Kosalya circumscripta, Long, Jian-Kun & Chen, Xiang-Sheng, 2013

Long, Jian-Kun & Chen, Xiang-Sheng, 2013, Three new species of the genus Kosalya Distant, 1906 (Hemiptera: Fulgoromorpha: Achilidae) from China, Zootaxa 3683 (5), pp. 549-560 : 554-556

Kosalya circumscripta sp. nov.

( Figs 24–42 )

Measurements. Body length (from apex of vertex to tip of forewing): male 8.0–9.0 mm (n = 2); forewing length: male 6.7–7.5 mm (n = 2).

Coloration. Eyes black. Mesonotum with one large dark brown marking surrounded by an annular marking on disc. Forewing brown. Legs light brown basely. Abdomen with ventral areas pale brown to dark brown, dorsally dark brown. Other external features resemble Kosalya unimaculata sp. nov. in colouring.

Head and thorax. Ratio width of vertex from base to length in middle line 3.1. Ratio length of frons in middle line to maximum width 0.8, ratio maximum width to width at base 1.5. Ratio length of postclypeus in middle line to length of frons 1.4. Rostrum with ratio apical to subapical segment 1.8. Pronotum as long as vertex in middle line; Ratio length of mesonotum in middle line to length of pronotum 7.9, to length of pronotum and vertex combined 4.0. Forewing with ratio length to maximum width 2.8, vein Sc + R forking slightly proximally of vein Cu1 fork ( Fig. 31 ). Hindwings with ratio length to maximum width 1.8.

Male genitalia. Anal segment in dorsal view ( Fig. 35 ) as wide as long, apical margin incised in middle. Pygofer in lateral view ( Fig. 33 ) with dorsal margin distinctly shorter than ventral margin, posterior margin with a broadly rounded lobe near the middle; in ventral view ( Fig. 34 ) medioventral paired processes separated in the middle, apex hook-like. Genital style slightly longer than wide ( Figs 36, 37 ), subtriangalar, with two processes rising from approximately the middle of the dorsal margin and directed dorsad, apical margin broadly rounded; inner and outer surface with some scattered hair-like setae. Phallobase ( Figs 39–41 ) sheath-shaped, in ventral view ( Fig. 40 ) asymmetrical, distally slightly incised in middle, with a row of teeth along middle line; in dorsal view ( Fig. 41 ) with four strong processes near median area. Stem of connective with short membranous section at middle, close to base. Phallic appendages ( Fig. 42 ) slender, tubular, about three times longer than phallobase, apex distinctly shagreen especially the dorsal surface, left appendage apically obtuse, with large spine subapical beneath apex, right appendage pointed with large apical spine.

Type material. Holotype: 3, China: Guizhou, Yanhe, Mayanghe National Natural Reserve, 5 June 2007, X.- S. Chen; paratype: 1 3, Mayanghe National Natural Reserve, Yanhe, Guizhou, 6 Oct. 2007, Y.-J. Li.

Etymology. The species name is derived from the Latin words “ circumscripta ”, referring to the mesonotum with annular marking.

Distribution. China (Guizhou).

Remarks. This new species resembles K. improcera Chen, Yang & Wilson, 1989 , but differs from the latter in: mesonotum with a large dark brown marking surrounded by an annular dark brown marking (two smaller dark brown markings between tegula and lateral carinae in K. improcera ); anterior margin of anal segment in dorsal view with a single and shallow concave depression (with two posterior concave depressions in K. improcera ); and medioventral processes with the apex acute and shallow median fissure (rounded and deep median fissure in K. improcera ).

Figures

FIGURES 24 – 27. Kosalya circumscripta sp. nov. (24) Male habitus, dorsal view; (25) Male habitus, lateral view; (26) Male, head and thorax, dorsal view; (27) Male, frons and clypeus.

FIGURES 28 – 42. Kosalya circumscripta sp. nov. (28) Head and thorax, dorsal view; (29) Frons and clypeus; (30) Head, lateral view; (31) Forewing; (32) Hindwing; (33) Male genitalia, lateral view; (34) Male genitalia, ventral view; (35) Anal segment, dorsal view; (36) Right genital style, from inside; (37) Right genital style, from outside; (38) Anal segment, phallus, connective and style, left lateral view; (39) Phallobase, right lateral view; (40) Phallobase, ventral view; (41) Phallobase, dorsal view; (42) Apex of phallic appendages, right lateral view. Scale bars: = 1 mm (Figs 28, 30 – 33, 38); 0.5 mm (Figs 29, 34 – 37, 39 – 42).