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TWO NEW MIDDLE TRIASSIC GENERA AND SPECIES OF PERMOCHORISTIDAE (INSECTA, MECOPTERA) FROM TONGCHUAN REGION, SHAANXI PROVINCE, CHINA
Pages: 697-701
Year: Issue:  4
Journal: ACTA ZOOTAXONOMICA SINICA

Keyword:  长翅目二叠蝎蛉科新属新种中三叠世铜川组陕西省;
Abstract: 记述中国陕西中三叠统铜川组二叠蝎蛉科Permochoristidae Tillyard,1918 2新属及2新种:陕西蝎蛉属Shaanxichorista gen.nov.,何家坊陕西蝎蛉S.hejiafangensis sp.nov.和化石蝎蛉属Choristites gen.nov.,马廷生化石蝎蛉C.matinsoni sp.nov.,前一新属以其翅呈近三角形;Sc很长,伸达R端部,带3支脉;Rs与MA各自带2支;Rs+MA主干明显短于MA;MP带5支,很早与Sc+R+MA汇合,之后与之分离,又与CuA汇合,形成一支合并脉M+CuA;Pt不明显等特征与中蝎蛉属Mesochorista、秦蝎蛉属Qinochorista区别.后一新属以其翅呈近卵形;Sc、Rs很长,伸达R端部;Sc带6支脉;Rs与MA各自带2支;MA柄稍短于Rs+MA主干;MA基部弯曲;MP带5支,基部弯曲,直接与CuA汇合,形成R+MP+CuA;Pt不明显等特征的脉序结构可与中蝎蛉属Mesocho-rista、里阿斯蝎蛉属Liassochorista明显区别.新属、种系陕西昆虫群(属中三叠世陕西生物群、也是陕西动物群的一个化石门类)铜川昆虫组合的新成员.时代相当于欧洲拉丁尼期(或阶)(Ladinian Stage).
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