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Mullins, 2000

Mullins, G. L. 2000. A chitinozoan morphological lineage and its importance in lower Silurian stratigraphy. Palaeontology 43 (2), 359-373. | DOI | DETAILS

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ID8672
ReferenceMullins, 2000
AuthorMullins, G. L.
Year2000
TitleA chitinozoan morphological lineage and its importance in lower Silurian stratigraphy
JournalPalaeontology
Volume43
Number2
pgs.359-373
Source typearticle in journal
LanguageEnglish
DOI10.1111/1475-4983.00131
URLhttps://onlinelibrary.wiley.com/doi/epdf/10.1111/1475-4983.00131
Abstract

Margachitina margaritana is a distinctive, chainā€forming chitinozoan taxon of the uppermost Telychian Stage (Llandovery Series) to lower Homerian Stage (Wenlock Series). M. margaritana is shown to be the end member of a morphological lineage that developed from Calpichitina densa via the intermediate Margachitina banwyensis sp. nov. A local M. banwyensis Biozone, which correlates with the upper lapworthi graptolite Biozone, is proposed for the Banwy River section. The morphological lineage described provides a tool for the enhanced subdivision of the uppermost Llandovery Series, which may prove global in extent. This research suggests also that the base of the Wenlock Series may correlate with a level below the centrifugus graptolite Biozone and it also brings into question the systematic status of Calpichitina and Margachitina, although both genera are retained herein.


New taxa described

RankTaxon nameBelongs to
SpeciesMargachitina banwyensis Mullins, 2000Margachitina