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Latest Ordovician to earliest Silurian graptolites of northwest Peninsular Malaysia

Published online by Cambridge University Press:  19 January 2023

Muhammad Aqqid Saparin Open the ORCID record for Muhammad Aqqid Saparin [Opens in a new window]  and
Mohd Suhaili Ismail
Muhammad Aqqid Saparin*
Affiliation:
Geosciences Department, Universiti Teknologi PETRONAS, 32610 Seri Iskandar, Perak Darul Ridzuan, Malaysia ,
Mohd Suhaili Ismail
Affiliation:
Geosciences Department, Universiti Teknologi PETRONAS, 32610 Seri Iskandar, Perak Darul Ridzuan, Malaysia ,
*
*Corresponding author.
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Abstract

Graptolites from the latest Ordovician to the earliest Silurian rocks of northwest Peninsular Malaysia are described and reviewed. The fossils were collected previously by C. R. Jones and presently by the authors inside the black mudstones from the basal section of Tanjung Dendang Formation in Pulau Langgun, Langkawi, which comprises assemblages from the Hirnantian Metabolograptus extraordinarius Biozone to the Rhuddanian Akidograptus ascensus–Parakidograptus acuminatus Biozone. The latest Ordovician strata also include a Hirnantia fauna bed between the Metabolograptus extraordinarius and Metabolograptus persculptus biozones, in which shelly fossils such as Mucronaspis sp. could be recovered. A revised graptolite biozonation is proposed for the latest Ordovician to the earliest Silurian succession of northwest Peninsular Malaysia. This interval is significant for understanding the extent of mass extinction events happening right at the end of the Ordovician period and subsequent faunal change in the region.

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Journal of Paleontology , Volume 97 , Issue 2 , March 2023 , pp. 395 - 420
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Copyright © The Author(s), 2023. Published by Cambridge University Press on behalf of The Paleontological Society

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