Loading…
TAXONOMY AND PHYLOGENY OF STAUROGRAPTUS EMMONS FROM THE BASE OF THE ORDOVICIAN
: Taxonomic and biostratigraphic investigation of Staurograptus at small sampling intervals from the basal Ordovician sections at Green Point, western Newfoundland, Rivière Petite Blanche on the Gaspé Peninsula, Québec, and Wuning in north‐west Jiangxi, South China, reveal a complete morphological...
Saved in:
Published in: | Palaeontology 2005-09, Vol.48 (5), p.1007-1019 |
---|---|
Main Authors: | , , |
Format: | Article |
Language: | English |
Subjects: | |
Citations: | Items that cite this one |
Online Access: | Get full text |
Tags: |
Add Tag
No Tags, Be the first to tag this record!
|
Summary: | : Taxonomic and biostratigraphic investigation of Staurograptus at small sampling intervals from the basal Ordovician sections at Green Point, western Newfoundland, Rivière Petite Blanche on the Gaspé Peninsula, Québec, and Wuning in north‐west Jiangxi, South China, reveal a complete morphological series comprising three distinct staurograptid forms identified as three species: Staurograptus dichotomus Emmons, S. apertus Ruedemann and S. hyperboreus (Obut and Sobolevskaya). This new discovery suggests a complete phylogenetic lineage for Staurograptus, which is supposedly derived from an unknown dictyonemid form, and is expressed as phased distalward migration of the second‐order branches. Descriptions of these three species, reviews of their nomenclatorial histories, evaluations of their distinctive morphological criteria and discussions of their synonymous species or subspecies are presented. |
---|---|
ISSN: | 0031-0239 1475-4983 |
DOI: | 10.1111/j.1475-4983.2005.00497.x |