- GeoRef, Copyright 2004, American Geological Institute.
Well-preserved, silicified Obruchevella from the earliest Cambrian (Meishucun Stage) sequence from Meishucun Section in Yunnan Province, China contains distinct cross-partitioning. This suggests that this helically coiled microfossil is the remains of an oscillatorialean cyanophyta. Obruchevella is a microfossil that exhibits a variety of form that may be produced through degradation. Obruchevella identified in the Meishucun Section includes O. parva, O. parvissima, O. delicata, O. meishucunensis and several other morphs which are yet to be identified.--Modified journal abstract.