Pelagic standard conodont biozonation is less applicable to nearshore shallow-water depositional settings close the peritidal, where it needed establish its own zonation. The Upper Devonian Xiejingsi Formation in South China an important unit for biostratigraphy investigation as deposits argillaceous-carbonate mixed facies which yield numerous marine fossils. 25 species belonging 6 genera of pl...

During the Late Devonian Biodiversity Crisis, the primary driver of biodiversity decline was the dramatic reduction in speciation rates, not elevated extinction rates; however, the causes of speciation decline have been previously unstudied. Speciation, the formation of new species from ancestral populations, occurs by two primary allopatric mechanisms: vicariance, where the ancestral populatio...

This paper attempts to allocate a segment of the Paleozoic Ocean situated in what is now Southeastern Europe (SEE) into regional geological and paleotectonic synthesis connecting sedimentary, metamorphic igneous records associated with ocean’s cycle. The Supragetic basement (external section Carpatho-Balkan arch) represents tectonically reworked vestige Neoproterozoic–Lower oceanic floor system...