•  
  •  
 

Authors

A. O. Thomas

Document Type

Research

Abstract

This type of cephalopod began in the Devonian and became the fore-runner of the Mesozoic ammonites. A few species occur in the Devonian, Mississippian, and Pennsylvanian rocks of Iowa. The relationships and significance of these are pointed out.

Publication Date

1924

Journal Title

Proceedings of the Iowa Academy of Science

Volume

31

Issue

1

First Page

340

Last Page

340

Copyright

©1924 Iowa Academy of Science, Inc.

Language

en

File Format

application/pdf

Share

COinS
 
 

To view the content in your browser, please download Adobe Reader or, alternately,
you may Download the file to your hard drive.

NOTE: The latest versions of Adobe Reader do not support viewing PDF files within Firefox on Mac OS and if you are using a modern (Intel) Mac, there is no official plugin for viewing PDF files within the browser window.