Coxall, Helen K.; Wilson, Paul A.; Pearson, Paul N. and Sexton, Philip F.
Iterative evolution of digitate planktonic foraminifera.
Paleobiology, 33(4) pp. 495–516.
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Digitate shell morphologies have evolved repeatedly in planktonic foraminifera throughout the Cretaceous and Cenozoic. Digitate species are usually rare in fossil and modern assemblages but show increased abundance and diversity at times during the Cretaceous and mid- dle Eocene. In this paper we discuss the morphology and stratigraphic distribution of digitate planktonic foraminifera and establish the isotopic depth ecology of fossil ones to draw parallels with modern counterparts.
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