Key species of New Zealand calcareous nannofossils

Abstract
A genus, Hornibrookina, and three species, Conococcolithus panis, Hornibrookina teuriensis and Reticulofenestra hampdenensis, are described as new from the New Zealand Paleogene; an existing genus, Reticulofenestra, is redefined. Several technical terms are introduced and a new tentative suprageneric classification of the Cenozoic calcareous nannofossils offered.