Cicadocoris varians Dong, Yao & Ren

Dong, Qiuping, Yao, Yunzhi & Ren, Dong, 2012, A new species of Progonocimicidae (Hemiptera: Coleorrhyncha) from northeastern China, Zootaxa 3495, pp. 73-78 : 74-76

Cicadocoris varians Dong, Yao & Ren , sp. nov.

( Figs 1–3 )

Material. Holotype, male, CNU-PRO-NN2011079PC (part and counterpart), a well-preserved specimen, with most of the body preserved and two relatively clear tegmina.

Type formation and locality. Jiulongshan Formation, Middle Jurassic, Daohugou Village, Ningcheng County, Inner Mongolia, China.

Etymology. From Latin varians = diverse, variate, referring to the asymmetrical elytra.

Diagnosis (male). Head small, 0.35 times as wide as pronotum; metatibia with two large movable conical spurs; basitarsomere twice as long as mid tarsomere; abdomen with laterosternites about 5.5 times narrower than sternites; branches dSc, R1, and Rs not parallel and almost evenly spaced.

Description. Head 0.39 times as wide as pronotum; eyes oval with interocular space about 1.37 times width of eye diameter in dorsal view. Antennae base near to postclypeus. Postclypeus rounded, convex, and laterally indented from much smaller subtriangular anteclypeus. Semicircular lora completely separated. Rostrum obscure. Pronotum 3.5 times as wide as long, trapeziform, its transverse angles rounded and lateral sides slightly arcuate. Scutellum 2.1 times shorter than pronotum at the median line and 1.1 times as wide as long. Mid femora 1.2 times thicker than mid tibiae; hind coxae enlarged and transverse. Hind tibiae slightly thinner than hind femora, with two large movable conical spurs, these 1.5 times longer than diameter of tibiae, one near its base, other at about its midlength; apices of hind tibiae swallow-tailed and bearing teeth. Hind tarsi three-segmented, basitarsomere twice length of mid tarsomere; apices of first two tarsomeres swallow-tailed and bearing teeth. Pygophore barrel-shaped, narrowing caudad. Left and right tegmen of unequal size ( Fig. 3 ). Right tegmen 0.82 times shorter than left one.Tegmina rounded apically, with apex at M3+4, anterior margin weakly arcuate, precostal carina narrow and nearly horizontal, costal area wide, slightly expanding toward dSc; dSc oblique, slightly convex; stem R slightly convex at the point of dSc origin and then running parallel to costal margin, dividing into R1 and Rs basal of M forking. Branches dSc, R1 and Rs not parallel and almost evenly spaced; arculus short and subtransverse; M1+2 fork is before r-m; M1 close to M2; M2 nearly straight. M3+4 longer than stem M-Stem. CuA beyond arculus and slightly curved posteriorly. CuA2 transverse. Length of radial cell 2.8 times shorter than tegmen; length of basal cell 2.3 times shorter than medial cell. Abdomen roughly oval, much longer than wide, with the 4th sternite broadest. Abdominal laterosternites about 5.5 times narrower than sternites. Pygophore barrel-shaped, narrowing caudad.

Measurements (in mm): CNU-PRO-NN2011079PC (male): Body length 5.00, maximal width of body 1.38; head length 0.33, width 0.63; pronotum length 0.46, width 1.58; length of fore leg: femur 0.63; length of middle leg: coxa 0.33, femur 0.83; length of hind leg: coxa 0.42, femur 0.84, tibia 0.96, tarsomeres I–III: 0.25, 0.13, 0.17; right tegmina: length 3.25, width 1.46; arculus 0.08; dSc 0.42; R1 0.54, Rs 0.83; M1 1.04, M2 1.25, M3+4 1.46; CuA1 1.46, CuA2 0.17, av 1.29, 1A 0.42, Pcu 1.17; left tegmina: length 3.96, width 1.29; arculus 0.04; dSc 0.38; R1 0.58, Rs 0.92; M1 1.17, M2 1.38, M3+4 1.71; CuA1 1.75, CuA2 0.13, av 1.63, 1A 0.50, Pcu 1.42.

Remarks. The venation of Cicadocoris varians is most similar to that of C. lini in its tegmina having branches dSc, R1, and Rs almost evenly spaced and the M1+2 fork positioned before the r-m; however, it differs in the following features: right tegmen longer and wider than left tegmen (vs. right and left tegmina same in C. lini ); branches dSc, R1, and Rs not parallel (vs. branches dSc, R1, and Rs parallel in C. lini ); costal area not widened to dSc (vs. the costal area widen to dSc); and ratio of length to width of radio-radial cell is 2.5 to 1 (about 3.8 as long as wide in C. lini ). Compared with C. lini ’s body structure, width and length of scutellum are same size (vs. width obviously longer than length in C. lini ); basitarsomere twice as long as mid tarsomere (2.5 times in C. lini ).

Figures

FIGURE 1. Photographs of Cicadocoris varians sp. nov., A, Holotype, CNU-PRO-NN 2011079 P; B, Holotype, CNU-PRO- NN 2011079 C. Scale bar = 1 mm.

FIGURE 2. Cicadocoris varians sp. nov. Line drawings of the holotype, CNU-PRO-NN 2011079 PC. A, Dorsal view of body with wings; B, Ventral view of body with wings. Scale bar = 1 mm.

FIGURE 3. Cicadocoris varians sp. nov. Line drawing of wing showing vein nomenclature, CNU-PRO-NN 2011079 PC; ap—appendix, ca—costal area, pc—precostal carina, b—basal cell, m—medial cell, r—radial cell. Scale bar = 1 mm.