Morphology and arrangement of meromes in Ischadites dixonensis, an Ordovician Receptaculitid

Resource Information

The work Morphology and arrangement of meromes in Ischadites dixonensis, an Ordovician Receptaculitid represents a distinct intellectual or artistic creation found in Internet Archive - Open Library. This resource is a combination of several types including: Work, Language Material, Books.

Label

Morphology and arrangement of meromes in Ischadites dixonensis, an Ordovician Receptaculitid

Statement of responsibility

Daniel C. Fisher -- and Matthew H. Nitecki --

Title variation

Meromes in Ischadites

Creator

• Fisher, Daniel C

Contributor

• Nitecki, Matthew H.

Joint author

• Nitecki, Matthew H.

Subject

• Ischadites dixenensis
• Paleobotany -- Illinois
• Paleobotany -- Ordovician

Language

eng

Summary

Ischadites dixonensis (Miller and Gurley, 1896), from the Ordovician Galena Group of Illinois, is the oldest described North American ischaditid. The holotype is exceptionally well preserved and provides information on merome head morphology, articulation, and arrangement on the surface of the thallus. Meromes occur in whorls and form an equal number of dextral and sinistral parastichies. Each parastichy begins either at one of the heads surrounding the basal pole or at a triangulum, and extends to the margin of a clearly demarcated apical lacuna. The unusually complete morphological characterization that is now available for I. dixonensis will play an important role in discussions of receptaculitid morphogenesis and orientation

Member of

• Publication (Field Museum of Natural History), 1283
• Fieldiana, Geology, v. 39, no. 2

Cataloging source

YSM

Illustrations

illustrations

Index

no index present

Literary form

non fiction

Nature of contents

dictionaries

Series statement

• Publication 1283
• Fieldiana.Geology

Series volume

v. 39, no. 2