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Document Type

Research

Abstract

The unique Pennsylvanian nautilid Solenochilus springeri is described with reference to material from the lower Cherokee Group (Atokan or Desmoinesian) of Marion County, Iowa, and the Bloyd Formation (Morrowan) of northwestern Arkansas. The species was based originally on a specimen, now lost, from Adair County, Iowa; a neotype is selected from the Marion County collections. The detailed morphology of the pair of dorsolateral spines which characterize mature Solenochilus is described for the first time. These spines, whose length approximates the width of the mature body chamber, are hollow throughout. Each spine originated as a lateral expansion of a prominent dorsolateral ridge located on the umbilical shoulder.

Publication Date

1966

Journal Title

Proceedings of the Iowa Academy of Science

Volume

73

Issue

1

First Page

269

Last Page

278

Copyright

© Copyright 1966 by the Iowa Academy of Science, Inc.

Language

EN

File Format

application/pdf

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