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Document Type

Research

Abstract

The most abundant fossil in the upper part of the Wapsipinicon beds at Independence and elsewhere in east central Iowa is a fine-ribbed representative of Atrypa reticularis (Linn.). This species is found in every fossiliferous horizon in the Devonian or the state. Indeed, it is worldwide in its distribution and is the "longest lived of all known organisms," ranging from early Silurian through the Devonian into the early Mississippian.

Publication Date

1916

Journal Title

Proceedings of the Iowa Academy of Science

Volume

23

Issue

1

First Page

173

Last Page

177

Copyright

©1916 Iowa Academy of Science, Inc.

Language

en

File Format

application/pdf

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