Lapideacassaceae Bown & Young 1997

Edited by Lyndsey on Mon, 14/03/2011 - 11:01

Lapideacassaceae Bown & Young 1997

Description: Hemispherical to cylindrical nannoliths, with walls constructed from one to several cycles of thin elements, enclosing a hollow central space; the nannolith tapers distally, and may have long apical spines or processes.

Remarks: Rare and sporadic stratigraphic distribution, but Cretaceous/Tertiary boundary survivor.

Geological Time Data

Geological Time Periods:

Eocene

Cretaceous

Biblio Reference:

Perch-Nielsen, K. 1985. Mesozoic calcareous nannofossils. Plankton Stratigraphy. 1. Planktic foraminifera, calcareous nannofossils and calpionellids:329-426.