Distinct layers are often visible in thick-walled resting cells such as chlamydospores or zygotes of Phycomycetes. 在厚壁休眠细胞如藻菌纲的厚孢子或接合子中明显的几层是常常能看见的。
The crude oil from Western Qaidam Basin has high quantity of rearranged sterane, regular sterane and 4-methyl sterane, which demonstrated that their source materials are mainly from phycomycetes. 柴西地区原油具有高含量的重排甾烷、常规甾烷、4-甲基甾烷,说明它们母质主要为菌藻类。