Two new genera with two new species of sawflies,Cathayxyela extensa gen.et sp.nov.and Aequixyela immensa gen.et sp.nov.,......

为探究吕家坨井田地质构造格局,根据钻孔勘探资料,采用分形理论和趋势面分析方法,研究了井田7......

The bivalved arthropod Branchiocaris? yunnanensis Hou, 1987 is redescribed on the basis of new fossil material from the ......

The evolutionary success of arthropods, the most abundant and diverse animal group, is mainly based on their segmented b......