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Paterimitra pyramidalis from South Australia: scleritome, shell structure and evolution of a Lower Cambrian Ssten group brachiopod
Uppsala Universitet.
Swedish Museum of Natural History, Department of Paleobiology.ORCID iD: 0000-0001-7366-7680
Macquarie University, Sydney, Australia.
University of Glasgow.
Show others and affiliations
2014 (English)In: Palaeontology, ISSN 0031-0239, E-ISSN 1475-4983, Vol. 57, no 2, 417-446 p.Article in journal (Refereed) Published
Abstract [en]

The tommotiid Paterimitra pyramidalis Laurie, 1986, is redescribed based on well-preserved material from the lower Cambrian Wilkawillina, Wirrapowie and Ajax limestones of the Flinders Ranges, South Australia. The material shows that the scleritome of Paterimitra pyramidalis includes three sclerite morphotypes (S1, S2 and L). Detailed shell microstructure studies show striking similarities with both the paterinid brachiopod Askepasma toddense and the tommotiid Eccentrotheca helenia, which strengthens the suggested evolutionary link between tommotiids and brachiopods. Based on the partly articulated specimens and similarities in shell microstructure and sclerite morphology with Eccentrotheca, Paterimitra pyramidalis is reconstructed as a tube-dwelling, epifaunal, sessile, filter-feeder with an organic pedicle-like attachment structure. The proposed reconstruction of the scleritome comprises a basal unit composed of one S1 and one S2 sclerite, as well as an unresolved number of L sclerites lining a coniform tubular structure.

Place, publisher, year, edition, pages
2014. Vol. 57, no 2, 417-446 p.
Keyword [en]
Tommotiida, Brachiopoda, Paterimitra, scleritome structure, lower Cambrian, South Australia
National Category
Geology
Research subject
Ecosystems and species history
Identifiers
URN: urn:nbn:se:nrm:diva-868DOI: 10.1111/pala.12072OAI: oai:DiVA.org:nrm-868DiVA: diva2:779034
Projects
Origin and early evolution of major animal clades in the Cambrian Period
Funder
Swedish Research Council, 2009-4395,Swedish Research Council, 2012-1658
Available from: 2015-01-12 Created: 2014-11-20 Last updated: 2015-02-05Bibliographically approved

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Publisher's full texthttp://onlinelibrary.wiley.com/doi/10.1111/pala.12072/full

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