Abstract
SinopalaeocossusHong, 1983 and related genera (Hemiptera, Palaeontinidae) are revised on the basis of newly discovered materials from the Middle Jurassic of Daohugou, northern China. The genusHamicossusWang and Ren, 2007 is considered to be a junior synonym ofSinopalaeocossus, resulting inS. laevis(Wang and Ren, 2007), comb. nov. The new speciesSinopalaeocossus amoenusChen, Zhang and Wang is described based on fore and hindwings. TheSinopalaeocossusand related genera resembleMartynovocossusWang and Zhang, 2008 and were likely derived from the latter. TheSinopalaeocossusand related genera bear high diversity on wing venations. As compared toMartynovocossus, the crossveinm3+4-cuaof hindwing is absent forSynapocossusWang, Shih and Ren, 2013 and certain species ofSinopalaeocossus, and the crossveinr-mof forewing is absent forSynapocossus. The rapid evolution of wing venations is likely due to intense predation pressures of the newly evolved flying and insectivorous vertebrates.
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