https://digitalcommons.usf.edu/geologia/vol58/iss2/art3/
"Early heterohelicid evolution" by Marius D. Georgescu
Three Late Cretaceous lineages of heterohelicid planktic foraminifera, which evolved in the proximity of the Cenomanian/Turonian boundary, bring new data in...
earlyevolutionmariusgeorgescu