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11 April 2023 Latest Ordovician to earliest Silurian graptolites of northwest Peninsular Malaysia
Muhammad Aqqid Saparin, Mohd Suhaili Ismail
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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 ascensusParakidograptus 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.

Muhammad Aqqid Saparin and Mohd Suhaili Ismail "Latest Ordovician to earliest Silurian graptolites of northwest Peninsular Malaysia," Journal of Paleontology 97(2), 395-420, (11 April 2023). https://doi.org/10.1017/jpa.2022.94
Accepted: 12 September 2022; Published: 11 April 2023
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