Gansucossus pectinatus ( Hong, 1982 ) Hong, 1982

Wang, Bo, Zhang, Haichun & Fang, Yan, 2006, Gansucossus, a replacement name for Yumenia Hong, 1982 (Insecta, Hemiptera, Palaeontinidae), with description of a new genus, Zootaxa 1268, pp. 59-68 : 61-62

Gansucossus pectinatus ( Hong, 1982) comb. nov.

Yumenia pectinata Hong, 1982: 81 , pl. 33, fig. 5, text­fig. 59; by original designation. Plachutella pectinata ( Hong, 1982) : Ren 1995: 65.

Shurabocossus pectinatus ( Hong, 1982) : Zhang 1987: 319.

Revised diagnosis. Hind wing oval, length/width ratio 1.5; costal area length/width ratio 3.6, maximal width in basal half; nodal indentation basal 0.4 wing length; m­cua short and nearly transverse.

Age and occurrence. Lower­Middle Jurassic, Dashankou Group; Subei County, Yumen City, Gansu Province, China.

Remarks. Judging from the original photograph of G. pectinatus ( Hong, 1982, pl. 33, fig. 5), A1 is unequivocally present in this specimen, and almost undoubtedly terminates in the anal margin although the latter is slightly damaged. This character together with others as diagnosed above makes the genus Yumenia Hong, 1982 tenable. However, the generic name Yumenia has already been used for a subgenus of Ostracoda ( Hou, 1958) , so it is replaced ( ICZN, 1999: Article 52.2) by a new name Gansucossus, proposed above.