The Lower Metazoa
Author | : Ellsworth Charles Dougherty |
Publisher | : |
Total Pages | : 490 |
Release | : 2012-04-01 |
Genre | : |
ISBN | : 9781258281946 |
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Additional Contributor Is Willard D. Hartman.
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Author | : Ellsworth Charles Dougherty |
Publisher | : |
Total Pages | : 490 |
Release | : 2012-04-01 |
Genre | : |
ISBN | : 9781258281946 |
Additional Contributor Is Willard D. Hartman.
Author | : Ellsworth C. Dougherty |
Publisher | : |
Total Pages | : 510 |
Release | : 1963 |
Genre | : Invertebrates |
ISBN | : |
Author | : Ellsworth C. Dougherty |
Publisher | : Univ of California Press |
Total Pages | : 502 |
Release | : |
Genre | : |
ISBN | : |
Author | : Werner E.G. Müller |
Publisher | : Springer Science & Business Media |
Total Pages | : 257 |
Release | : 2012-12-06 |
Genre | : Science |
ISBN | : 3642487459 |
This volume concentrates on the origin of multicellular animals, Metazoa. Until now, no unequivocal phylogeny has been produced. Therefore, the questions remain: Did Metazoa evolve from the Protozoa only once, or several times? Is the origin of animals monophyletic or polyphyletic? Especially the relationships between the existing lower metazoan phyla, particularly the Porifera (sponges) are uncertain. Based on sequence data of genes typical for multicellularity it is demonstrated that all Metazoa, including Porifera, should be placed into the kingdom Animalia together with the Eumetazoa. Therefore it is most likely that all animals are of monophyletic origin.
Author | : Daniel R. Brooks |
Publisher | : University of Chicago Press |
Total Pages | : 456 |
Release | : 1991 |
Genre | : Science |
ISBN | : 9780226075716 |
"The merits of this work are many. A rigorous integration of phylogenetic hypotheses into studies of adaptation, adaptive radiation, and coevolution is absolutely necessary and can change dramatically our collective 'gestalt' about much in evolutionary biology. The authors advance and illustrate this thesis beautifully. The writing is often lucid, the examples are plentiful and diverse, and the juxtaposition of examples from different biological systems argues forcefully for the validity of the thesis. Many new insights are offered here, and the work is usually accessible to both the practiced phylogeneticist and the naive ecologist."—Joseph Travis, Florida State University "[Phylogeny, Ecology, and Behavior] presents its arguments forcefully and cogently, with ample . . .support. Brooks and McLennan conclude as they began, with the comment that evolution is a result, not a process, and that it is the result of an interaction of a variety of processes, environmental and historical. Evolutionary explanations must consider all these components, else they are incomplete. As Darwin's explanations of descent with modification integrated genealogical and ecological information, so must workers now incorporate historical and nonhistorical, and biological and nonbiological, processes in their evolutionary perspective."—Marvalee H. Wake, Bioscience "This book is well-written and thought-provoking, and should be read by those of us who do not routinely turn to phylogenetic analysis when investigating adaptation, evolutionary ecology and co-evolution."—Mark R. MacNair, Journal of Natural History
Author | : W. Patrick Luckett |
Publisher | : Springer Science & Business Media |
Total Pages | : 320 |
Release | : 2013-11-11 |
Genre | : Science |
ISBN | : 1468410512 |
Tree shrews are small-bodied, scansorial, squirrel-like mammals that occupy a wide range of arboreal, semi-arboreal, and forest floor niches in Southeast Asia and adjacent islands. Comparative aspects of tree shrew biology have been the subject of extensive investigations during the past two decades. These studies were initiated in part because of the widely accepted belief that tupaiids are primitive primates, and, as such, might provide valuable insight into the evolutionary origin of complex patterns of primate behavior, locomotion, neurobiology, and reproduction. During the same period, there has been a renewed interest in the methodology of phylogenetic reconstruction and in the use of data from a variety of biological disciplines to test or formulate hypotheses of evolutionary relationships. In particular, interest in the com parative and systematic biology of mammals has focused on analysis of phy logenetic relationships among Primates and a search for their closest relatives. Assessment of the possible primate affinities of tree shrews has comprised an important part of these studies, and a considerable amount of dental, cranio skeletal, neuroanatomical, reproductive, developmental, and molecular evi dence has been marshalled to either corroborate or refute hypotheses of a special tupaiid-primate relationship. These contrasting viewpoints have re sulted from differing interpretations of the basic data, as well as alternative approaches to the evolutionary analysis of data.
Author | : Alan Boyden |
Publisher | : Elsevier |
Total Pages | : 309 |
Release | : 2013-10-22 |
Genre | : Science |
ISBN | : 1483146081 |
Perspectives in Zoology tries to discuss in a critical way some of the aspects of biology that lack perspective. The book also calls into attention the possibilities of obtaining a more correct view and challenges views that already have already been accepted by the scientific community. In this thought-provoking book, many questions are raised and different viewpoints and their implications are considered in the areas of natural history. Coverage includes the great ages of evolution; the primitive evolution in the eumatozoa; the morphological comparisons between homology and analogy; systematic serology and its principles; and the relationship of systemics, evolution, and phylogeny. The text is recommended for students and professors that deal with biology, zoology, genetics, and evolution who not only wish to explore and understand other approaches to popular theories in zoology, but also wish to be more familiarized and delve deeper with the common yet frequently discussed and debated topics in the field.
Author | : Jovan Hadži |
Publisher | : Elsevier |
Total Pages | : 514 |
Release | : 2013-09-03 |
Genre | : Science |
ISBN | : 1483226638 |
Zoology, Volume 16: The Evolution of the Metozoa presents the significant results of the Cnidaria research, their interpretations and implications in the field of zoology. This book is composed of four chapters, and begins with the establishment of the systematic position of the Spongiae, the position of Ctenophora in the animal classification, and Cnidaria as the only Coelenterata. The subsequent chapter deals with a critical survey of the interpretations of the origin and nature of Cnidaria, with emphasis on the morphologic proofs of its phylogeny. These topics are followed by an outline of the most probable reconstruction of the phylogeny of Cnidaria and the descriptions of the evolution of this metozoa. The final chapter considers the established classification of the animal world and the genealogical tree. This book will be of value to zoologists and researchers who are interested in evolution and classification of Cnidaria.
Author | : Niles Eldredge |
Publisher | : |
Total Pages | : 349 |
Release | : 1980 |
Genre | : |
ISBN | : 9780231083782 |
Author | : Universität Osnabrück |
Publisher | : Springer Science & Business Media |
Total Pages | : 391 |
Release | : 2006-03-30 |
Genre | : Science |
ISBN | : 1402032404 |
Recently, evidence has been accumulated which shows that some of the groups formerly regarded as independent "phyla" such as Pogonophora (now recognized as Siboglinidae), Echiura, Myzostomida and perhaps Sipuncula, are most probably nothing else than greatly modified Annelida. The extreme morphological diversity found especially in Polychaeta displays the plasticity of a simple segmented organisation that basically is nothing else but a serial repetition of identical units. Thus, annelids are highly important to our understanding of fundamental questions about morphological and adaptive diversity, as well as clarifying evolutionary changes and phylogenetic relationships. The book aims to summarize our knowledge on Polychaetes polychaetes and their allies and gives an overview of recent advances gained by studies that employed conventional and modern methods plus, increasingly and importantly, the use of molecular markers and computer-assisted kinship analyses. It also reflects the state of art in polychaete sciences and presents new questions and controversies. As such it will significantly influence the direction of research on Polychaeta and their related taxa.