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通过扫描电镜重新研究产自冀北丰宁满族自治县花吉营下白垩统西瓜园组的花吉营丰宁叶肢介(Fengninggrapta huajiyingensis)的正型标本。电镜照相揭示以前光学照相无法分辨的重要分类特征,其中包括:1)胎壳附近窄生长带上的小到中网装饰和密而细的线脊夹小网装饰;2)胎壳附近生长线上的小网装饰;3)靠腹边缘生长带粗壮线脊下端向下接近生长线时膨胀变成三角形“滨生长线瘤”。从而修定丰宁叶肢介的特征描述。
The positive samples of Fengninggrapta huajiyingensis from Huayiying Cretaceous Xiuganyuan Formation in Huajiying, Fengning Manchu Autonomous County, Hebei Province were re-investigated by scanning electron microscopy. Electron microscopy revealed important classification features that were previously unidentified by photographic photography, including: 1) small to medium nettings on narrow growth bands near the carcasses, and small and dense netted spinelets; 2) growth lines near the carcasses On the small net decoration; 3) by the abdominal edge of the growth zone with a thick ridge line down near the growth line when the expansion into a triangle “Shoreline tumor.” Thus fix Fengning leaf exposition characteristics described.