云南武定、录劝交界处的人民桥下奥陶统红石崖组中发现丰富的几丁虫(Chitino- zoanS)疑源类(Acritarchs)和虫颚(Scolecodonts)化石。疑源类已交付出版,本文仅就几丁虫研究结果予以报导。人民桥下奥陶统红石崖组几丁虫计有16属,50种和亚种 (包括未定种),其中四个新种;这是我国关于早奥陶世几丁虫较早的报导之一。 Yunnan Wuding, recorded advised the junction of the People’s Bridge in the Lower Ordovician Hongshiya group found in the Chitinian (Chitinozoos) Acritarchs and insect jaw (Scolecodonts) fossils. Doubtful class has been delivered and published, this article only to report the results of chitin research. There are 16 genera, 50 species and subspecies (including undetermined species), of which four species are found in the Lower Ordovician Hongshiya Formation of the People’s Bridge. This is one of the earliest reports about the Early Ordovician chitin in China .