Article: Some Mesozoic adherent foraminifera

The relationships between certain common Mesozoic species of adherent foraminifera are discussed. The wall structure appears to be the deciding factor in the correct placing of these genera. One new genus Arenonina, with type species Arenonina cretacea sp. nov., is proposed. An account of the evolution of the Bullo-pora-Vitriwebbina group is given. Most of the important species of Mesozote adherent foraminifera are figured, although full synonymies are not considered desirable at this stage in our knowledge.