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A nearshore Hirnantian brachiopod fauna from South China and its ecological significance

Huang, Bing; Rong, Jiayu; Harper, David A.T.; Zhou, Hanghang

A nearshore Hirnantian brachiopod fauna from South China and its ecological significance Thumbnail


Authors

Bing Huang

Jiayu Rong

Hanghang Zhou



Abstract

The brachiopods collected from the Kuanyinchiao Beds (Hirnantian, uppermost Ordovician) in Meitan and Zunyi counties, northern Guizhou, include 13 species and one undetermined taxon, dominated by Hirnantia sagittifera (M'Coy, 1851) (which accounts for over one-third of the specimens), together with common Eostropheodonta hirnantensis (M'Coy, 1851). They are assigned to the Hirnantia–Eostropheodonta Community, which probably inhabited a shallow-water, nearshore Benthic Assemblage (BA) 2 to upper BA 3 environment. Population analysis shows that the community was well adapted to this environment after the first phase of the end-Ordovician mass extinction. Representative specimens of all the species are illustrated, and a new species, Minutomena missa, is described herein. The variation in Hirnantia sagittifera was noted in many of previous studies but was not statistically evidenced. Here we have measured representative specimens of that famous species from the major paleoplates and terranes in the world, along with other species assigned to the genus from South China. Having used principal component analysis (PCA), significant variations in the species are documented statistically and revised, and three nominal species, one subspecies, and two morphotypes are now reassigned to Hirnantia sagittifera sensu stricto.

Journal Article Type Article
Acceptance Date Nov 5, 2019
Online Publication Date Nov 26, 2019
Publication Date Mar 31, 2020
Deposit Date Dec 14, 2019
Publicly Available Date May 26, 2020
Journal Journal of Paleontology
Print ISSN 0022-3360
Electronic ISSN 1937-2337
Publisher Cambridge University Press
Peer Reviewed Peer Reviewed
Volume 94
Issue 2
Pages 239-254
DOI https://doi.org/10.1017/jpa.2019.90
Public URL https://durham-repository.worktribe.com/output/1280683

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