Search Results - "Purnell, Mark A."

Pterosaur dietary hypotheses: a review of ideas and approaches by Bestwick, Jordan, Unwin, David M., Butler, Richard J., Henderson, Donald M., Purnell, Mark A.

“…ABSTRACT Pterosaurs are an extinct group of Mesozoic flying reptiles, whose fossil record extends from approximately 210 to 66 million years ago. They were…”
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Dietary diversity and evolution of the earliest flying vertebrates revealed by dental microwear texture analysis by Bestwick, Jordan, Unwin, David M., Butler, Richard J., Purnell, Mark A.

“…Pterosaurs, the first vertebrates to evolve active flight, lived between 210 and 66 million years ago. They were important components of Mesozoic ecosystems,…”
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Dietary differences in archosaur and lepidosaur reptiles revealed by dental microwear textural analysis by Bestwick, Jordan, Unwin, David M., Purnell, Mark A.

“…Reptiles are key components of modern ecosystems, yet for many species detailed characterisations of their diets are lacking. Data currently used in dietary…”
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Dietary specializations and diversity in feeding ecology of the earliest stem mammals by Gill, Pamela G., Purnell, Mark A., Crumpton, Nick, Brown, Kate Robson, Gostling, Neil J., Stampanoni, M., Rayfield, Emily J.

“…Differences in function and dietary ecology between Morganucodon and Kuehneotherium show that lineage splitting during the earliest stages of mammalian…”
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Dental microwear texture analysis as a tool for dietary discrimination in elasmobranchs by McLennan, Laura J., Purnell, Mark A.

“…As abundant and widespread predators, elasmobranchs play influential roles in food-web dynamics of marine communities. Clearly, these trophic interactions have…”
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Non-random decay of chordate characters causes bias in fossil interpretation by Purnell, Mark A, Sansom, Robert S, Gabbott, Sarah E

“…Exceptional preservation of soft-bodied Cambrian chordates provides our only direct information on the origin of vertebrates. Fossil chordates from this…”
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Accuracy and Precision of Silicon Based Impression Media for Quantitative Areal Texture Analysis by Goodall, Robert H., Darras, Laurent P., Purnell, Mark A.

“…Areal surface texture analysis is becoming widespread across a diverse range of applications, from engineering to ecology. In many studies silicon based…”
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Pigmented anatomy in Carboniferous cyclostomes and the evolution of the vertebrate eye by Gabbott, Sarah E., Donoghue, Philip C. J., Sansom, Robert S., Vinther, Jakob, Dolocan, Andrei, Purnell, Mark A.

“…The success of vertebrates is linked to the evolution of a camera-style eye and sophisticated visual system. In the absence of useful data from fossils,…”
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Three-dimensional dental microwear in type-Maastrichtian mosasaur teeth (Reptilia, Squamata) by Holwerda, Femke M., Bestwick, Jordan, Purnell, Mark A., Jagt, John W. M., Schulp, Anne S.

“…Mosasaurs (Squamata, Mosasauridae) were large aquatic reptiles from the Late Cretaceous that filled a range of ecological niches within marine ecosystems. The…”
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Decay of vertebrate characters in hagfish and lamprey (Cyclostomata) and the implications for the vertebrate fossil record by Sansom, Robert S., Gabbott, Sarah E., Purnell, Mark A.

“…The timing and sequence of events underlying the origin and early evolution of vertebrates remains poorly understood. The palaeontological evidence should shed…”
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Distinguishing heat from light in debate over controversial fossils by Donoghue, Philip C.J, Purnell, Mark A

“…Fossil organisms offer our only direct insight into how the distinctive body plans of extant organisms were assembled. However, realizing the potential…”
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Dietary constraints of phytosaurian reptiles revealed by dental microwear textural analysis by Bestwick, Jordan, Jones, Andrew S., Purnell, Mark A., Butler, Richard J., Porro, Laura

“…Phytosaurs are a group of large, semi‐aquatic archosaurian reptiles from the Middle–Late Triassic. They have often been interpreted as carnivorous or…”
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Experimental analysis of soft‐tissue fossilization: opening the black box by Purnell, Mark A., Donoghue, Philip J. C., Gabbott, Sarah E., McNamara, Maria E., Murdock, Duncan J. E., Sansom, Robert S., Smith, Andrew

“…Taphonomic experiments provide important insights into fossils that preserve the remains of decay‐prone soft tissues, tissues that are usually degraded and…”
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The impact of taphonomic data on phylogenetic resolution: Helenodora inopinata (Carboniferous, Mazon Creek Lagerstätte) and the onychophoran stem lineage by Murdock, Duncan J E, Gabbott, Sarah E, Purnell, Mark A

“…The origin of the body plan of modern velvet worms (Onychophora) lies in the extinct lobopodians of the Palaeozoic. Helenodora inopinata, from the Mazon Creek…”
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Quantitative Analysis of Dental Microwear in Hadrosaurid Dinosaurs, and the Implications for Hypotheses of Jaw Mechanics and Feeding by Williams, Vincent S., Barrett, Paul M., Purnell, Mark A., Crane, Peter R.

“…Understanding the feeding mechanisms and diet of nonavian dinosaurs is fundamental to understanding the paleobiology of these taxa and their role in Mesozoic…”
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Atlas of vertebrate decay: a visual and taphonomic guide to fossil interpretation by Sansom, Robert S., Gabbott, Sarah E., Purnell, Mark A., Orr, Patrick

“…Like many other important evolutionary transitions, our knowledge of the origin of vertebrates is limited to windows of exceptional preservation of soft‐bodied…”
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Dental microwear texture analysis along reptile tooth rows: complex variation with non-dietary variables by Bestwick, Jordan, Unwin, David M, Henderson, Donald M, Purnell, Mark A

“…Dental microwear texture analysis (DMTA) is a powerful technique for reconstructing the diets of extant and extinct taxa. Few studies have investigated…”
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Taphonomy and affinity of an enigmatic Silurian vertebrate, Jamoytius kerwoodi White by SANSOM, ROBERT S., FREEDMAN, KIM, GABBOTT, SARAH E., ALDRIDGE, RICHARD J., PURNELL, MARK A.

“…:  The anatomy and affinities of Jamoytius kerwoodi White have long been controversial, because its complex taphonomy makes unequivocal interpretation…”
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The interrelationships of ‘complex’ conodonts (Vertebrata) by Donoghue, Philip C. J., Purnell, Mark A., Aldridge, Richard J., Zhang, Shunxin

“…Little attention has been paid to the suprageneric classification for conodonts and existing schemes have been formulated without attention to homology,…”
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Feeding in extinct jawless heterostracan fishes and testing scenarios of early vertebrate evolution by Purnell, Mark A.

“…wear, are covered internally by microscopic oral denticles, and that the mouth may have been less flexible than has been thought. These data, particularly the…”
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