Palaeobiogeographic dynamics of brachiopod faunas during the Frasnian-Famennian biotic crisis in South China

2018 ◽  
Vol 99 (1) ◽  
pp. 91-99 ◽  
Author(s):  
Li Qiao ◽  
Wenkun Qie
Keyword(s):  
2013 ◽  
Vol 87 (2) ◽  
pp. 232-242 ◽  
Author(s):  
Bing Huang ◽  
Jia-Yu Rong ◽  
David A. T. Harper

The brachiopod genus Dicoelosia is generally considered a typical deep-water taxon. New data suggest that some species of the genus may have invaded relatively shallow-water habitats during its geological history. However, there is scant evidence for its invasion of shallow-water environments after the terminal Ordovician mass extinction. Dicoelosia occurs in the shallower-water benthic shelly assemblages of the lower Niuchang Formation (upper Rhuddanian, Llandovery) of Meitan County, northern Guizhou Province, South China. Evidence of a move to shallow water includes its morphology and population structure, regional paleogeography, sedimentology, together with the abundance and diversity of its shallow-water associates. Following the biotic crisis, deep-water environments were barely habitable, and may have driven Dicoelosia into shallower-water niches. The taxon endured the less suitable shallow-water environments until the deep-water benthic zones ameliorated after the recovery, implying a shallow-water refugium existed after the biotic crisis. A new species Dicoelosia cathaysiensis is erected herein. There is only one record of this genus in South China and this unique occurrence may reflect the distinctive paleobiogeography and environments of this region.


Geobios ◽  
2011 ◽  
Vol 44 (1) ◽  
pp. 71-85 ◽  
Author(s):  
Michael Hautmann ◽  
Hugo Bucher ◽  
Thomas Brühwiler ◽  
Nicolas Goudemand ◽  
Andrzej Kaim ◽  
...  
Keyword(s):  

1988 ◽  
Vol 62 (03) ◽  
pp. 411-419 ◽  
Author(s):  
Colin W. Stearn

Stromatoporoids are the principal framebuilding organisms in the patch reef that is part of the reservoir of the Normandville field. The reef is 10 m thick and 1.5 km2in area and demonstrates that stromatoporoids retained their ability to build reefal edifices into Famennian time despite the biotic crisis at the close of Frasnian time. The fauna is dominated by labechiids but includes three non-labechiid species. The most abundant species isStylostroma sinense(Dong) butLabechia palliseriStearn is also common. Both these species are highly variable and are described in terms of multiple phases that occur in a single skeleton. The other species described areClathrostromacf.C. jukkenseYavorsky,Gerronostromasp. (a columnar species), andStromatoporasp. The fauna belongs in Famennian/Strunian assemblage 2 as defined by Stearn et al. (1988).


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