2011/12/01 by T. B. Leonova, Т. Б. Леонова · 7 citations
Earth and Planetary Sciences · #Paleontology and Stratigraphy of Fossils #Geology and Paleoclimatology Research #Geological formations and processes
paper · doi:10.1134/s0031030111100029
This monograph analyzes all available data on the biostratigraphic and biogeographical distribution of Permian ammonoids and the ecological interpretation of morphological changes in this group. Ammonoid assemblages of various regions at successive stages of the Permian are examined. Four major stages are substantiated in the evolution of Permian ammonoids. The most contentious stages in the Permian evolution of the group are extensively discussed.