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The Morphology and Systematics of “Didymograptus” fasciculatus Nicholson, 1869

Published online by Cambridge University Press:  01 May 2009

David Skevington
David Skevington
Affiliation:
Department of Geology, University College London, Gower Street, W.C.1.
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Abstract

A new description of “Didymograptus” fasciculatus Nicholson, 1869, is given on the basis of specimens from the Skiddaw Slates (Zone of Didymograptus bifidus) some of which are preserved in relief. The uniramous rhabdosomal form is confirmed. The presence of prothecal folds indicates that the species belongs in the family Sinograptidae Mu, 1957, and adoption of the generic name Nicholsonograptus, proposed by Bouček and Přibyl (1951) with “ D. ” fasciculatus as the type species, is recommended. The possibility that Nicholsonograptus fasciculatus is an intraspecific variant of Holmograptus lentus (Törnquist, 1911) is discussed.

Type
Articles
Information
Geological Magazine , Volume 103 , Issue 6 , December 1966 , pp. 487 - 497
Copyright
Copyright © Cambridge University Press 1966

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References

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