Quadraticossus eumorphus, Wang, Ying, Wang, Lin & Ren, Dong, 2008

Wang, Ying, Wang, Lin & Ren, Dong, 2008, Revision of genera Quadraticossus, Martynovocossus and Fletcheriana (Insecta, Hemiptera) from the Middle Jurassic of China with description of a new species, Zootaxa 1855, pp. 56-64 : 57

Quadraticossus eumorphus sp. nov.

Figs.1 , 2

Diagnosis. Hind wing with Sc extended to costal margin shortly beyond point of fusion with R, and Rs confluent with M1 for short interval.

Description. Hind wing broad. Sc fused with R at branching point of R1+2 and Rs, then extended to costal margin. R1 arising from R1+2 at level of indentation, and nearly parallel with Sc but reaching costal margin slightly acclivitous. M 3-branched. M1 slightly extended upward after arising from M1+2 and downward after connecting with Rs for short interval. M3+4 unbranched. CuA gently bifurcating before level of indentation. A short crossvein m3+4-cua connected with M3+4 at level of M1+2 forks. CuP simple. Anal vein single.

Hind wing 20 mm long; 12 mm wide.

Etymology. The species epithet is a Latin eumorphus , beautiful, referring to the complete and beautiful features of the specimen.

Material examined. Holotype: A single hind wing, No. CNU-H-NN2007006.

Horizon and locality. Jiulongshan Formation, Middle Jurassic, Daohugou Village, Ningcheng County, Inner Mongolia in China.

Remarks. This species is assigned to Quadraticossus Wang & Ren, 2007 by the main characters of hind wing, such as hind wing small, stem of M1+2 long, M3+4 unbranched and anal vein single.

The new species can be distinguished from the type species in following features on the hind wing: Sc extended to costal margin soon after fused with R at one point, and Rs coalesced with M1 for short interval.

Figures

FIGURE 1. Quadraticossus eumorphus sp. nov., photograph of holotype, No. CNU-H-NN 2007006.

FIGURE 2. Quadraticossus eumorphus sp. nov., line drawing of holotype, No. CNU-H-NN 2007006.