An abnormal pygidium of the trilobite Br
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A. W. Owen; J. W. Tilsley
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Article
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1996
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John Wiley and Sons
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English
β 292 KB
A pygidium of Brackyrneropus orncirus Woodward shows an abnormally developed left side affecting the whole of the pleural area and its rib development. Such an extensive abnormality, which does not extend beyond the axial furrow and shows none of the signs of resulting from injury, is currently uniq