The Cenomanian/Turonian boundary in light of new developments in terrestrial palynology

The Cenomanian/Turonian boundary interval is associated with an oceanic anoxic event (OAE 2, 94.0 Ma) during one of the warmest episodes in the Mesozoic. To date, plant responses to these climatic conditions are known only from the northernmid-latitudinal succession in Cassis, France. There, conifer-dominated and angiosperm-dominated vegetation types alternate.However, whether the exceptional environmental conditions had an impact on plant reproduction is unknown to date. Weapplied a new environmental proxy based on spore and pollen teratology on palynological samples from the Cassis succession,to explore if this phenomenon also occurs across the OAE 2. The observed frequencies of <1% malformed spores and pollengrains suggest that plant reproduction was not affected during the Cenomanian/Turonian boundary interval.