Robuta

https://www.usgs.gov/publications/benthic-foraminiferal-community-changes-across-miocene-climatic-optimum-identified Benthic foraminiferal community changes across the Miocene climatic optimum Identified by SHEBI... The Calvert Cliffs, MD, an iconic section of Middle Miocene strata, have been well studied both paleontologically and stratigraphically for over a century....