This book provides the first unbiased guide to a field newly invigorated by technical advances in molecular and developmental biology. This book will be essential reading for students and researchers in areas such as developmental biology, vertebrate zoology and palaeontology.
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Henry Gee has admirably mastered a formidable library of scattered reference to bring this timely book together...Palaeontologists, zoologists and geneticists should read this book and learn from it. - Endeavour The book is a true mine of information. - Ethology Ecology & Evolution Before the Backbone is certainly a valuable addition to my bookshelf, and I commend it to all of those interested in vertebrates in particular or in metazoan phylogeny as a whole. - Geological Magazine
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Vertebrates include many of the animals with which we are familiar. Read the first page
Front Cover | Copyright | Table of Contents | Excerpt | Index | Back Cover
Vertebrates include many of the animals with which we are familiar. Read the first page
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Front Cover | Copyright | Table of Contents | Excerpt | Index | Back Cover
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The emergence of the vertebrate head
26 Nov 2000
By Howard Schneider
- Published on Amazon.com
Format:Hardcover
The general reader with some background in comparative anatomy, will find this reference an informative discussion on historical views (eg, Garstang, Gislén, Romer, etc), not so historical views (eg, Jefferies), and modern anatomical and molecular results concerning how vertebrates arose. A wide varieties of views are supported, but a number of conclusions are nonetheless formulated. Gislén's view of the carpoid as an echinoderm with chordate affinities is considered more correct than Jefferies' view of the carpoid as a chordate with echinoderm affinities. Recent molecular evidence supports chordates diverging from (echinoderms and hemichordates), and within the chordates, urochordates diverging from (cephalochordates and craniates). Larval paedomorphosis as the mechanism originating the vertebrates is unlikely, and the sessility of tunicates is probably a derived trait. While strong homologies between homeobox genes and organ systems in both arthropods and vertebrates are acknowledged, it is noted that molecular methods set deuterostome phyla clearly apart from protostome phyla, suggesting the direct ancestry of the vertebrates is not from the arthropods. Molecular methods also indicate that the amphioxus is not a degenerate vertebrate, but essentially a primitive one, and elaboration of its features leads to the emergence of the vertebrate head.
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