Some features of the permian-triassic gastropod faunas in China

摘要

In the present paper there are the statistical figures for the genera and the species of the fossil gastropods from Permian and Triassic in Chin. During Permian, 105 genera of the fossil gastropods lived, among them, 89 ones became extinct before the end of Permian. Thus, their rate of extinction amounted to about 85/100. During Triassic, 117 genera of the fossil gastropods lived, among them, 101 ones were newly born. Thus, their rate of regeneration accounted to about 87/100.