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Journal of the Geological Society; August 1990; v. 147; no. 4; p. 717-723; DOI: 10.1144/gsjgs.147.4.0717
© 1990 Geological Society of London
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Article

Retiolite nomenclature and relationships

D. E. B. BATES

Institute of Earth Studies, University College of Wales, Aberystwyth, Dyfed SY23 3DB, UK

The retiolite graptolites can be divided into at least two major groups, each derived independently from diplograptid ancestors. The lacinia of some Ordovician forms, and the ancora and ancora sleeve (‘reticulum’) of Silurian retiolites, are both novel structures. Some other retiolite taxa lacking these structures are best grouped within diplograptid families. The nomenclature of retiolite structures is discussed.




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 Journal of PaleontologyHome page
UPPER HOMERIAN (UPPER WENLOCK, SILURIAN) GRAPTOLITES FROM ARCTIC CANADA
Journal of Paleontology, March 1, 2002; 76(2): 321 - 346.



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