| The oral cone of Anomalocaris is not a classic ''peytoia'' | |
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MedLine Citation:
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PMID: 22476406 Owner: NLM Status: Publisher |
Abstract/OtherAbstract:
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The Cambro-Ordovician anomalocaridids are large ecdysozoans commonly regarded as ancestors of the arthropods and apex predators. Predation is indicated partly by the presence of an unusual "peytoia"-type oral cone, which is a tetraradial outer ring of 32 plates, four of which are enlarged and in perpendicular arrangement. This oral cone morphology was considered a highly consistent and defining characteristic of well-known Burgess Shale taxa. It is here shown that Anomalocaris has a different oral cone, with only three large plates and a variable number of smaller and medium plates. Its functional morphology suggests that suction, rather than biting, was used for food ingestion, and that anomalocaridids in general employed a range of different scavenging and predatory feeding strategies. Removing anomalocaridids from the position of highly specialized trilobite predators forces a reconsideration of the ecological structure of the earliest marine animal communities in the Cambrian. |
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Authors:
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Allison C Daley; Jan Bergström |
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Publication Detail:
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Type: JOURNAL ARTICLE Date: 2012-4-5 |
Journal Detail:
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Title: Die Naturwissenschaften Volume: - ISSN: 1432-1904 ISO Abbreviation: - Publication Date: 2012 Apr |
Date Detail:
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Created Date: 2012-4-5 Completed Date: - Revised Date: - |
Medline Journal Info:
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Nlm Unique ID: 0400767 Medline TA: Naturwissenschaften Country: - |
Other Details:
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Languages: ENG Pagination: - Citation Subset: - |
Affiliation:
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Department of Palaeontology, Natural History Museum, Cromwell Road, London, SW7 5BD, UK, A.Daley@nhm.ac.uk. |
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