M
Mark A. Purnell
Researcher at University of Leicester
Publications - 87
Citations - 3188
Mark A. Purnell is an academic researcher from University of Leicester. The author has contributed to research in topics: Conodont & Vertebrate. The author has an hindex of 32, co-authored 85 publications receiving 2794 citations. Previous affiliations of Mark A. Purnell include University of Toronto & Stony Brook University.
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Genome duplication, extinction and vertebrate evolution
TL;DR: It is argued here that, when fossils are taken into account, bursts of character acquisition disappear and gen(om)e duplication in vertebrate phylogeny can no longer be correlated with the origin of body plans.
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Orientation and anatomical notation in conodonts
TL;DR: This work introduces new terms for orientation in conodonts and their elements, and a modified scheme of anatomical notation, which can be applied rigorously to all taxa that are known from natural assemblages or where an hypothesis of topological homology can be inferred from secondary morphological criteria.
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Non-random decay of chordate characters causes bias in fossil interpretation
TL;DR: It is shown, from experimental decay of amphioxus and ammocoetes, that loss of chordate characters during decay is non-random: the more phylogenetically informative are the most labile, whereas plesiomorphic characters are decay resistant.
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Dietary specializations and diversity in feeding ecology of the earliest stem mammals
Pamela G. Gill,Mark A. Purnell,Nick Crumpton,Kate Robson Brown,Neil J. Gostling,Marco Stampanoni,Marco Stampanoni,Emily J. Rayfield +7 more
TL;DR: An integrated analysis using synchrotron X-ray tomography and analyses of biomechanics, finite element models and tooth microwear textures reveals previously hidden trophic specialization at the base of the mammalian radiation; hence even the earliest mammaliaforms were beginning to diversify—morphologically, functionally and ecologically.
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Microwear on conodont elements and macrophagy in the first vertebrates
TL;DR: In this article, microscopic wear patterns on conodont elements were found to indicate that they functioned as teeth, and the presence of teeth and evidence of macrophagy in such primitive and early vertebrates support hypotheses that the first vertebrates were predators.