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Biostratigraphical and palaeogeographical implications of Early Cambrian hyoliths from the North China Platform
Swedish Museum of Natural History, Department of Paleobiology.ORCID iD: 0000-0001-7366-7680
2019 (English)In: Alcheringa, ISSN 0311-5518, E-ISSN 1752-0754, Vol. 43, p. 351-380Article in journal (Refereed) Published
Abstract [en]

A succession of diverse hyolith assemblages comprising 10 genera and 14 species are reported from the lower Cambrian Shangwan and Sanjianfang sections of the Xinji Formation, and Xiaomeiyao section of the Houjiashan Formation, which crop out along the southern margin of the North China Platform. Most of the specimens are represented by both conchs and opercula. The identified orthothecids include Conotheca australiensis, Cupitheca holocyclata, C. costellata, Neogloborilus applanatus, N. spinatus, Tegminites hymenodes, Triplicatella disdoma, T. xinjia sp. nov. and Paratriplicatella shangwanensis gen. et sp. nov. The hyolithids comprise Protomicrocornus triplicensis gen. et sp. nov., Microcornus eximius, M. petilus, Parkula bounites and Parakorilithes mammillatus. Some anomalous taxa possess characteristics of both Hyolithida and Orthothecida, such as C. australiensis, Neogloborilus and P. triplicensis. Protomicrocornus may constitute a sister group of other hyolithids. The teeth of Parkula bounites and clavicles of Parakorilithes mammillatus are documented for the first time. The hyolith assemblages from North China are probably coeval, and can be correlated with the Cambrian upper Stage 3–lower Stage 4. Many taxa are also globally distributed and have significant potential for biostratigraphical correlations. In accordance, the hyoliths from North China reveal closest compositional similarities to faunas from eastern Gondwana, and especially South Australia. However, some taxa are shared with Laurentian assemblages suggesting cosmopolitanism, and possibly planktonic larval dispersal.

Place, publisher, year, edition, pages
2019. Vol. 43, p. 351-380
Keywords [en]
hyolith, taxonomy, biostratigraphy, palaeogeography, North China Platform, Cambrian Stage 3–4
National Category
Geology
Research subject
Diversity of life
Identifiers
URN: urn:nbn:se:nrm:diva-3371DOI: 10.1080/03115518.2019.1577492OAI: oai:DiVA.org:nrm-3371DiVA, id: diva2:1370053
Funder
Swedish Research Council, VR2016-04610Available from: 2019-11-13 Created: 2019-11-13 Last updated: 2019-11-13Bibliographically approved

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Publisher's full texthttps://www.tandfonline.com/doi/full/10.1080/03115518.2019.1577492

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