Late Wenlock biostratigraphy and the Pristiograptus virbalensis group (Graptolithina) in Lithuania and the Holy Cross Mountains

Authors

  • Sigitas Radzevičius Department of Geology and Mineralogy, Vilnius University, M. K. Čiurlionio 21/27, Vilnius, LT 03101, Lithuania; Institute of Geology, University of Tartu, Vanemuise 46, EE-51014 Tartu, Estonia

Keywords:

Lithuania, Holy Cross Mts., Silurian, upper Wenlock, biostratigraphy, Graptolithina

Abstract

Graptolites from Lithuania and the Holy Cross Mountains comprise a succession of the lundgreni, parvus (except for the Holy Cross Mts.), nassa, praedeubeli, deubeli and ludensis biozones of the upper Wenlock, the parvus, praedeubeli and deubeli biozones being recognized for the first time in Lithuania, where a graptolite-free interval may also be distinguished. P. virbalensis Paskevičius, 1974 and the virbalensis group are not widely known, and are discussed here. Analysis of P. virbalensis shows this to be an independent taxon, closely related to P. auctus. There are three species -- P. virbalensis, P. jaegeri and P. auctus -- in the virbalensis group.

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Published

2010-03-27

Issue

Vol. 50 No. 3 (2006)

Section

Articles

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