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Echinoderm Morphological Disparity: Methods, Patterns, and Possibilities

2021-02-11 Science
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Release : 2021-02-11
Genre : Science
Kind : eBook
Book Rating : 041/5 ( reviews)

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Book Synopsis Echinoderm Morphological Disparity: Methods, Patterns, and Possibilities by : Bradley Deline

Download or read book Echinoderm Morphological Disparity: Methods, Patterns, and Possibilities written by Bradley Deline. This book was released on 2021-02-11. Available in PDF, EPUB and Kindle. Book excerpt: The quantification of morphology through time is a vital tool in elucidating macroevolutionary patterns. Studies of disparity require intense effort but can provide insights beyond those gained using other methodologies. Over the last several decades, studies of disparity have proliferated, often using echinoderms as a model organism. Echinoderms have been used to study the methodology of disparity analyses and potential biases as well as documenting the morphological patterns observed in clades through time. Combining morphological studies with phylogenetic analyses or other disparate data sets allows for the testing of detailed and far-reaching evolutionary hypotheses.

Phylogenetic Comparative Methods: A User's Guide for Paleontologists

2021-05-27 Science
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Release : 2021-05-27
Genre : Science
Kind : eBook
Book Rating : 355/5 ( reviews)

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Book Synopsis Phylogenetic Comparative Methods: A User's Guide for Paleontologists by : Laura C. Soul

Download or read book Phylogenetic Comparative Methods: A User's Guide for Paleontologists written by Laura C. Soul. This book was released on 2021-05-27. Available in PDF, EPUB and Kindle. Book excerpt: Recent advances in statistical approaches called phylogenetic comparative methods (PCMs) have provided paleontologists with a powerful set of analytical tools for investigating evolutionary tempo and mode in fossil lineages. However, attempts to integrate PCMs with fossil data often present workers with practical challenges or unfamiliar literature. This Element presents guides to the theory behind and the application of PCMs with fossil taxa. Based on an empirical dataset of Paleozoic crinoids, example analyses are presented to illustrate common applications of PCMs to fossil data, including investigating patterns of correlated trait evolution and macroevolutionary models of morphological change. The authors emphasize the importance of accounting for sources of uncertainty and discuss how to evaluate model fit and adequacy. Finally, the authors discuss several promising methods for modeling heterogeneous evolutionary dynamics with fossil phylogenies. Integrating phylogeny-based approaches with the fossil record provides a rigorous, quantitative perspective on understanding key patterns in the history of life.

Molecular Paleobiology of the Echinoderm Skeleton

2022-12-01 Science
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Release : 2022-12-01
Genre : Science
Kind : eBook
Book Rating : 190/5 ( reviews)

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Book Synopsis Molecular Paleobiology of the Echinoderm Skeleton by : Jeffrey R. Thompson

Download or read book Molecular Paleobiology of the Echinoderm Skeleton written by Jeffrey R. Thompson. This book was released on 2022-12-01. Available in PDF, EPUB and Kindle. Book excerpt: The echinoderms are an ideal group to understand evolution from a holistic, interdisciplinary framework. The genetic regulatory networks underpinning development in echinoderms are some of the best known for any model group. Additionally, the echinoderms have an excellent fossil record, elucidating in in detail the evolutionary changes underpinning morphological evolution. In this Element, the echinoderms are discussed as a model group for molecular palaeobiological studies, integrating what is known of their development, genomes, and fossil record. Together, these insights shed light on the molecular and morphological evolution underpinning the vast biodiversity of echinoderms, and the animal kingdom more generally.

Virtual Paleontology

2021-11-11 Science
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Release : 2021-11-11
Genre : Science
Kind : eBook
Book Rating : 153/5 ( reviews)

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Book Synopsis Virtual Paleontology by : Jennifer E. Bauer

Download or read book Virtual Paleontology written by Jennifer E. Bauer. This book was released on 2021-11-11. Available in PDF, EPUB and Kindle. Book excerpt: Imaging and visualizing fossils in three dimensions with tomography is a powerful approach in paleontology. Here, the authors introduce select destructive and non-destructive tomographic techniques that are routinely applied to fossils and review how this work has improved our understanding of the anatomy, function, taphonomy, and phylogeny of fossil echinoderms. Building on this, this Element discusses how new imaging and computational methods have great promise for addressing long-standing paleobiological questions. Future efforts to improve the accessibility of the data underlying this work will be key for realizing the potential of this virtual world of paleontology.

A Review and Evaluation of Homology Hypotheses in Echinoderm Paleobiology

2023-04-13 Science
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Release : 2023-04-13
Genre : Science
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Book Rating : 168/5 ( reviews)

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Book Synopsis A Review and Evaluation of Homology Hypotheses in Echinoderm Paleobiology by : Colin D. Sumrall

Download or read book A Review and Evaluation of Homology Hypotheses in Echinoderm Paleobiology written by Colin D. Sumrall. This book was released on 2023-04-13. Available in PDF, EPUB and Kindle. Book excerpt: The extraxial-axial theory (EAT) and universal elemental homology (UEH) are often portrayed as mutually exclusive hypotheses of homology within pentaradiate Echinodermata. EAT describes homology upon the echinoderm bauplan, interpreted through early post-metamorphic growth and growth zones, dividing it into axial regions generally associated with elements of the ambulacral system and extraxial regions that are not. UEH describes the detailed construction of the axial skeleton, dividing it into homologous plates and plate series based on symmetry, early growth, and function. These hypotheses are not in conflict; the latter is rooted in refinement of the former. Some interpretive differences arise because many of the morphologies described from eleutherozoan development are difficult to reconcile with Paleozoic forms. Conversely, many elements described for Paleozoic taxa by UEH, such as the peristomial border plates, are absent in eleutherozoans. This Element recommends these two hypotheses be used together to generate a better understanding of homology across Echinodermata.

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