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Bitter springs microfossils
苦泉微体化石
bitter springs microfossils
澳大利亚中部出露的、年龄约为8亿年的苦泉地层中发现的具微观结构的集合体。1965年首次采集的标本中查明至少有4大类生物,可能都是在晚先寒武纪时栖息于澳大利亚中部浅海中的。这几类生物类似细菌、丝状的蓝绿藻、绿藻和真菌。绿藻化石glenobotrydion中的细胞分裂显示,证明已经达到向有性繁殖和遗传变异进行的阶段。