描述3块新的标本，分别是节肢动物Pisinnocaris sp．，Tanglangia longicaudata Luo et Hu，1999和Pygmaclypeatus daziensis Zhang，Han et Shu，2000。新的标本进一步增进我们对其形态结构特征的了解。通过与相关属种的比较，简要讨论其系统位置问题。

From September to October in 2000, a fieldwork was carried out for more than one month at several sections, such as Ercaicun and Mafangcun sections in Haikou town, Kunming city, Maotianshan, Ma'anshan and Xiaolantian sections in Chengjiang County, Yunnan Province. During the fieldwork, some new specimens were collected. Among them, three specimens are found separately to be rare arthropods Pisinnocaris sp., Tanglangia longicaudata Luo et Hu, 1999 and Pygmaclypeatus daziensis Zhang, Han et Shu, 2000 reported recently from the Chengjiang Fauna. All materials belong to the Eoredlichia-Wutingaspis Zone of Yu'anshan Member, Heilingpu Formation, Qiongzhusi Stage, Lower Cambrian(Luo et al., 1994). They provide some additional information on their morphology. Systematic description and brief discussion are given as follows.

Q915.819