The evolution of Eocene planktonic foraminifera Dentoglobigerina
25 May 2021
We find that Dentoglobigerina evolved ∼4 million years earlier than previously documented, with the species Dentoglobigerina pseudovenezuelana and ‘Dentoglobigerina’ eotripartita recorded in middle Eocene, Zone E9.
Our findings suggest that there are two distinct lineages: (1) Dentoglobigerina, encompassing the species D. pseudovenezuelana and D. galavisi as a descendant of Subbotina; and (2) ‘Dentoglobigerina’ (including ‘D.’ eotripartita) as a descendant of Acarinina. Our results contribute to a better understanding of Dentoglobigerina biostratigraphy, phylogeny and evolution, and have implications for taxonomy.