Hirnantia Fauna from the Condroz Inlier, Belgium: another case of a relict Ordovician shelly fauna in the Silurian?

Result code in IS VaVaI

<a href="https://www.isvavai.cz/riv?ss=detail&h=RIV%2F67985831%3A_____%2F21%3A00558902" target="_blank" >RIV/67985831:_____/21:00558902 - isvavai.cz</a>

Result on the web

<a href="https://www.cambridge.org/core/journals/journal-of-paleontology/article/abs/hirnantia-fauna-from-the-condroz-inlier-belgium-another-case-of-a-relict-ordovician-shelly-fauna-in-the-silurian/44E4B59DCA755AD910CC38CCAFE49C12" target="_blank" >https://www.cambridge.org/core/journals/journal-of-paleontology/article/abs/hirnantia-fauna-from-the-condroz-inlier-belgium-another-case-of-a-relict-ordovician-shelly-fauna-in-the-silurian/44E4B59DCA755AD910CC38CCAFE49C12</a>

DOI - Digital Object Identifier

<a href="http://dx.doi.org/10.1017/jpa.2021.74" target="_blank" >10.1017/jpa.2021.74</a>

Result language

angličtina

Original language name

Hirnantia Fauna from the Condroz Inlier, Belgium: another case of a relict Ordovician shelly fauna in the Silurian?

Original language description

The end-Ordovician mass extinction, linked to a major glaciation, led to deep changes in Hirnantian–Rhuddanian biotas. The Hirnantia Fauna, the first of two Hirnantian survival brachiopod-dominated communities, characterizes the lower–mid Hirnantian deposits globally, and its distribution is essential to understand how the extinction took place. In this paper, we describe, illustrate, and discuss the first macrofossiliferous Hirnantia Fauna assemblage from Belgium, occurring in the Tihange Member of the Fosses Formation at Tihange (Huy), within the Central Condroz Inlier. Six fossiliferous beds have yielded a low-diversity, brachiopod-dominated association. In addition to the brachiopods (Eostropheodonta hirnantensis, Plectothyrella crassicosta, Hirnantia sp., and Trucizetina? sp.), one trilobite (Mucronaspis sp.), four pelmatozoans (Xenocrinus sp., Cyclocharax [col.] paucicrenulatus, Conspectocrinus [col.] celticus, and Pentagonocyclicus [col.] sp.), three graptolites (Cystograptus ancestralis, Normalograptus normalis, and ?Metabolograptus sp.), together with indeterminate machaeridians and bryozoans were identified. The graptolite assemblage, from the Akidograptus ascensus-Parakidograptus acuminatus Biozone, indicates an early Rhuddanian (Silurian) age, and thus, an unexpectedly late occurrence of a typical Hirnantia Fauna. This Belgian association may represent an additional example of relict Hirnantia Fauna in the Silurian, sharing characteristics with the only other known from Rhuddanian rocks at Yewdale Beck (Lake District, England), although reworking has not been completely ruled out. The survival of these Hirnantian taxa into the Silurian might be linked to delayed post-glacial effects of rising temperature and sea-level, which may have favored the establishment of refugia in these two particular regions that were paleogeographically close during the Late Ordovician–early Silurian.

Czech name

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Czech description

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Type

J_imp - Article in a specialist periodical, which is included in the Web of Science database

CEP classification

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OECD FORD branch

10506 - Paleontology

Project

—

Continuities

I - Institucionalni podpora na dlouhodoby koncepcni rozvoj vyzkumne organizace

Publication year

2021

Confidentiality

S - Úplné a pravdivé údaje o projektu nepodléhají ochraně podle zvláštních právních předpisů

Name of the periodical

Journal of Paleontology

ISSN

0022-3360

e-ISSN

1937-2337

Volume of the periodical

95

Issue of the periodical within the volume

6

Country of publishing house

US - UNITED STATES

Number of pages

27

Pages from-to

1189-1215

UT code for WoS article

000721333200007

EID of the result in the Scopus database

2-s2.0-85112835379