 the late Paleozoic experienced significant climate change, with some aspects resembling those of the late Quaternary and the Modern Era. This paper examines the use of marine bivalves as indicators of these changes in the Permian of Northeastern Asia. Bivalve species diversity was used as an additional criterion for recognizing climatic changes in the Permian of Northeastern Asia. It was found that, in general, the temperatures were quite favorable for the fauna in the region. During the Rohedian Wordian, there was a depletion of benthonic communities dominated by Innosyramus-like bivalves, indicating a cooling event. Two further cooling events were also observed at the beginning and end of the Capitanian. In the late Wuchia-Pingian and late Changzingian, warming events were recorded, indicated by the invasion of tropical taxa into the basins of northeastern Asia and by paleothermometry. These findings suggest that marine bivalves can be used as a reliable indicator of climatic changes in the Permian of northeastern Asia. This article was authored by AS Bayakov. We are article.tv. Links in the description below.