It is generally accepted that conodonts went extinct at the end of Triassic, but younger conodont fossils have been reported, and it becoming clear extinction occurred asynchronously across different regions. Although some reports post-Triassic disproven, Lower Jurassic found in Buda area Hungary Inuyama Japan. Here, we report discovery more Misikella posthernsteini above first occurrence typic...

Abstract It remains unclear whether waning of the volcanic degassing CO2 source or enhancement mafic (Ca, Mg-silicate) weathering sink, both, caused global cooling leading to Ordovician greenhouse–icehouse transition. We present a uniquely age-constrained and integrated Middle–Late (470–450 Ma) continental isotopic proxy data set (87Sr/86Sr ?Nd(t)) from carbonate rocks Antelope Range central Ne...

Redox variations across the Permian-Triassic boundary (PTB) have long been debated, especially during proliferation of PTB microbialites. Here, we report redox fluctuations to evaluate links between two based on pyrite framboid analysis from basin platform settings in South China. During end-Permian extinction, abundant framboids indicate a widespread anoxia that was likely direct cause extinct...

The role of teeth and jaws, as innovations that underpinned the evolutionary success of living jawed vertebrates, is well understood, but their evolutionary origins are less clear. The origin of teeth, in particular, is mired in controversy with competing hypotheses advocating their origin in external dermal denticles ("outside-in") versus a de novo independent origin ("inside-out"). No evidenc...