeollanam −do Province, 11 Sep. 1999, Y.J. Kwon; 1 male, Sadubong, Jeollabuk −do Province, Korea, 16 Aug. 1997, Y.J. Kwon; 2 females, Gazisan, Gyeongsangbuk −do Province, 1 Oct. 1984, Y.J. Kwon; 1 female, Naejangsan, Jeollabuk −do Province, 14 Aug. 1981, Y.J. Kwon (KNU).

Etymology. This species is named after Jahin Abrar Rahman, the son of the first author of this article.

Remarks. This species is closely related to V. nutabunda Yang et Wu, 1993 from Taiwan, but can be distinguished from the latter by the aedeagal shaft ( Fig. 19 ) with three processes (aedeagal shaft with two processes in V. nutabunda ); flagellum ( Fig. 19 ) with two sclerotized sublobes, one dented, reaching to middle of aedeagal shaft (flagellum without sclerotized sublobes, not reaching to middle of aedeagal shaft in V. nutabunda ); female genital scale with production longer in middle line than wide at widest part about 1.15:1 (female genital scale with production wider at base than long in middle line about 1.2: 1 in V. nutabunda ).

Figures

FIGURES 13 – 24. Vekunta jahini sp. nov. (13) Dorsal habitus, male. (14) Frons, clypeus and rostrum. (15) Head and thorax, lateral view. (16) Female genital scale. (17) Tegmen. (18) Wing. (19) Aedeagus, right lateral view. (20) Aedeagus, left lateral view. (21) Pygofer with genital styles, ventral view. (22) Anal segment of male, dorsal view. (23) Anal segment of male, lateral view. (24) Dorsocaudal process of pygofer. Scale bars = 1.0 mm (Figs 13 – 18), 0.5 mm (Figs 19 – 24).