Five Kingdoms, 3rd Edition: An Illustrated Guide to the Phyla of Life On Earth [Paperback]

However, this is more than simply a collection of illustrative examples of various organisms. The most fascinating chapter relates the authors' proposal to modify one of the standard classifications of life - the Protoctists, replacing Whittiker's Protists. "The Kingdom Protoctista is defined by exclusion," they state. "Its members are neither animals, plants, fungi nor procaryotes." Their common characteristics are nucleated cells, some kind of flagellum and live in an oxygenated atmosphere [unlike many unicellular forms which cannot tolerate oxygen. Their argument contends that many multicellular forms are more
directly related to these unicellular forms than they are to other multi-celled organisms. The new classification "also solves the problem of blurred boundaries that arises if the unicellular organisms are assigned to the multicellular kingdoms." They list 27 phyla [of 36 total]with diagrams exhibiting a range of bizarre structures and life cycles.

Another noteworthy entry is Trichoplax adhaerens. Remember the name of this creature - "it is the simplest of animals." Composed of but a few thousand cells, it is a dull gray body just visible to the unaided eye. In looking at the photo and diagram of this creature invokes a sense of wonder - this is, after all, a distance relative living in the nearest aquarium with the shad.

This book is a delight to browse following one of the authors' intents. Their second purpose, using this book as a reference, is even more admirably met. Clear photographs coupled with excellent diagrams, including typical environments of the selected specimens, add visual support to a readable text base. Any reader interested in the way life is structured and seeking insights into evolutionary development would do well to consider this book. It's not an academic text, but conveys a wealth of meaningful information.

I know that when I was reading through the section detailing the Animal phylla, I was struck by how many creatures -- entire phyllums -- get along without even rudimentary brains (or digestive systems, respiratory systems, circulatory systems, or even organs, altogether, in some cases). Likewise I was surprised to learn that only two phylla (including our own) ever developed winged flight.

The sections comprising the non-Animal kingdoms were of particular interest to me mainly for the simple reason that they invariably get little attention from most texts. At best, you'll usally find a chapter dealing with micro-organisms as a whole, and a brief chapter on plants. To see how much sheer diverity there is in just the Fungus kingdom is eye-opening.

I will note that the book does assume a basic level of biological literacy and that it sometimes throws jargon at the reader with little warning or explaination but, as a whole, this is a very accessible work and well worth having on one's shelf.