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The Fossils of the Burgess Shale
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Disparity as an evolutionary index; a comparison of Cambrian and Recent arthropods
Disparity is a measure of the range or significance of morphology in a given sample of organisms, as opposed to diversity, which is expressed in terms of the number (and sometimes ranking) of taxa.Expand
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Ordovician faunas of Burgess Shale type
The renowned soft-bodied faunas of the Cambrian period, which include the Burgess Shale, disappear from the fossil record in the late Middle Cambrian, after which the Palaeozoic fauna dominates. TheExpand
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The conodont animal
A unique specimen of a small, elongate, soft-bodied animal from the Lower Carboniferous of the Edinburgh district, Scotland, is described. The head expands anteriorly into two lobate structuresExpand
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The Cambrian evolutionary ‘explosion’: decoupling cladogenesis from morphological disparity
The origin and differentiation of major clades is often assumed to have occurred in tandem with the ‘explosion’ of fossil evidence of diverse morphologies (‘disparity’) at the base of the Cambrian.Expand
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The role of the calcium carbonate-calcium phosphate switch in the mineralization of soft-bodied fossils
Authigenic minerals play an important role in the preservation of most soft-bodied fossils. The greatest detail is preserved in apatite (calcium phosphate) but its precipitation is usually inhibitedExpand
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The Fezouata fossils of Morocco; an extraordinary record of marine life in the Early Ordovician
The discovery of the Fezouata biota in the latest Tremadocian of southeastern Morocco has significantly changed our understanding of the early Phanerozoic radiation. The shelly fossil record shows aExpand
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A Silurian armoured aplacophoran and implications for molluscan phylogeny
The Mollusca is one of the most diverse, important and well-studied invertebrate phyla; however, relationships among major molluscan taxa have long been a subject of controversy. In particular, theExpand
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Middle Cambrian Arthropods from Utah
Abstract The Middle Cambrian Spence Shale Member (Langston Formation) and Wheeler and Marjum Formations of Utah are known to contain a diverse soft-bodied fauna, but important new paleontologicalExpand
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A giant Ordovician anomalocaridid
Anomalocaridids, giant lightly sclerotized invertebrate predators, occur in a number of exceptionally preserved early and middle Cambrian (542–501 million years ago) biotas and have come to symbolizeExpand
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