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......

文章首次报道了纵纹腹小Ｘｉａｏ Ａｔｈｅｎｅ ｎｏｃｔｕａ不同亚种之间第１枚初级飞羽外羽及最外侧１枚小翼羽的斑纹特征，爪的累积长度及左脚中趾爪长的差异．增补了小......

Background:Many species of owls(Strigidae) represent cryptic species and their taxonomic study is in flux.In recent year......