Textural Observations on Some Living Species of Planktonic Foraminifera

Cifelli, Richard. Textural Observations on Some Living Species of Planktonic Foraminifera. Smithsonian Contributions to Paleobiology, n u m b e r 45, 45 pages, 15 plates, 1982.—Wall textures of 11 species of spinose and quasi-spinose planktonic foraminifera collected in plankton tows from the Nor th and Equator ia l Atlantic have been studied with the scanning electron microscope. Il lustrations and descriptions of these textures are given herein. Dur ing the ontogeny of the individual the chamber wall thickens and the texture is modified in various forms. Thickening occurs by the addit ion of sheet-like laminat ions and clustering of crystallites that generally develop into ridges a m o n g the pores. Patterns of textural development vary among species, but there are some common trends. OFFICIAL PUBLICATION DATE is handstamped in a limited number of initial copies and is recorded nVa G r S n . , , U t , ° n * " " * "*"* M k m i m * " • S E R ' E S C O V E R TM^*8ttef^ i ^ T f y °f Congress Cataloging in Publication Data Cifelli, Richard. Textural observations on some living species of planktonic foraminifera (Smithsonian contributions to paleobiology • no 45} Bibliography: p. ' Supt. of Docs, no.: SI 1.30:45 ' SSS^rljS£^%jLSffT^\^^ 3 Foraminifera-Mor_ Pholog. 7. Proloroa-AtlLlfc'Sn \ T X * Vser . : ^ ^ & * — * QE701.S56 no. 45 [QL368.F6] 560s 8.-607840 & f i S w 4 7 1 ] AACR2