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Revision of Histiodella labiosa Bauer, 2010, and its inferred phylogeny in the evolution of the Middle Ordovician conodont genus Histiodella Harris, 1962

Published online by Cambridge University Press:  02 May 2022

Yong Yi Zhen Open the ORCID record for Yong Yi Zhen [Opens in a new window] ,
Jeffrey A. Bauer  and
Stig M. Bergström
Yong Yi Zhen*
Affiliation:
Geological Survey of New South Wales, W.B. Clarke Geoscience Centre, 947-953 Londonderry Rd/Londonderry, NSW 2753, Australia
Jeffrey A. Bauer
Affiliation:
Shawnee State University, 940 Second Street Portsmouth, OH 45662, USA
Stig M. Bergström
Affiliation:
School of Earth Sciences, The Ohio State University, 125 S. Oval Mall, Columbus, Oh 43210, USA
*
*Corresponding author.
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Abstract

Based on abundant topotype specimens from the Oil Creek Formation at the type locality in southern Oklahoma, Histiodella labiosa is described and revised. The morphological variation of the Pa, Pb, and M elements of this previously little-known species is also systematically documented and illustrated. The revised species definition, with formal designation of a lectotype and a new diagnosis supported by morphological comparison with its ancestral and descendent species, has enhanced its value for correlation of the lower Darriwilian. The inferred phylogeny of Histiodella that resulted from this study is based on both cladistic and morphological analyses. It supports the monophyletic grouping of Histiodella species and their evolutionary relationships. This has wide biostratigraphic implications because many Histiodella species are valuable for detailed global correlation of upper Dapingian to middle Darriwilian strata.

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Journal of Paleontology , Volume 96 , Issue 5 , September 2022 , pp. 1149 - 1165
Copyright
Copyright © The Author(s), 2022. Published by Cambridge University Press on behalf of The Paleontological Society

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