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Publication - Dr Jakob Vinther

    The mouth apparatus of the Cambrian gilled lobopodian Pambdelurion whittingtoni

    Citation

    Vinther, J, Porras, L, Young, F, Budd, GE & Edgecombe, GD, 2016, ‘The mouth apparatus of the Cambrian gilled lobopodian Pambdelurion whittingtoni’. Palaeontology, vol 59., pp. 841-849

    Abstract

    Omnidens is a large feeding apparatus composed of circlets of
    teeth, first documented from the early Cambrian of China. Originally
    interpreted as the oral cone of a radiodontan, it was later
    reinterpreted as the introvert of a priapulan. In both cases the Omnidens mouthparts underpinned estimates of gigantic (c.
    2 m) body size. Recent evidence has been used to suggest that
    pharyngeal teeth and radially-arranged oral plates in the stem-group
    onychophoran Hallucigenia and the lower stem-group euarthropod Jianshanopodia
    are homologous to structures of the introvert in priapulans and other
    scalidophorans, and are thus primitive characters for moulting animals
    (Ecdysozoa) as a whole. Here we show that the early Cambrian gilled
    lobopodian Pambdelurion whittingtoni from Sirius Passet, Greenland, possesses a mouth apparatus identical to Omnidens,
    being composed of the same three zones with detailed similarities of
    sclerites in each zone. An oral cone with rings of pharyngeal teeth,
    radial plates and outer scalid-like plates are ecdysozoan characters
    retained in the euarthropod stem group. Omnidens from China probably belongs to an unrecognized Pambdelurion-like animal rather than being part of a giant priapulan.

    Full details in the University publications repository