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    A morphological revision of Keraterpeton, the earliest horned nectridean from the Pennsylvanian of England and Ireland.

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    Angela Milner Keraterpeton.pdf
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    Authors
    Milner, Angela cc
    Issue date
    2019-03
    Submitted date
    2020-02-07
    Subject Terms
    anatomy
    diplocaulid
    evolution
    functional morphology
    systematics
    
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    Abstract
    The aquatic diplocaulid nectridean Keraterpeton galvani is the commonest taxon represented in the Jarrow Coal assemblage from Kilkenny, Ireland. The Jarrow locality has yielded the earliest known Carboniferous coal-swamp fauna in the fossil record and is, therefore, of importance in understanding the history and diversity of the diplocaulid clade. The morphology of Keraterpeton is described in detail with emphasis on newly observed anatomical features. A reconstruction of the palate includes the presence of interpterygoid vacuities and new morphological details of the pterygoid, parasphenoid and basicranial region. The hyoid apparatus comprising an ossified basibranchial element has not been reported previously in nectrideans. The structure of the scapulocoracoid and primitive nature of the humerus is described and the presence of a five-digit manus confirmed. Previously unrecognised accessory dermal ossifications are present in the pectoral girdle. Keraterpeton longtoni from the Bolsovian in Staffordshire, England, is also described and newly figured. The primitive condition in diplocaulids is defined on the basis of the earliest occurrence at Jarrow and discussed in relation to functional morphology and mode of life. The evolution of the diplocaulid clade is assessed in relation to the revised diagnoses that define the primitive condition in Keraterpeton.
    Journal
    Earth and Environmental Science Transactions of the Royal Society of Edinburgh
    URI
    http://hdl.handle.net/10141/622627
    DOI
    https://doi.org/10.1017/S1755691018000579
    Type
    Journal Article
    Item Description
    © The Royal Society of Edinburgh 2019 The attached document is the author(’s’) final accepted/submitted version of the journal article. You are advised to consult the publisher’s version if you wish to cite from it.
    ae974a485f413a2113503eed53cd6c53
    https://doi.org/10.1017/S1755691018000579
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    Earth sciences

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