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Nannoconus (∼ 5–20 µm) was a major planktonic producer in the Early Cretaceous seas (∼ 150–120 Ma). The heavy calcitic skeletons (micaliths; ∼ 200–1400 picogram) of this extinct nannoplankton genus have contributed to ma...
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Nannoconus (~5-20 µm) is characterized by the heaviest skeleton among the calcareous nannofossils present during the Early Cretaceous (~152-120 Ma), making them the major planktonic bio-calcifier for this time period. Th...