Statistical And Morphological Studies Of The Late Cambrian Trilobite Species In Jingxi, Guangxi

In this study,the trilobites in the Guole biota of the late Cambrian were the main research objects.Through a lot of field work and indoor research,a large number of newly collected fossil specimens were subjected to paleobiological group statistics to quantify the The comprehensive appearance of various biological groups,statistical research found that the Guole biota has the largest number of brachiopods,accounting for 50.4%;trilobites are the second,accounting for 37.0%;soft tongue snails and echinoderms are ranked second and third,Accounting for 9.7% and 2.2%,respectively,and other species are rare and relatively rare.Detailed statistics on the differentiation of trilobites in the Guole biota.As the second dominant group in the Guole biota,trilobites have found more than 20 species with a very high degree of differentiation.The trilobite fossils that have been found all belong to the following five orders: Orbicularia,Pleurotus,Prionhead,Ctenoptera and Spectacles.Among them,Orboptera and Ctenoptera accounted for the largest proportions,with 32.9% and 29.8%,respectively,and the head-to-head order and the pleated echinococcidae ranked third(19.5%)and fourth(17.4%).The number is the smallest,accounting for 0.4%.The results show that,after experiencing the prosperity of the Cambrian period,the pleated beetle began to be gradually replaced by the Chrysopidae in the late Cambrian period,and the abundance and differentiation of the Chrysopidae surpassed that of the Chrysopida.Camping burrows have the most trilobites,the dominant species are Rhaptagnostus cf.R.(13.9%)and Tamdaspis jingxiensis(15.9%);the plankton living trilobites are second,the dominant species is Micragnostus chiushuensis(14.8%).The results show that burrowing and planktonic lifestyles are the main ways of survival of Guole trilobites.The results show that the burrowing and planktonic lifestyles are the main ways of survival of Trilobite Guole.This study also carried out a detailed systematic taxonomic study of Guole trilobite,and systematically studied and described the newly collected specimens of trilobite of Guole biota of 5 orders,13 families,19 genera and 23 species.Among them,4 new unspecified species were found,namely Neoagnostus sp.Indet.,Idolagnostus sp.Indet.,Haniwa sp.Indet.,Dictyella sp.Indet.,Which further revealed the trilobite animal in the Guole biota face.It has laid a good foundation for the subsequent comparative study of the global Cambrian biota.