A large number of fossil fungi (sage bacteria) have been found on Shanxi Yangquan.

The charcoal-two-fold period is one of the most important coal-forming periods in geological history, but the reasons for the formation of a large number of industrial coal seams in this period are different.
One of the generally accepted ideas is that the evolution of umbrella fungi with the ability to break down the meth is slow, resulting in a large number of plant remains that could not be decomposed during this period, resulting in a large amount of peat accumulation, which in turn formed a huge thick coal seam.
recently, Wan Mingli, Ph.D., Nanjing Institute of Geology and Paleontology of the Chinese Academy of Sciences, and Wang Jun, researchers, collected a large amount of fossil wood in the upper part of the Taiyuan Group on Shanxi Yangquan, China.
After indoor slivering and micro-observation, it was found that a large number of fossil fungus myceliums were found in the myelin and primary wood of a Kodak plant stem (Shanxioxylon sp.), which were forked and separated, and also preserved the lock-like joint structure unique to the parasites.
this particular structure, fungi in the stems of Koda plants are identified as Basidiomycetes.
in modern terrestrial ecosystems, the slugs are one of the most important decomposors and the most important fungal groups that break down ligands in plants.
In the course of previous research on a fossilized wood in the late diocysts of the Angara plant area of China, the team has found that the detailed process of selective decomposition of wood tube cells by the fungi of the burden, that is, the intercellulose layer with higher litopic content is degraded first, followed by the breakdown of the primary wall with higher cellulose and hemicellulose content, and finally the decomposition of the secondary wall.
the record of fungi throughout the late Paleontology was very rare, which is the main reason for the formation of the "fungal evolution lag into coal theory".
current research reveals that as early as the second world (and possibly even earlier), the ligand bacteria with ligand decomposition ability have appeared in the terrestrial ecosystem dominated by Chinese flora in northern China.
The real reason for the formation of a large amount of coal in China's North China Charcoal-Ii-2 Stacking Era is not the "evolutionary hysteria" of umbrella fungi, but more likely to be the result of the special geographical location of the North China plate, the large number of flora, humid climate and suitable sedimentary environmental system.
results were recently published in the international geoscical journal Palaeogeography Palaoclimatology Palaeoecology.
the study was supported by the Chinese Academy of Sciences, the National Natural Science Foundation of China and the National Key Laboratory of Modern Paleontology and Stratology.
: Wan, M., Yang, W., He, X., Liu, L., Wang, J., 2017.First Record of the fossil basiomycee clamp connections in cordaitalean stems from the lower Permian Shanxi Province, North China.Palaeogeography Palaoclimatology Palaeoecology, 466,353-260.doi:10.1016/j.palaeo.2016.11.050.