Cloth $73.00 ISBN: 9780226845487 Published June 2004
Paper $37.50 ISBN: 9780226845494 Published August 2006

On the Origin of Phyla

James W. Valentine

James W. Valentine

608 pages | 9 halftones, 252 line drawings | 7 x 10 | © 2004
Cloth $73.00 ISBN: 9780226845487 Published June 2004
Paper $37.50 ISBN: 9780226845494 Published August 2006
Owing its inspiration and title to On the Origin of Phlya, James W. Valentine's ambitious book synthesizes and applies the vast treasury of theory and research collected in the century and a half since Darwin's time. By investigating the origins of life's diversity, Valentine unlocks the mystery of the origin of phyla.

One of the twentieth century's most distinguished paleobiologists, Valentine here integrates data from molecular genetics, evolutionary developmental biology, embryology, comparative morphology, and paleontology into an analysis of interest to scholars from any of these fields. He begins by examining the sorts of evidence that can be gleaned from fossils, molecules, and morphology, then reviews and compares the basic morphology and development of animal phyla, emphasizing the important design elements found in the bodyplans of both living and extinct phyla. Finally, Valentine undertakes the monumental task of developing models to explain the origin and early diversification of animal phyla, as well as their later evolutionary patterns.

Truly a magnum opus, On the Origin of Phyla will take its place as one of the classic scientific texts of the twentieth century, affecting the work of paleontologists, morphologists, and developmental, molecular, and evolutionary biologists for decades to come.

"A magisterial compendium . . . . Valentine offers a judicious evaluation of an astonishing array of evidence."—Richard Fortey, New Scientist

"Truly a magnum opus, On the Origin of Phyla has already taken its place as one of the classic scientific texts of the twentieth century, affecting the work of paleontologists, morphologists, and developmental, molecular, and evolutionary biologists for decades to come."—Ethology, Ecology & Evolution

"Valentine is one of the Renaissance minds of our time. . . . Darwin wisely called his best-known work On the Origin of the Species; the origin of the phyla is an even stickier problem, and Valentine deserves credit for tackling it at such breadth . . . . A magnificient book."—Stefan Bengtson, Nature 

Richard Fortey | New Scientist
"Valentine brings together a mass of evidence from many sources in a magisterial compendium. . . . There is direct evidence from the fossil record, of course. But there is also new evidence from trees of relationships derived from studying similarities in gene sequences of living animals. These are often ambiguous. Then there is evidence from the way genes are expressed during the growth and development of the body plans of animals. . . . Add to this classical morphology and embryology. . . . It is an astonishing range of information all brought together within one pair of covers. It's enough to make mere mortals awestruck. . . . Valentine [offers] a judicious evaluation of an astonishing array of evidence."
R. Andrew Cameron | Science
"A likely candidate for the bookshelves of those who hunt for pre-Cambriam fossils or the historical patterns in DNA sequences."
Stefan Bengtson | Nature
"Valentine [is] one of the Renaissance minds of our time. . . . Darwin wisely called his best-known work On the Origin of Species; the origin of phyla is an even stickier problem, and Valentine deserves credit for tackling it at such breadth. . . . A magnificent book."—Stefan Bengtson, Nature
Alessandro Minelli | Trends in Ecology and Evolution
"Valentine has indeed produced a wonderfully informative and well-written book by mixing together three basic ingredients that are now available: paleontology, molecular phylogeny, and developmental genetics."
Rudolf A. Raff | Evolution & Development
"Valentine envisions the study of the origins of phyla as a multidisciplinary investigation of patterns and process. His book provides a masterful guide to what we know about the origins of the phyla and current research issues relating to the early history of animal life. . . . Valentine does not hesitate to speak his mind, which gives the book a forceful discussion of well-argued ideas."
Francisco J. Ayala | Quarterly Review of Biology
"A magnificent book--authoritative, rich with relevant knowledge, and clearly written. It may be many years before it will be surpassed by any other treatise on the subject."
For more information, or to order this book, please visit http://www.press.uchicago.edu
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