缅甸北部白垩纪中期克钦琥珀华翅蝉科(昆虫纲,半翅目)新材料

NEW MATERIAL OF SINOALIDAE(INSECTA,HEMIPTERA)IN MID-CRETACEOUS KACHIN AMBER FROM NORTHERN MYANMAR

根据产自缅甸北部白垩纪中期克钦琥珀中的一块昆虫化石标本,建立了1新种--克钦雅翅蝉(Ornatiala kachinensis sp.nov.),归于华翅蝉科(Sinoalidae Wang and Szwedo,2012)。根据新化石材料,对雅翅蝉属的鉴别特征进行了修订。此外,利用支序分类学分析手段对新种的生物系统学地位进行了确定,并对华翅蝉前翅色型、翅脉变异等问题进行了探讨。新材料的发现进一步证实克钦琥珀生物群中的华翅蝉生物多样性程度较高,为优势昆虫类群。

The extinct family Sinoalidae(Hemiptera:Cicadomorpha),as one of the primitive representatives of Clypeata,belongs to the froghopper superfamily Cercopoidea.This family was previously recognized from the uppermost Middle to lowermost Upper Jurassic of northeastern China,and very recently reported in the mid-Cretaceous Kachin amber from northern Myanmar,with three genera and species erected(Fangyuania xiai,Jiaotouia minuta and Ornatiala amoena).The present study described and illustrated the second species of the genus Ornatiala based on one single fossil specimen trapped in a piece of Kachin amber.Our new phylogenetic analysis further confirms the systematic position of the new taxon.Prominent color patterns on tegmina have different functions for insects,such as sexual attraction,mimicry and camouflage.Most reported sinoalids possess monochromatic tegmina;the new species described herein,however,bears tegmina with highly contrasting color pattern(probable disruptive colouration)as the type species of Ornatiala.The bifurcation of tegminal MP of the new species is migrated to wing apex,apicad of the bifurcation of CuA and claval apex,which is distinctly different from that of Ornatiala amoena as well as most known sinoalids.Nevertheless,considering that relative branching position of longitudinal veins are instable for some early cercopoids,whether this morphological character is a diagnostic trait of the new species should be further checked on the basis of additional fossil data.Our new material further explores the diversity of Sinoalidae,and also provides some new information on the taxonomy,ecology and evolution of the highly abundant Mesozoic Clypeata:Cercopoidea.