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Rhaphidograptus, a new Graptolite Genus.
Published online by Cambridge University Press: 01 May 2009
Extract
THE genus Dimorphograptus was founded by Lapworth (1876) for uni-biserial graptolites transitional between Diplograptus and Monograptus, evolution along what is now termed the “ Monograptid trend ” leading to the production of a uniserial proximal portion of the rhabdosome. Akidograptus has been proposed more recently by K. A. Davies for an early stage in the Dimorphograptus series, represented by the species Ak. acuminatus (Nicholson) and Ak. ascensus Davies.
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