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The brachiopod Eoobolus from the Early Cambrian Mural Formation (Canadian Rocky Mountains)
Uppsala University, Disciplinary Domain of Science and Technology, Earth Sciences, Department of Earth Sciences.
2009 (English)In: Palaeontologische Zeitschrift, ISSN 0031-0220, Vol. 83, no 3, 407-418 p.Article in journal (Refereed) Published
Abstract [en]

The Early Cambrian brachiopod, Eoobolus, is one of the first representatives of the superfamily, Linguloidea, the defining characteristics of which include the classical morphology of oval shells and a pedicle that emerges from between the two valves. The material described here from the Mural Formation (Jasper National Park, Canadian Rocky Mountains) provides well-preserved muscle scars and larval shells that allow a discussion of the muscle system and the larval morphology of Eoobolus. The dorsal larval shell exhibits a morphology similar to other Cambrian linguloids, but also to paterinids, Mickwitzia muralensis, and some rhynchonelliforms. This suggests that there was a lesser degree of disparity among brachiopod larvae in the Cambrian than there is today. The muscle system of Eoobolus is similar to other linguloids, but differs from that of Recent lingulids and discinids by having one or two more pairs of oblique muscles. New data on the distribution of features characteristic of the family Eoobolidae question the validity of this family.

Place, publisher, year, edition, pages
2009. Vol. 83, no 3, 407-418 p.
Keyword [en]
Linguloidea, Muscle system, Larval shell, Linguliformea
National Category
Earth and Related Environmental Sciences
Identifiers
URN: urn:nbn:se:uu:diva-128276DOI: 10.1007/s12542-009-0026-4ISI: 000269535400004OAI: oai:DiVA.org:uu-128276DiVA: diva2:331049
Available from: 2010-07-21 Created: 2010-07-20 Last updated: 2010-07-21Bibliographically approved

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