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The Development of Monograptus dubius and Monograptus chimaera

Published online by Cambridge University Press:  01 May 2009

Margaret Walker
Margaret Walker
Affiliation:
The Sedgwick Museum, Cambridge.
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Abstract

The growth of the rhabdosome from the initial prosicula is described for two species of Monograptus. Sections of the metasicula have shown the nature of the “Stillstandsgürtel” first described by Kraft, and in both species evidence about the structure of the interthecal septum is given. It appears that there are two forms of Monograptus dubius which have the same external appearance but differ in the details of early development.

Type
Articles
Information
Geological Magazine , Volume 90 , Issue 5 , October 1953 , pp. 362 - 373
Copyright
Copyright © Cambridge University Press 1953

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References

REFERENCES

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