• Publications
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Arthropod fossil data increase congruence of morphological and molecular phylogenies.
The relationships of major arthropod clades have long been contentious, but refinements in molecular phylogenetics underpin an emerging consensus. Nevertheless, molecular phylogenies have recoveredExpand
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Cambrian bivalved arthropod reveals origin of arthrodization
Extant arthropods are diverse and ubiquitous, forming a major constituent of most modern ecosystems. Evidence from early Palaeozoic Konservat Lagerstätten indicates that this has been the case sinceExpand
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Fossil calibrations for the arthropod Tree of Life
Abstract Fossil age data and molecular sequences are increasingly combined to establish a timescale for the Tree of Life. Arthropods, as the most species-rich and morphologically disparate animalExpand
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Silurian horseshoe crab illuminates the evolution of arthropod limbs
The basic arrangement of limbs in euarthropods consists of a uniramous head appendage followed by a series of biramous appendages. The body is divided into functional units or tagmata which areExpand
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The phylogeny of aglaspidid arthropods and the internal relationships within Artiopoda
The phylogenetic position of aglaspidids, a problematic group of Lower Palaeozoic arthropods of undetermined affinities, is re‐examined in the context of the major Cambrian and OrdovicianExpand
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Sanctacaris uncata: the oldest chelicerate (Arthropoda)
  • D. Legg
  • Biology, Medicine
  • Naturwissenschaften
  • 9 October 2014
The morphology of the arthropod Sanctacaris uncata, from the Middle Cambrian Burgess Shale of Canada, is reinterpreted based on a restudy of previously described material. Although originallyExpand
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The morphology and phylogenetic position of the Cambrian lobopodian Diania cactiformis
Cambrian lobopodians have attracted much attention in that they are considered to have close affinities with the origin of arthropods, and recent studies agree that they sample the stem-groups ofExpand
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Multi-Segmented Arthropods from the Middle Cambrian of British Columbia (Canada)
Abstract A new arthropod, Kootenichela deppi n. gen. n. sp., is described from the Stanley Glacier exposure of the middle Cambrian (Series 3, Stage 5) Stephen Formation in Kootenay National ParkExpand
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The Arthropod Fossil Record
With respect to animal life, we inhabit a planet dominated by arthropods. The Recent is not geologically anomalous in this respect—arthropods have been megadiverse for some 520 million years, sinceExpand
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Origins and early evolution of arthropods
Phylogenomics reconstructs an arthropod tree in which a monophyletic Arthropoda splits into Pycnogonida + Euchelicerata and Myriapoda + Pancrustacea. The same chelicerate–mandibulate groups areExpand
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