The Evolution of the Metazoa

The Evolution of the Metazoa

International Series of Monographs on Pure and Applied Biology: Zoology, Vol. 16

1st Edition - January 1, 1963

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  • Author: Jovan Hadži
  • eBook ISBN: 9781483226637

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Description

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.

Table of Contents


  • Preface

    Introduction

    Chapter 1. Cnidaria as the only Coelenterata

    The Systematic Position of the Spongiae

    The Systematic Position of the Ctenophora

    Cnidaria as the only Coelenterata

    Something about the Methods that can be Used in Connection with the Construction of the Natural Animal System

    The Significance of the Sessile Way of Life

    The Role of the Polymerization and of Subsequent Oligomerization during the Phylogeny

    The Validity of Watson's Rule for the Invertebrates

    Chapter 2. The Previous Interpretations of Cnidaria

    The Origin of Cnidaria

    The Right Sequence of the Cnidaria Groups

    Why is there no Medusa Form in Anthozoa?

    The Primarily Solitary Polyps Appear in Anthozoa only

    Polymorphism Has Reached Its Climax in Hydrozoa

    The Regressive Development of the Intermediate Layer in Cnidaria

    The Morphologic Proofs of the New Interpretation of the Phylogeny of Cnidaria

    Muscular Tissue

    The Nervous System

    The Emunctory-Excretory Organ

    The Genital System

    The Alternation of Generations in Cnidaria

    The Digestive System

    The Skin and Cnidae

    Ontogeny (the Development of the Embryo)

    Asexual Reproduction and the Regeneration

    The Endosymbiotic Mononuclear Algae

    Chapter 3. The Consequences of the New Interpretation of Cnidaria

    The New System of the Cnidaria

    The Rank and the Position of Cnidaria in the Animal System

    Discussion of the New Interpretation of the Evolution of Cnidaria

    The Probable Origin of Cnidaria

    The Larvae of "Cnidaria"

    A Comparison of Cnidaria Larvae with Other Larvae

    The Origin of the Turbellaria

    The Origin of the Acoelous Turbellaria

    The Relationship between Conjugation and Copulation

    The Point of Separation of the Evolutions of Infusoria and Eumctazoa

    The Origin of the Complex, Hypercellular Individualities

    Is the Plasmodial State of the Acoela a Primary Element?

    An Attempt to Reconstruct the Initial State of the Eumetazoa

    The Origin of the Middle Body Layer of the So-Called Mesoderm

    Two Difficulties of the Theory of Polykaryonts

    Can Cleavage be Really Considered as a Proof of the Colonial Theory?

    The Basic Principles that should be Used in a Reform of the Whole Animal System

    Evolution Generally had a Progressive Trend

    Chapter 4. The Classification of the Animal World and the New Genealogical Tree

    General Premises

    The Limit between the Plant and the Animal Worlds

    The System of the Protozoa

    The Transition from the Protozoa to the Metazoan State

    There Are No Well-Warranted Mesozoa

    The Classification of Metazoa

    The Parazoa as an Independent Subregnum

    The Eumetazoa and their Subdivisions

    The Elimination of the Terms Coelenterata-Coelomata

    The Coelomata as a Taxonomic Unit

    The First Phylum of the Eumetazoa: The Ameria

    The Transition from the Amerous to the Polymerous State

    The Problem of Justification of the High Taxons: Protostomia-Deuterostomia

    The Classes of the Polymeria

    The Phylum Oligomeria and Its Classes

    The Sphere of the Phylum Oligomeria

    The Problem of the Inclusion of the Sipunculida into the Phylum Oligomeria

    The Oligomeria as the Initial Form for the Evolution of the Chordonia

    The Fourth and the Last Phylum of the Eumetazoa: Chordonia

    The Probable Origin of the Chordonia

    A Comparison of the Present Attempt to Derive the Chordonia from the Ancestral Form Resembling the Present Day Enteropneusta with the Similar Attempt Made by Hans Steiner

    The Genealogical Tree of the Chordonia

    The Genealogical Tree of the Entire Animal World

    An Attempt to Unify the Animal System

    Bibliography

    Index

Product details

  • No. of pages: 512
  • Language: English
  • Copyright: © Pergamon 1963
  • Published: January 1, 1963
  • Imprint: Pergamon
  • eBook ISBN: 9781483226637

About the Author

Jovan Hadži

About the Editor

G. A. Kerkut

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