Ben Creisler
Some recent items:
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New abstracts book:
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Robert âBobâ Lynn Carroll (1938 - 2020)
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An oval recycling flume with live-beds (moveable) of medium and very coarse grained sands were used to explore the process of bone burial as a precursor to fossilization. Two-dimentional computation fluid dynamics was used to visualize and interpret the flow turbulence around bones. Results show that a water mass approaching and passing a static bone (obstruction) is subjected to flow modification by flow separation, flow constriction, and flow acceleration producing complex flow patterns (turbulence). These complex patterns include an upstream high-pressure zone, down flows, and vortices (with flow reversal near the bed) causing bed shear stress that produce bed erosion. Downstream of the bone, the water mass undergoes flow deceleration, water recirculation (turbulence eddies), flow reattachment, low-pressure zone (drag), and sediment deposition. Scour plays a crucial role by undercutting bone on the upstream side and may cause the bone to settle into the bed by rotation or sliding. Scour geometry is determined by bone size and shape, approaching flow velocity and angle to flow, flow depth, bed topography, and bed friction. Drag on the downstream side of the bone causes scoured sediment deposition, but burial by migrating bed forms is the most important method of large bone burial. Bone may be repeatedly buried and exposed with renewed scour. However, each episode of scour may lower the bone deeper into the bed so that it essentially buries itself. No difference in these effects were noted between experiments using fine or coarse grain sizes. This experimental work is then used to interpret the possible history of bone burial in the Upper Jurassic Morrison Formation on the bone wall inside the Quarry Exhibit Hall at Dinosaur National Monument, Utah.
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de Queiroz, K., Cantino, P. D. (2020)Â
International Code of Phylogenetic Nomenclature (PhyloCode).
Boca Raton: CRC Press: 189 pp.
doi:
https://doi.org/10.1201/9780429446320https://www.taylorfrancis.com/books/9780429446320The PhyloCode is a set of principles, rules, and recommendations governing phylogenetic nomenclature, a system for naming taxa by explicit reference to phylogeny. In contrast, the current botanical, zoological, and bacteriological codes define taxa by reference to taxonomic ranks (e.g., family, genus) and types. This code will govern the names of clades; species names will still be governed by traditional codes. The PhyloCode is designed so that it can be used concurrently with the rank-based codes. It is not meant to replace existing names but to provide an alternative system for governing the application of both existing and newly proposed names.
Key Features
Provides clear regulations for naming clades
Based on expressly phylogenetic principles
Complements existing codes of nomenclature
Eliminates the reliance on taxonomic ranks in favor of phylogenetic relationships
TABLE OF CONTENTS
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de Queiroz, K. (Ed.), Cantino, P. D. (Ed.), Gauthier, J. A. (Ed.). (2020)Â
Phylonyms.
Boca Raton: CRC Press: 1352 pp.
doi:
https://doi.org/10.1201/9780429446276https://www.taylorfrancis.com/books/9780429446276 Phylonyms is an implementation of PhyloCode, which is a set of principles, rules, and recommendations governing phylogenetic nomenclature. Nearly 300 clades - lineages of organisms - are defined by reference to hypotheses of phylogenetic history rather than by taxonomic ranks and types. This volume will document the Real World uses of PhyloCode and will govern and apply to the names of clades, while species names will still be governed by traditional codes.
Key Features
Provides clear regulations for implementing new guidelines for naming lineages of organisms
incorporates expressly evolutionary and phylogenetic principles
Works with existing codes of nomenclature
Eliminates the reliance on rank-based classification in favor of phylogenetic relationships
TABLE OF CONTENTS
[Note that some major clades (Dinosauria, Saurischia, Sauropodomorpha, Theropoda) now have new definitions.]Â
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