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Ultrastructural studies of graptolites – a review

Published online by Cambridge University Press:  01 May 2009

R. B. Rickards ,
P. R. Crowther  and
A. J. Chapman
R. B. Rickards
Affiliation:
Sedgwick MuseumDowning StreetCambridge, CB2 3EQEngland
P. R. Crowther
Affiliation:
Leicestershire Museums, Art Galleries and Records Service96 New WalkLeicester, LE1 6TDEngland
A. J. Chapman
Affiliation:
Sedgwick MuseumDowning StreetCambridge, CB2 3EQEngland
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Summary

A reinterpretation is attempted of the 25 years of graptolite ultrastructural work based upon the present state of knowledge. It is emphasized that studies need to embrace many more species of graptolites, particularly in the dichograptid groups, and with different growth stages, before the gross evolution of ultrastructural elements can be satisfactorily appraised. The factual (morphological, ultrastructural) data are themselves reappraised, summarized, and very tentatively related to Bulman's anagenetic grades of graptolite development.

Type
Articles
Information
Geological Magazine , Volume 119 , Issue 4 , July 1982 , pp. 355 - 370
Copyright
Copyright © Cambridge University Press 1982

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