Stenatkina luteimacula, Meng, Ze-Hong, Yang, Mao-Fa & Li, Zi-Zhong, 2012

Meng, Ze-Hong, Yang, Mao-Fa & Li, Zi-Zhong, 2012, Two new species of Stenatkina Young, 1986 from China with comparative notes on the female genitalia (Hemiptera: Cicadellidae: Cicadellini), Zootaxa 3231, pp. 53-67 : 56-57

Stenatkina luteimacula sp. nov. ( Figs 31–43 , 80–92 , 96–97 )

Description. Length of males 7.4–7.7 mm, females 8.0– 9.4 mm.

Coloration. Head, thorax and forewing black in dorsal view. Males: crown and pronotum with yellow spots. Crown with 11 spots, one on apex, two on median portion, four on basal portion, and four on anterior and median area of lateral margins. Pronotum with seven spots, one on median portion and lateral portions with three pairs (some specimens with no or not clear median spot). Mesonotum with three spots located on anterior lateral portions and apex of scutellum (some specimens with these spots indistinct). In a few specimens, forewing with indistinct short longitudinal stripes located on clavus. Face pale; frontoclypeus with three transverse black spots on upper portion, median spots usually small or absent; lateral margins and apical margin of frontoclypeus, antennal pit and anteclypeus black. Thorax sternum mostly black with pale stripes. Legs usually with dorsal portion black and ventral portion pale. Abdomen black in ventral view; sternites with posterior margins pale. Subgenital plates dark brown and with margins pale. Females: spots and stripes similar to males, but crown with apical spot divided into pair of spots; sometimes with spot located on anterior lateral angle of eye; spots on pronotum and mesonotum distinct. Forewing black with three longitudinal yellow stripes, one in clavus, one in corium extending along claval suture and attaining basal half of second apical cell, and another one near costal margin, but sometimes only with distinct or indistinct claval stripes. Upper portion of face with distinct black spots, or forming one black stripe; frontoclypeus with upper lateral margin black but posterior portion yellow; anteclypeus yellow, with or without black spot. Legs pale, tibiae and tarsi of prothoracic legs and tarsal apex of each leg black. Abdomen usually pale in ventral view; sternites of few specimens with anterior margins dark brown.

External features. Head produced, anterior margin rounded in males and slightly angulate in females; median length slightly longer than interocular width in males and distinctly longer than interocular width in females; with distinct longitudinal fovea between ocelli, and between ocelli and eyes; with longitudinal carina adjacent to ocelli, and on lateral margins of crown; ocelli located on imaginary line between anterior eye angles; lateral frontal sutures extending onto crown, attaining ocelli; frontoclypeus slightly convex, muscle impressions distinct; transclypeal suture complete. Pronotum broader than head, anterior margin slightly convex anteriorly, posterior margin with triangular concavity; mesonotum with surface of scutellum flattened or convex, transverse depression nearly straight. Forewing with apical membrane indistinct; with distinct hyaline band near costal margin in females, but indistinct in males; with four apical cells, base of second cell more proximal than base of third. Hindleg with femoral setal formula 2:1:0.

Male genitalia. Pygofer ( Fig. 37 ), in lateral view, with apical margin narrowly rounded, surface with macrosetae on apical portion and extending anteriorly along ventral margin; ventral margin without process. Subgenital plate ( Fig. 38 ) produced posteriorly farther than apex of pygofer, with apical half narrower and slightly curved dorsally; surface with uniseriate macrosetae arranged obliquely, and with short microsetae on apical portion and longer microsetae on outer lateral margin. Aedeagus, in lateral view ( Fig. 39 ), with shaft straightly produced posterodorsally; preatrium broadly subtriangular and lamellate, with base articulating with median portion of paraphyses; in ventral view ( Fig. 41 ), shaft broadly lamellate with narrowly rounded apex; preatrium forming pair of lobes produced anteriorly. Paraphyses ( Figs 40 and 41 ) with median portion of apical half with pair of acute processes extending laterodorsally, apex acute; in ventral view ( Fig. 41 ) with basal half vase-shaped. Connective ( Fig. 42 ) broadly V-shaped. Style ( Fig. 43 ) with apical portion curved, apex acute.

Female genitalia ( Figs 80–92 ). The ovipositor features much resemble Stenatkina albopennis Yang. Abdominal sternite VII ( Fig. 80 ), in ventral view, as long as broad; posterior margin with broad concavity forming two small lateral lobes; lateral margins slightly convergent posteriorly on apical half; surface with scattered small setae. Pygofer ( Fig. 81 ), in lateral view, moderately produced; posterior margin round; surface with macrosetae on posterior portion and extending anteriorly along ventral margin beyond its midlength but not attaining basal margin. Valvulae I of ovipositor ( Figs 96 and 97 ), in ventral view, with basal portion with flower-like lobe (FL). Other features similar to Stenatkina albopennis Yang.

Etymology. The specific name, a combination of luteus, meaning yellow, and macula, refers to the yellow spots and stripes of these insects.

Distribution. China (Yunnan).

Remarks. The color pattern of the new species is similar to that of S. fusiforma Young , but the crown of the former has anterior lateral spots which are not present in the latter. Based on male genitalia characteristics, S. luteimacula differs from S. fusiforma in having the median portion of the apical half of the paraphyses with a pair of processes ( Figs 40 and 41 ), while in S. fusiforma the paraphyses lack pair of processes near median portion and a distinct median dorsal convexity is present. In addition, the aedeagus in S. luteimacula extends posteriorly slightly farther than the paraphyses ( Fig. 39–41 ), whereas in S. fusiforma the aedeagus is slender and extends much beyond the apex of the paraphyses.

Material examined. Holotype, male, China, Yunnan Province, Mt. Gaoligong, Alt. 1800–2400m, 28 May to 3 June 2009, coll. Yang Zai-hua and Li Bin. Paratypes: 4 males, 9 females, same data as holotype; 1 female, China, Yunnan Province, Yaojiaping, 21 May 2010, coll. Zhang Pei; 1 male, 1 female, 17–18 June 2011, coll. Yang Zaihua.

Figures

FIGURES 31 – 43. Stenatkina luteimacula sp. nov. Body of male (7.7 mm): (31) Dorsal view; (32) lateral view; (33) ventral view. Body of female (8.8 mm): (34) Dorsal view; (35) lateral view; (36) ventral view. Male genitalia: (37) Pygofer, lateral view; (38) subgenital plate, ventral view; (39) aedeagus, lateral view; (40) paraphyses, lateral view; (41) aedeagus and paraphyses, ventral view; (42) connective, dorsal view; (43) style, dorsal view.

FIGURES 80 – 92. Stenatkina luteimacula sp. nov. Female genitalia: (80) Sternite VII, ventral view; (81) pygofer, lateral view; (82) valvifer I, lateral view; (83) valvula I, lateral view; (84) basal portion of valvula I, lateral view; (85) median portion of valvula I, lateral view; (86) apical portion of valvula I, lateral view; (87) valvula II, lateral view; (88) basal portion of valvula II, lateral view; (89) teeth of median portion of valvula II, lateral view; (90) apical portion of valvula II, lateral view; (91) valvifer II, lateral view; (92) gonoplac, lateral view. LAP: lower anterior portion; LPP: lower posterior portion. Scale bars in millimeters.

FIGURES 93 – 98. Valvifers I and bases of valvulae I, ventral view: (93), (94) Stenatkina angustata (Young, 1986); (95) S. moliensis sp. nov.; (96), (97) S. luteimacula sp. nov.; (98) S. albopennis Yang, 2007. BC: broad concavity; FL: flower-like lobe. Scale bars in millimeters.