Suljuktocossus yinae, Wang & Ren, 2007

Wang, Ying & Ren, Dong, 2007, Revision of the genus Suljuktocossus Becker-Migdisova, 1949 (Hemiptera, Palaeontinidae), with description of a new species from Daohugou, Inner Mongolia, China, Zootaxa 1576 (1), pp. 57-62 : 58-61

Suljuktocossus yinae sp. nov.

( Figs. 1 , 2 )

Diagnosis: Forewing with M 1+2 separated distad of M 3+4, m 4 -cua slightly S-shaped and m-cua connected with M at the point of M arising from R+M. Hind wing as for genus.

Description. Body compressed with both forewings and hind wings. Thorax and abdomen preserved, but obscure. One leg, probably hind leg, partly preserved. 2 segments of tarsi and second longer than first. Pretarsus visible.

Forewing length 56mm, width 27mm. Anterior margin blurry indented where nodal line reaches margin. CP present and ending at nodal indentation. Sc without branches, paralleling R+M for long interval and curved slightly upwards slightly before point of R+M separation, fused with R 1 beyond point of R division into R 1 and Rs. R+M arising basally. R bifurcating at same level of M separation into M 1+2 and M 3+4. M 1+2 separated distad of M 3+4, and divided into M 1, and M 2 slightly before indentation. M 1 connected with Rs by short crossvein r-m. Crossvein m-cua connected with M at point of M separation from R+M. Stem of Cu short at base, forking into CuA and CuP. CuA curved when meeting crossvein m-cua, and bifurcating into CuA 1 and CuA 2 distad of M separated into M 1+2 and M 3+4, but basas of M 3+4 bifurcation. Crossvein m 4 -cua slightly S-shaped and connected with CuA at point of CuA forking. CuP departing from Cu basally and slightly curved before reaching margin. Clavus small with 2 anal veins. A 2 with 2 branches, shorter branch curved downward to margin at base; longer branch fused with A 1 little before distal end of clavus. Nodal line traceable as indentation fused with R 1 for a short distance and cutting Rs little beyond point of Sc fusing with R 1, then reaching M just beyond M fork, finally fused with m 4 -cua to connection with CuA 2, following latter for a short distance and then reaching CuP at distal end of clavus.

Hind-wing length 35mm, width 25mm. Hind-wing with obvious indentation. Sc arising basally, fused with R at the point of R branching into R 1+2 and Rs, and extended a short distance, curved upwards single to indentation. R parallel Sc before branching into R 1+2 and Rs. R 1 arising from R 1+2 at same level of indentation, then subparallel to Sc before ending at costal margin. R 2 flattened before reaching costal margin above apex of wing. Rs curved and fused with M 1 for a long interval after dividing from R. M 4-branched. M 1 separated from M basally, and slightly convex before fusing with Rs. M 2 straight and arising from M after the point of M 1 separated from M. Stem of M 3+4 long, connected with CuA by short crossvein m 3+4 -cua and little curved when crossvein meeting M 3+4. M 3+4 branched into M 3 and M 4 at same level of indentation. CuA bifurcated slightly basad than M 3+4. CuP simple. A 2-branched. A 2 short and curved downwards to anal margin near base. Both forewings and hind wings with distinct color pattern consisting of regular dark patches on a pale ground.

Etymology: This species is named after Miss. Yin Ruiyue who collected this fossil and donated it to us.

Material: The new species is established based on compressed body with a pair of forewings and hindwings. Holotype: Both forewings and hind-wings, part and counterpart, No.: CNU-H-NN2007001-1, CNU-H- NN2007001-2.

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

Remarks: This species is assigned to Suljuktocossus by the main characters of forewing, such as CP present, Sc arises from basal single and parallel R before fusing with R 1, crossvein r-m short, the nodal line developed, are consistent with the type species.

The new species can be distinguished from the type species in the following features on the forewing: a short crossvein r-m near indentation, m 4 -cua slightly S-shaped and m-cua connected with M at the point of M arising from R +M.

This species is also similar to S. chifengensis Wang, Zhang and Fang, 2007 , but it is different from the latter in the following features on the forewing: M forking near indentation and M 4 not sharply curved.

Figures

FIGURE 1. Suljuktocossus yinae sp. nov., holotype: A, photograph of part, No. CNU-H-NN2007001-1; B, photograph of counterpart, No. CNU-H-NN2007001-2.

FIGURE 2. Suljuktocossus yinae sp. nov., line drawing of holotype, No. CNU-H-NN2007001-1. ts. tarsus; ptar, pretarsus.