Fossils of primitive flat animals have been found in the Anning region of Yunnan

◎ Zheng Yuan/Wen

The reporter recently learned that after several years of investigation and excavation and collection, a research team composed of Tang Feng, a researcher at the Geological Research Institute of the China Geological Survey, and a research team composed of many colleges and universities have found a new material of solid fossils with macrocarbon compressed film in the Anning area of Yunnan, named "Striped Hanging Bandworm" (Rugosusivitta orthogonia New Genus New Species).

Ecological restoration map of anning strip fossils

The fossil as a whole is macro-body ribbon-like, symmetrical on both sides, and has parallel arrangement, dense and neat horizontal and longitudinal stripes, and is mostly bent and preserved in the form of folding, indicating that the living body of the fossil organism is long and flat. The fossil is endowed with a porphyllite mezzanine 0.68 m below the porphyllite mezzanine between the two main phosphate ore layers, a geological age of 535.2 ± 1.7 Ma, close to the time of the earliest crowned chakra taxa, indicating that these fossils most likely represent an early prototype of the crested rotunda and are the most primitive fossil records of flatworms (flatworm Flatworms).

Fossils of anthropocetes opened up a new taxonomy of early flatworms, filling the fossil phyla between the Ediacaran fauna and the Cambrian fauna explosion. The researchers believe that the fossil provides biological entity evidence to explain the emergence of a large number of relic fossils at the end of the Idikla Period and the early Cambrian period; the formation of primitive flat animals has an important marker effect on the evolution of early organisms and stratigraphic comparisons; more in-depth excavation and study of the extended distribution of such striped fossils in space and space, compared with the widely distributed Claude tubular fossils and Shaanxi Trace Shaanxilithes fossils, it is expected that the new fossils will be used as marker fossils for the beginning of the Pactogen.