Paleozoic origin of the cycads /

Saved in:

Bibliographic Details
Author / Creator:	Mamay, Sergius H., 1920- author.
Imprint:	Washington : United States Department of the Interior, Geological Survey, 1976.
Description:	1 online resource (iii, 48 pages, 5 unnumbered pages of plates) : illustrations.
Language:	English
Series:	Geological Survey professional paper ; 934 Geological Survey professional paper ; 934.
Subject:	Cycads, Fossil. Paleobotany -- Paleozoic. Paleobotany -- West (U.S.) Cycads, Fossil. Paleobotany. Paleozoic Geologic Period. Southwest, New.
Format:	E-Resource U.S. Federal Government Document Book
URL for this record:	http://pi.lib.uchicago.edu/1001/cat/bib/11557389

Hidden Bibliographic Details
Other authors / contributors:	Geological Survey (U.S.), issuing body.
Notes:	Title from title screen (viewed October 6, 2014). "Megasporophylls and associated plant parts from the Upper Pennsylvanian and Lower Permian rocks of the southwestern United States are interpreted as a lineage of cycads, derived from the pteridosperms. Cycadean foliage is thought to be derived from Paleozoic taeniopterids." Includes bibliographical references (pages 44-46) and index.
Other form:	Print version: Mamay, Sergius H., 1920-. Paleozoic origin of the cycads
GPO item no.:	0624 (online)
Govt.docs classification:	I 19.16:934

Similar Items